CN100395471C - A transmission that utilizes stored energy to achieve variable speed functions - Google Patents

Abstract

The present invention relates to a transmission device which reaches the speed changing function by utilizing energy storage and is used for driving a carriage to traverse. The speed changing transmission mechanism is arranged on a base and is driven by a motor. A first energy storage mechanism which is fixed to the speed changing transmission mechanism has coaction with a first crossbar lock mechanism which is fixed to the base so as to store and release the energy of the driven carriage, so that the output of the speed changing transmission mechanism can be switched to change the moving rate of the carriage.

Description

A transmission that utilizes stored energy to achieve variable speed functions

technical field

The present invention relates to a variable-speed transmission device, in particular to a transmission device that utilizes stored energy to achieve a speed-changing function.

Background technique

Traditional transmission devices usually use extra manpower or motor power to move the relative positions of several gears in the gear set to create different meshing modes and transmission paths to achieve the purpose of changing the reduction ratio.

U.S. Patent No. 6,189,395; 6,244,124; 6,626,057; and No. 6,366,343 bulletins (respectively corresponding to Republic of China Patent No. 421401; 426290; 462568; and No. The speed change mechanism provides the scanner with the speed required for high-resolution scanning and low-resolution scanning. However, these known technologies still require additional motor power to achieve the switching function of the variable speed. Adding an additional motor to provide the power required for speed change will inevitably add a set of motor control circuits, which not only increases the cost of the equipment, takes up a considerable space, but also consumes extra power, which cannot meet the needs of power saving.

Therefore, how to provide a transmission device that does not require an additional motor power source to achieve speed conversion is the problem to be solved by the present invention.

Contents of the invention

Therefore, an object of the present invention is to provide a transmission device that uses stored energy to achieve a speed change function, so as to complete the speed change action without the driving power of an additional motor or manpower.

To achieve the above object, the present invention provides a transmission device utilizing stored energy to achieve a speed change function, and is used to drive a carriage to move back and forth between a first position and a second position. The transmission device includes a base, a motor fixed on the base, a variable speed transmission mechanism installed on the base, a first elastic member fixed to the variable speed transmission mechanism and a first elastic member fixed to the base. latch mechanism. The variable speed transmission mechanism is driven by the motor, and has a first state for driving the carriage to move at a first speed, and a second state for driving the carriage to move at a second speed. The first state and the first rate are different from the second state and the second rate, respectively. The first elastic member has a first energy storage state and a first energy release state. The first elastic member is acted upon by the carriage close to the base to store a first energy to be in a first energy storage state. The first latch mechanism has a first latch state and a first release state, and is used for respectively latching and releasing the variable speed transmission mechanism so that the variable speed transmission mechanism is in the first state and the second state respectively. When the first latch mechanism is in the first latch state, the variable speed transmission mechanism is in the first state, and the carriage is close to the first elastic member so that the first elastic member is in the first energy storage state; when the first latch mechanism is in the first state In the first released state, the first elastic member in the first energy storage state releases energy and enters the first energy release state, so that the variable speed transmission mechanism is in the second state.

The above transmission device may further include a second elastic member and a second latch mechanism. The second elastic member is fixed to the variable speed transmission mechanism and has a second energy storage state corresponding to the first energy release state and a second energy release state corresponding to the first energy storage state. The second elastic member stores energy in the second state and releases energy in the first state. The second latch mechanism is fixed to the base and has a second latch state and a second release state for respectively latching and releasing the variable speed transmission mechanism so that the variable speed transmission mechanism is respectively in the second state and the second release state. first state. The second latch state of the second latch mechanism is such that the variable speed transmission is in the second state. The second released state of the second latch mechanism is such that the variable speed transmission is in the first state.

In this way, it is possible to provide a transmission device that utilizes stored energy to achieve a speed change function, so that the speed change action can be completed without the driving power of an additional motor or the action of manpower.

