CN1477442A - Height adjusting system of projector - Google Patents

Abstract

The invention provides a latch mechanism, which comprises an opening surface through which a threaded rod can pass. One half of the aperture surface is smooth surfaced and secured to a housing, while the other half is threaded and is formed by an internal module that slides within the housing. The inner module is urged toward the fixed portion of the aperture face by a spring. The invention provides a design of a button capable of quickly adjusting height, which is convenient for a user to loosen a height adjusting rod by pressing down the button easily, roughly adjust the height of the front edge of a projector and a projection angle, and stably clamp the height adjusting rod when the button is released, so that the front edge of the projector is fixed at a specific position, and at the moment, the height adjusting rod can be further rotated to finely adjust the projection angle.

Description

Projector Height Adjustment System

technical field

The invention relates to a height adjustment system, in particular to a height adjustment system which is applied in the field of projectors and can perform rapid rough adjustment and fine adjustment for a support foot.

Background technique

Please refer to FIG. 1 , which shows a conventional projector 10 . The projector 10 is placed flat on a flat surface 12 , such as a flat desktop, and projects images onto a screen 14 . Since the height of the screen 14 relative to the projector 10 may vary, the projector 10 is generally provided with a set of tilt adjustment systems 18 for adjusting the projection angle θ of the projector 10 . to adjust the position of the image projected onto the screen 14 .

Please refer to FIG. 2 , which shows a front view of the tilt adjustment system 18 of the projector 10 in FIG. 1 . The existing tilt adjustment system 18 has two legs 18L, each leg 18L has a threaded support rod 18R, a foot 18F, and a corresponding bolt 18B. Threaded support rod 18R bolts directly into bolt 18B. By twisting the threaded support rod 18R, for example via the foot 18F, the distance d between the foot 18F and the bolt 18B can be changed, thereby changing the height of the front end of the projector 10 and the projection angle θ.

Although the existing tilt adjustment system 18 is simple in design, it is extremely inconvenient for users. Therefore, it is often necessary to switch many turns of the threaded support rod 18R to make the front end of the projector 10 reach the desired tilt position. Therefore, the existing height adjustment mechanism of the projector 10 is time-consuming and labor-intensive in practical application, and it is really necessary to improve it.

Contents of the invention

The purpose of the present invention is to provide a height adjustment system, which is mainly used in devices such as projectors, which not only provides convenience in height adjustment and use, but also provides stable mechanical support.

The object of the present invention is achieved by providing a latch mechanism used in a height adjustment system, comprising: a first housing, which includes: a bottom surface with a central opening for a height adjustment The rod passes through; a pillar is arranged on the bottom surface close to the central opening, and a support surface is formed along the periphery of the central opening to be consistent with the rod surface of the height adjustment rod, to support the height adjustment rod; a first the surface and the second surface are respectively arranged on the first edge and the second edge of the first casing; and a third surface is arranged on the third edge of the first casing; an internal module is slidable Set in the first housing in a manner, the internal module includes: a central part with a first opening, and the pillar is arranged in the first opening, and the supporting surface of the pillar faces the first a contact surface of the opening; a first ear portion and a second ear portion respectively extending from the first edge and the second edge of the central portion and respectively disposed on a first surface and a second surface; and a The third ear extends from the third edge of the central part and is arranged on a third surface; a second shell can be fixedly connected to the first shell and cover at least part of the center part, the second housing has a central opening corresponding to the central opening of the first housing; wherein when the central part is in a first position, the contact surface of the first opening presses against the height adjustment rod , making the height adjustment rod against the arc-shaped support surface, and locking the height adjustment rod in a fixed position, and when the central part is in a second position, the contact surface of the first opening can be in contact with the The support surface is separated, so that the height adjusting rod slides between the contact surface and the support surface.