Description of drawings

FIG. 1 shows a schematic diagram of a scanning device using a transmission device according to a first embodiment of the present invention;

Figure 2 shows a partial schematic view of the first state of Figure 1;

Fig. 3 shows the partial schematic diagram of the second state of Fig. 1;

4 shows a schematic diagram of a scanning device using a transmission device according to a second embodiment of the present invention;

Figure 5 shows a partial schematic view of the first state of Figure 4;

Fig. 6 shows the partial schematic diagram of the second state of Fig. 4;

FIG. 7 shows a schematic diagram of a scanning device using a transmission device according to a third embodiment of the present invention.

Detailed ways

1 to 3 are schematic diagrams of a scanning device using a transmission device according to a first embodiment of the present invention. As shown in Figures 1 to 3, the transmission device 1 using stored energy to achieve the speed change function of this embodiment is applied in a scanning device to drive a scanning module of the scanning device to move back and forth for scanning a document. An image can also be used in other devices to drive a carriage 2 (Carriage) to move back and forth between a first position P1 and a second position P2. There are two reasons why the scanning device needs a variable-speed transmission device. One is that the scanning process of documents with different resolutions requires different moving speeds of the scanning module, and the other is that the return journey after scanning can be completed at a faster speed.

The transmission device 1 includes a base 10 , a motor 11 , a variable speed transmission mechanism 12 , a first elastic member 13 and a first latch mechanism 14 . The motor 11 is fixed on the base 10 . The variable speed transmission mechanism 12 is mounted on the base 10 and driven by the motor 11 .

The variable speed transmission mechanism 12 has a first state (FIGS. 1 and 2) for driving the carriage 2 to move at a first speed, and a second state (FIG. 2) for driving the carriage 2 to move at a second speed. 3), wherein the first state and the first rate are different from the second state and the second rate, respectively. That is, the variable transmission mechanism 12 may have, for example, two different reduction ratios.

The variable speed transmission mechanism 12 includes a driving gear 20 , a swing arm 21 , an idler gear 22 , a first transmission mechanism 30 and a second transmission mechanism 40 . The driving gear 20 is driven to rotate by the motor 11 . The swing arm 21 is coaxial with the driving gear 20, can rotate around the central axis of the driving gear 20, and can be in a third state (Fig. 1 and 2) corresponding to the first state and a first state corresponding to the second state. Four state (Figure 3) swing between. The idler gear 22 is installed on the swing arm 21 , contacts with the driving gear 20 , and is driven by the driving gear 20 to rotate.

The first transmission mechanism 30 is in contact with the idler wheel 22 on the swing arm 21 in the third state to drive the carriage 2 to move at the first speed. The first transmission mechanism 30 includes a belt 33 and a coaxial first gear 31 and a pulley 32 . The first gear 31 meshes with the idler gear 22 in the first state. The belt 33 is driven by the pulley 32 to drive the carriage 2 to move.

The second transmission mechanism 40 is in contact with the idler wheel 22 on the swing arm 21 in the second state to drive the carriage 2 to move at the second speed. The second transmission mechanism 40 comprises a coaxial second gear 41 and a third gear 42, a coaxial fourth gear 43 and a fifth gear 44, a coaxial first gear 31 and pulley 32, and a belt 33 . The second gear 41 meshes with the idler 22 in the second state and is used to be driven to rotate by the idler 22 . The fourth gear 43 meshes with the third gear 42 . The first gear 31 meshes with the fifth gear 44 . The belt 33 is driven by the pulley 32 to drive the carriage 2 to move. In this embodiment, the first transmission mechanism 30 and the second transmission mechanism 40 have the same output, so the second transmission mechanism 40 also includes the first gear 31 , the pulley 32 and the belt 33 of the first transmission mechanism 30 .

The first elastic member 13 can be a spring, a weight and a pneumatic cylinder, it is fixed to the swing arm 21 of the variable speed transmission mechanism 12, and has a first energy storage state (Fig. 2) and a first energy release state (image 3). The so-called energy storage state is the stored energy in which the first elastic member 13 absorbs the work done by the external force and stores it inside. The so-called energy-releasing state means that the first elastic member 13 releases the energy stored inside to perform work on the outside. For example, the first elastic member 13 is changed its state by the action of the push rod (object) 2A of the carriage 2 approaching the first position P1 or the base 10, and stores a first energy to be in the first energy storage state, as shown in picture 2.

The first latch mechanism 14 can be a solenoid valve, which is fixed to the base 10 and has a first latched state (FIGS. 1 and 2) and a first released state (FIG. 3) for latching respectively Lock and release the swing arm 21 of the variable speed transmission mechanism 12, so that the variable speed transmission mechanism 12 is in the first state and the second state respectively. The first latch state of the first latch mechanism 14 is such that the variable speed transmission 12 is in the first state. The first released state of the first latch mechanism 14 is such that the variable speed transmission 12 is in the second state.

In order to restore the variable speed transmission mechanism 12 from the second state ( FIG. 3 ) to the first state ( FIG. 2 ), the transmission device 1 further includes a second elastic member 15 and a second latch mechanism 16 . The second elastic member 15 can be a spring, a weight and a pneumatic cylinder, it is fixed to the swing arm 21 of the variable speed transmission mechanism 12, and has a second energy storage state corresponding to the first energy release state (Fig. 3 ) and a second energy release state corresponding to the first energy storage state (FIG. 1 and FIG. 2). The second elastic member 15 stores energy in the second state, and releases energy in the first state. Adding the second elastic member 15 has an additional advantage, that is, the first latch mechanism 14 and the second latch mechanism 16 with relatively weak latching force can be configured, so that the cost can be reduced. The second latch mechanism 16 may be a solenoid valve, which is fixed to the base 10 and has a second latched state (FIG. 3) and a second released state (FIGS. 1 and 2) for latching, respectively. Lock and release the swing arm 21 of the variable speed transmission mechanism 12, so that the variable speed transmission mechanism 12 is in the second state and the first state respectively. The second latch state of the second latch mechanism 16 is such that the variable speed transmission 12 is in the second state. The second released state of the second latch mechanism 16 is such that the variable speed transmission 12 is in the first state.

In the first embodiment, the carriage 2 moves from the first position P1 to the second position P2 at a second speed (for example, a low speed), and the variable speed transmission mechanism 12 at this time is shown in FIG. 3 . The carriage 2 then moves from the second position P2 to the first position P1 at a first speed (eg high speed). This mode of operation can meet the needs of normal scanning. However, when the starting point of the document to be scanned (or the starting point of the frame selection range to be scanned by the user) is not close to the first position P1, the carriage 2 cannot move to the position of the starting point of the document at a high speed and then starts to proceed at a low speed. scanning. To solve this problem, the present invention proposes the second embodiment described below.

4 to 6 show schematic views of a scanning device using a transmission device according to a second embodiment of the present invention. As shown in Figures 4 to 6, the second embodiment is similar to the first embodiment, except that the transmission device of the second embodiment further includes a third latch mechanism 18, which is fixed to the base 10, and It has a third latch state (Figure 5 and Figure 6) and a third release state (Figure 4), which are used to respectively latch and release the first elastic member 13, so that the first elastic member 13 is respectively in the first The energy storage state (Figure 5 and Figure 6) and the first energy release state (Figure 4). When the carriage 2 is disengaged from the first elastic member 13, the third latch mechanism 18 is in the third latch state, the second latch mechanism 16 is in the second released state, and the first latch mechanism 14 is in the first latch state. state, whereby the variable speed transmission mechanism 12 is in the first state. When the carriage 2 moves to a third position P3 between the first position P1 and the second position P2, the third latch mechanism 18 is in the third latch state, and the second latch mechanism 16 is in the second latch state. state, and the first latch mechanism 14 is in the first released state, so that the variable speed transmission mechanism 12 is in the second state.

In the second embodiment, the carriage 2 can move from the first position P1 to the third position P3 at a first speed (for example, high speed), and the variable speed transmission mechanism 12 at this time is shown in FIG. 6 . Next, the carriage 2 moves from the third position P3 to the second position P2 at a second speed (eg, a low speed). The carriage 2 then moves from the second position P2 to the first position P1 at a first speed (eg high speed). When the third latch mechanism 18 is always in the third released state, the function of the second embodiment is exactly the same as that of the first embodiment.

FIG. 7 shows a schematic diagram of a scanning device using a transmission device according to a third embodiment of the present invention. This embodiment is similar to the second embodiment, the difference is that the entire transmission device 1 is fixed on the carriage 2 , and the carriage 2 and the transmission device 1 are housed in a casing 3 . In addition, in this embodiment, a pulley 34 is added, and the closed belt 33 is changed to an open belt 35 to meet the requirement. It should be noted that the pulley 34 can be fixed on the carriage 2 or on the base 10 , and the base 10 itself can be a part of the carriage 2 . In the application of the scanner, there is a so-called self-propelled scanning module, and the structure of this embodiment can be applied. In this embodiment, the transmission device 1 is also used to drive itself and the carriage 2 to move back and forth between a first position and a second position. The first elastic member 13 is also affected by a push rod (object) 3A approaching the housing 3 of the base 10 to store a first energy to be in a first energy storage state. Therefore, the first, second, and third embodiments of the present invention can be summarized as that the first elastic member 13 is subjected to an object (3A or 2A) close to the base 10 to store a first energy to be in a first A state of energy storage.

Through the above-mentioned structure of the present invention, a transmission device that uses stored energy to achieve a speed change function can be realized, so as to complete the speed change action without the driving power of an additional motor or manpower.

The specific embodiments proposed in the detailed description of the preferred embodiments are only used to facilitate the description of the technical content of the present invention, rather than restricting the present invention to the above-mentioned embodiments in a narrow sense, without departing from the spirit of the present invention and the scope of the claims Under the circumstances, the implementation of various changes all belong to the scope of the present invention.

Component representative symbol description

P1 first position

P2 second position

P3 third position

1 transmission

2 carriages

2A putter

3 shell

3A putter

10 base

11 motor

12 variable speed transmission mechanism

13 first elastic member

14 first latch mechanism

15 second elastic member

16 second latch mechanism

18 third latch mechanism

20 driving gear

21 swing arms

22 idler

30 The first transmission mechanism

31 first gear

32 Pulley

33 belt

34 Pulley

35 belt

40 second transmission mechanism

41 second gear

42 third gear

43 fourth gear

44 fifth gear

Claims (44)

1. a transmission device that utilizes stored energy to reach speed changing function moves around between the primary importance and the second place in order to drive balladeur train, and this transmission device comprises:

Pedestal;

Power source is fixed on this pedestal;

The variable speed driving mechanism, it is installed on this pedestal, and be subjected to this drive power source, and have in order to drive first state that this balladeur train moves with first rate, and in order to drive second state that this balladeur train moves with second speed, this first state and this first rate are different from this second state and this second speed respectively; It is characterized in that this transmission device also comprises:

First resilient member, it is fixed on this variable speed driving mechanism, and have that the first energy storage state and first releases can state, this first resilient member is subjected to storing first energy to be in this first energy storage state near the effect of this balladeur train of this pedestal; And

First bolt lock mechanism, it is fixed to this pedestal, and has first latch mode and first releasing orientation, in order to breech lock respectively and unclamp this variable speed driving mechanism, makes this variable speed driving mechanism be in this first state and this second state respectively,

When wherein this first bolt lock mechanism was in described first latch mode, this variable speed driving mechanism was in this first state, and described balladeur train makes described first resilient member be in the first energy storage state near described first resilient member; When this first bolt lock mechanism was in first releasing orientation, first resilient member that is in the first energy storage state released energy and enters described first release can state, makes this variable speed driving mechanism be in this second state.

2. the transmission device that utilizes stored energy to reach speed changing function as claimed in claim 1, wherein this variable speed driving mechanism comprises:

Driving gear is rotated by this drive power source;

Swing arm, coaxial with this driving gear, and can between corresponding to the third state of this first state and the four condition corresponding to this second state, swing;

Idle pulley is installed in this swing arm, and contacts with this driving gear;

First driving mechanism, it contacts with this idle pulley in this swing arm that is positioned at this third state, moves with this first rate in order to drive this balladeur train; And

Second driving mechanism, it contacts with this idle pulley in this swing arm that is positioned at this second state, moves with this second speed in order to drive this balladeur train.

3. the transmission device that utilizes stored energy to reach speed changing function as claimed in claim 2, wherein this first driving mechanism and this second driving mechanism have same output.

4. the transmission device that utilizes stored energy to reach speed changing function as claimed in claim 3, wherein this first driving mechanism comprises:

Coaxial first gear and belt pulley, this first gear mesh with this idle pulley under this first state; And

Belt is driven by this belt pulley and drives this balladeur train and move.

5. the transmission device that utilizes stored energy to reach speed changing function as claimed in claim 4, wherein this second driving mechanism comprises:

Second coaxial gear and the 3rd gear, this second gear mesh with this idle pulley under this second state;

The 4th coaxial gear and the 5th gear, the 4th gear and the 3rd gear engagement;

Coaxial this first gear and this belt pulley, this first gear and the 5th gear engagement; And

This belt is driven by this belt pulley and drives this balladeur train and move.

6. the transmission device that utilizes stored energy to reach speed changing function as claimed in claim 1, wherein this first resilient member is to be selected from one of group that is made up of spring and elastic rod.

7. the transmission device that utilizes stored energy to reach speed changing function as claimed in claim 1, wherein this first bolt lock mechanism is to be a solenoid valve.

8. the transmission device that utilizes stored energy to reach speed changing function as claimed in claim 1 more comprises:

Second resilient member, it is fixed to this variable speed driving mechanism, and having that first release the second energy storage state that can state and release corresponding to second of this first energy storage state can state corresponding to this, this second resilient member is stored energy under this second state, and releases energy under this first state; And

Second bolt lock mechanism, it is fixed to this pedestal, and have second latch mode and second releasing orientation, in order to breech lock respectively and unclamp this variable speed driving mechanism, make this variable speed driving mechanism be in this second state and this first state respectively, this second latch mode of this second bolt lock mechanism is to make this variable speed driving mechanism be in this second state, and this second releasing orientation of this second bolt lock mechanism is to make this variable speed driving mechanism be in this first state.

9. the transmission device that utilizes stored energy to reach speed changing function as claimed in claim 8, wherein this variable speed driving mechanism comprises:

Driving gear is rotated by this drive power source;

Swing arm, coaxial with this driving gear, and can between corresponding to the third state of this first state and the four condition corresponding to this second state, swing;

Idle pulley is installed in this swing arm, and contacts with this driving gear;

First driving mechanism, it contacts with this idle pulley in this swing arm that is positioned at this third state, moves with this first rate in order to drive this balladeur train; And

Second driving mechanism, it contacts with this idle pulley in this swing arm that is positioned at this second state, moves with this second speed in order to drive this balladeur train.

10. the transmission device that utilizes stored energy to reach speed changing function as claimed in claim 9, wherein this first driving mechanism and this second driving mechanism have same output.

11. the transmission device that utilizes stored energy to reach speed changing function as claimed in claim 10, wherein this first driving mechanism comprises:

Coaxial first gear and belt pulley, this first gear be following and this idle pulley engagement in this first state; And

Belt is driven by this belt pulley and drives this balladeur train and move.

12. the transmission device that utilizes stored energy to reach speed changing function as claimed in claim 11, wherein this second driving mechanism comprises:

Second coaxial gear and the 3rd gear, this second gear be following and this idle pulley engagement in this second state;

The 4th coaxial gear and the 5th gear, the 4th gear and the 3rd gear engagement;

Coaxial this first gear and this belt pulley, this first gear and the 5th gear engagement; And

This belt is driven by this belt pulley and drives this balladeur train and move.

13. the transmission device that utilizes stored energy to reach speed changing function as claimed in claim 8, wherein respectively this first and second resilient member is to be selected from one of group that is made up of spring and elastic rod.

14. as claim 8 a described transmission device that utilizes stored energy to reach speed changing function, wherein said first and second bolt lock mechanism is a solenoid valve.

15. the transmission device that utilizes stored energy to reach speed changing function as claimed in claim 8 more comprises:

The 3rd bolt lock mechanism, it is fixed to this pedestal, and has the 3rd latch mode and the 3rd releasing orientation, and in order to breech lock respectively and unclamp this first resilient member, making this first resilient member be in respectively that this first energy storage state and this first release can state, wherein,

When this balladeur train breaks away from this first resilient member, the 3rd bolt lock mechanism is in the 3rd latch mode, this second bolt lock mechanism is in this second releasing orientation, and this first bolt lock mechanism is in this first latch mode, uses making this variable speed driving mechanism be in this first state; And

When this balladeur train moves to the 3rd position between this primary importance and this second place, the 3rd bolt lock mechanism is in the 3rd latch mode, this second bolt lock mechanism is in this second latch mode, and this first bolt lock mechanism is in this first releasing orientation, uses to make this variable speed driving mechanism be in this second state.

16. the transmission device that utilizes stored energy to reach speed changing function as claimed in claim 15, wherein this variable speed driving mechanism comprises:

Driving gear is rotated by this drive power source;

Swing arm, coaxial with this driving gear, and can between corresponding to the third state of this first state and the four condition corresponding to this second state, swing;

Idle pulley is installed in this swing arm, and contacts with this driving gear;

First driving mechanism, it contacts with this idle pulley in this swing arm that is positioned at this third state, moves with this first rate in order to drive this balladeur train; And

Second driving mechanism, it contacts with this idle pulley in this swing arm that is positioned at this second state, moves with this second speed in order to drive this balladeur train.

17. the transmission device that utilizes stored energy to reach speed changing function as claimed in claim 16, wherein this first driving mechanism and this second driving mechanism have same output.

18. the transmission device that utilizes stored energy to reach speed changing function as claimed in claim 17, wherein this first driving mechanism comprises:

Coaxial first gear and belt pulley, this first gear be following and this idle pulley engagement in this first state; And

Belt is driven by this belt pulley and drives this balladeur train and move.

19. the transmission device that utilizes stored energy to reach speed changing function as claimed in claim 18, wherein this second driving mechanism comprises:

Second coaxial gear and the 3rd gear, this second gear be following and this idle pulley engagement in this second state;

The 4th coaxial gear and the 5th gear, the 4th gear and the 3rd gear engagement;

Coaxial this first gear and this belt pulley, this first gear and the 5th gear engagement; And

This belt is driven by this belt pulley and drives this balladeur train and move.

20. the transmission device that utilizes stored energy to reach speed changing function as claimed in claim 15, wherein said first and second resilient member are to be selected from one of group that is made up of spring and elastic rod.

21. the transmission device that utilizes stored energy to reach speed changing function as claimed in claim 15, wherein said first, second and the 3rd bolt lock mechanism are solenoid valves.

22. the transmission device that utilizes stored energy to reach speed changing function as claimed in claim 1, wherein this balladeur train is to be scan module, in order to the image of scanning document.

23. as claim 1 a described transmission device that utilizes stored energy to reach speed changing function, wherein this pedestal is to be fixed on this balladeur train, and this object is for holding the housing of this balladeur train and this transmission device.

24. the transmission device that utilizes stored energy to reach speed changing function as claimed in claim 23, wherein this variable speed driving mechanism comprises:

Driving gear is rotated by this drive power source;

Swing arm, coaxial with this driving gear, and can between corresponding to the third state of this first state and the four condition corresponding to this second state, swing;

Idle pulley is installed in this swing arm, and contacts with this driving gear;

First driving mechanism, it contacts with this idle pulley in this swing arm that is positioned at this third state, moves with this first rate in order to drive this balladeur train; And

Second driving mechanism, it contacts with this idle pulley in this swing arm that is positioned at this second state, moves with this second speed in order to drive this balladeur train.

25. the transmission device that utilizes stored energy to reach speed changing function as claimed in claim 24, wherein this first driving mechanism and this second driving mechanism have same output.

26. the transmission device that utilizes stored energy to reach speed changing function as claimed in claim 25, wherein this first driving mechanism comprises:

Coaxial first gear and belt pulley, this first gear be following and this idle pulley engagement in this first state; And

Belt is driven by this belt pulley and drives this balladeur train and move.

27. the transmission device that utilizes stored energy to reach speed changing function as claimed in claim 26, wherein this second driving mechanism comprises:

Second coaxial gear and the 3rd gear, this second gear mesh with this idle pulley under this second state;

The 4th coaxial gear and the 5th gear, the 4th gear and the 3rd gear engagement;

Coaxial this first gear and this belt pulley, this first gear and the 5th gear engagement; And

This belt is driven by this belt pulley and drives this balladeur train and move.

28. the transmission device that utilizes stored energy to reach speed changing function as claimed in claim 23, wherein this first resilient member is to be selected from one of group that is made up of spring, elastic rod.

29. the transmission device that utilizes stored energy to reach speed changing function as claimed in claim 23, wherein this first bolt lock mechanism is to be a solenoid valve.

30., more comprise as claim 23 a described transmission device that utilizes stored energy to reach speed changing function:

Second resilient member, it is fixed to this variable speed driving mechanism, and having that first release the second energy storage state that can state and release corresponding to second of this first energy storage state can state corresponding to this, this second resilient member is stored energy under this second state, and releases energy under this first state; And

Second bolt lock mechanism, it is fixed to this pedestal, and have second latch mode and second releasing orientation, in order to breech lock respectively and unclamp this variable speed driving mechanism, make this variable speed driving mechanism be in this second state and this first state respectively, this second latch mode of this second bolt lock mechanism is to make this variable speed driving mechanism be in this second state, and this second releasing orientation of this second bolt lock mechanism is to make this variable speed driving mechanism be in this first state.

31. the transmission device that utilizes stored energy to reach speed changing function as claimed in claim 30, wherein this variable speed driving mechanism comprises:

Driving gear is rotated by this drive power source;

Swing arm, coaxial with this driving gear, and can between corresponding to the third state of this first state and the four condition corresponding to this second state, swing;

Idle pulley is installed in this swing arm, and contacts with this driving gear;

First driving mechanism, it contacts with this idle pulley in this swing arm that is positioned at this third state, moves with this first rate in order to drive this balladeur train; And

Second driving mechanism, it contacts with this idle pulley in this swing arm that is positioned at this second state, moves with this second speed in order to drive this balladeur train.

32. the transmission device that utilizes stored energy to reach speed changing function as claimed in claim 31, wherein this first driving mechanism and this second driving mechanism have same output.

33. the transmission device that utilizes stored energy to reach speed changing function as claimed in claim 32, wherein this first driving mechanism comprises:

Coaxial first gear and belt pulley, this first gear be following and this idle pulley engagement in this first state; And

Belt is driven by this belt pulley and drives this balladeur train and move.

34. the transmission device that utilizes stored energy to reach speed changing function as claimed in claim 33, wherein this second driving mechanism comprises:

Second coaxial gear and the 3rd gear, this second gear be following and this idle pulley engagement in this second state;

The 4th coaxial gear and the 5th gear, the 4th gear and the 3rd gear engagement;

Coaxial this first gear and this belt pulley, this first gear and the 5th gear engagement; And

This belt is driven by this belt pulley and drives this balladeur train and move.

35. the transmission device that utilizes stored energy to reach speed changing function as claimed in claim 30, wherein respectively this first and second resilient member is to be selected from one of group that is made up of spring and elastic rod.

36. the transmission device that utilizes stored energy to reach speed changing function as claimed in claim 30, wherein respectively this first and second bolt lock mechanism is a solenoid valve.

37. the transmission device that utilizes stored energy to reach speed changing function as claimed in claim 30 more comprises:

The 3rd bolt lock mechanism, it is fixed to this pedestal, and has the 3rd latch mode and the 3rd releasing orientation, and in order to breech lock respectively and unclamp this first resilient member, making this first resilient member be in respectively that this first energy storage state and this first release can state, wherein,

When this balladeur train breaks away from this first resilient member, the 3rd bolt lock mechanism is in the 3rd latch mode, this second bolt lock mechanism is in this second releasing orientation, and this first bolt lock mechanism is in this first latch mode, uses making this variable speed driving mechanism be in this first state; And

When this balladeur train moves to the 3rd position between this primary importance and this second place, the 3rd bolt lock mechanism is in the 3rd latch mode, this second bolt lock mechanism is in this second latch mode, and this first bolt lock mechanism is in this first releasing orientation, uses to make this variable speed driving mechanism be in this second state.

38. the transmission device that utilizes stored energy to reach speed changing function as claimed in claim 37, wherein this variable speed driving mechanism comprises:

Driving gear is rotated by this drive power source;

Swing arm, coaxial with this driving gear, and can between corresponding to the third state of this first state and the four condition corresponding to this second state, swing:

Idle pulley is installed in this swing arm, and contacts with this driving gear;

First driving mechanism, it contacts with this idle pulley in this swing arm that is positioned at this third state, moves with this first rate in order to drive this balladeur train; And

Second driving mechanism, it contacts with this idle pulley in this swing arm that is positioned at this second state, moves with this second speed in order to drive this balladeur train.

39. the transmission device that utilizes stored energy to reach speed changing function as claimed in claim 38, wherein this first driving mechanism and this second driving mechanism have same output.

40. the transmission device that utilizes stored energy to reach speed changing function as claimed in claim 39, wherein this first driving mechanism comprises:

Coaxial first gear and belt pulley, this first gear be following and this idle pulley engagement in this first state; And

Belt is driven by this belt pulley and drives this balladeur train and move.

41. the transmission device that utilizes stored energy to reach speed changing function as claimed in claim 40, wherein this second driving mechanism comprises:

Second coaxial gear and the 3rd gear, this second gear be following and this idle pulley engagement in this second state;

The 4th coaxial gear and the 5th gear, the 4th gear and the 3rd gear engagement;

Coaxial this first gear and this belt pulley, this first gear and the 5th gear engagement; And

This belt is driven by this belt pulley and drives this balladeur train and move.

42. the transmission device that utilizes stored energy to reach speed changing function as claimed in claim 27, wherein respectively this first and second resilient member is to be selected from one of group that is made up of spring and elastic rod.

43. as claim 27 a described transmission device that utilizes stored energy to reach speed changing function, wherein this respectively this first, second and the 3rd bolt lock mechanism be to be a solenoid valve.

44. the transmission device that utilizes stored energy to reach speed changing function as claimed in claim 23, wherein this balladeur train is to be scan module, in order to the image of scanning document.

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