The present invention also provides a height adjustment system, comprising: a height adjustment rod for supporting a device; a first housing, which includes: a bottom surface with a central opening for the height adjustment rod to pass through; A pillar is arranged on the bottom surface close to the central opening, and forms a support surface along the periphery of the central opening, which is consistent with the surface of the height adjustment rod, to support the height adjustment rod; a first surface and a second surface Two surfaces are respectively arranged on the first edge and the second edge of the first casing; and a third surface is arranged on the third edge of the first casing; an internal module is arranged in a slidable manner In the first housing, the internal module includes: a central part with a first opening, and the pillar is disposed in the first opening, and the support surface of the pillar faces the first opening a contact surface; a first ear portion and a second ear portion extending from the first edge and the second edge of the central portion respectively, and respectively disposed on a first surface and a second surface; and a third ear part, extending from the third edge of the central part, and set on a third surface; a second shell, which can be fixedly connected to the first shell, and at least partly covers the central part, the The second housing has a central opening corresponding to the central opening of the first housing, and the height adjustment rod also passes through the central opening of the second housing; wherein when the central part is in a first position, the The contact surface of the first opening is pressed against the height adjustment rod, so that the height adjustment rod is pressed against the arc-shaped support surface, and the height adjustment rod is locked in a fixed position, and when the central part is in a second position At this time, the contact surface of the first opening can be separated from the support surface, so that the height adjustment rod slides between the contact surface and the support surface.

Briefly, the latch mechanism of the present invention is used in a height adjustment system. The latch mechanism includes a first casing, an internal module and a second casing. The first casing has a first edge, a second edge, a third edge, and a fourth edge. The internal module is slidably placed in the first casing. A central portion of the inner module has a first opening through which a height adjusting rod passes. The internal module can slide back and forth in the first casing. The spring disposed between the fourth edge and the central part of the inner module provides a pushing force to push the inner module toward the third edge. When the spring pushes the inner module towards the third edge, the mechanical action between the inner module and the height adjustment lever locks the height adjustment lever in a fixed position.

The central portion has a first ear portion and a second ear portion, and the inner module is raised up so that the inner module is not in contact with the bottom surface of the first casing. The central portion further includes a third ear portion forming a button. In addition, the central part further includes a fourth ear, and the spring is wound on the fourth ear. The function of the button is to counteract the active force of the spring. When the button is pressed, the internal module is pushed to the fourth edge, so that the height adjustment rod is out of the original engagement state formed with the internal module, and the The height adjustment rod can therefore slide freely through the first opening.

Because the latch mechanism of the present invention provides a button design for quick height adjustment, it is convenient for the user to easily press the button, loosen the height adjustment lever, and roughly adjust the height of the front edge of the projector and the projection angle of the projector, and When the button is released, firmly clamp the height adjustment lever to hold the front edge of the projector in place, at which point the height adjustment lever can be further rotated to fine-tune the projection angle.

Description of drawings

Fig. 1 is an existing projector;

Fig. 2 is a front view of the tilt adjustment system of the projector in Fig. 1;

3 is a front view of a projector utilizing the height adjustment system of the present invention;

Figure 4 is a side perspective view of the height adjustment system;

Fig. 5 is a schematic diagram of the internal structure of the latch mechanism in Fig. 4 after the second housing is removed;

Fig. 6 is a top view of the internal configuration of the first housing;

FIG. 7 is a schematic perspective view of the internal structure of the first housing in FIG. 6 after adding a latch mechanism;

Fig. 8 is a schematic diagram of another embodiment of the present invention.

Detailed ways

Please refer to FIG. 3 , which shows a front view of the projector 20 using the height adjustment system 30 of the present invention. As shown in FIG. 3 , the height adjustment system 30 includes a height adjustment rod 40 and a latching mechanism 50 . The height adjustment rod 40 passes through the latch mechanism 50 , and through the mechanical action between the height adjustment rod 40 and the latch mechanism 50 , the height adjustment rod 40 is firmly locked at a predetermined position of the latch mechanism 50 . And when the user presses a button 50B, the height adjusting rod 40 is disengaged from the latch mechanism 50 and slides freely through the latch mechanism 50 . In this way, the distance D between the foot 42 of the height adjustment rod 40 and the lower edge surface 22 of the projector 20 can be adjusted freely, thereby adjusting the projection angle of the projector. Incidentally, the foot 42 may have a soft bottom surface with strong grip, such as soft rubber, so as to avoid scratching the surface on which the projector 20 is placed and prevent the projector 20 from sliding.

Please refer to FIG. 4 , which shows a side perspective view of the height adjustment system 30 . The latch mechanism 50 includes a second housing 57 locked to a corresponding first housing 58 in a snap mechanism. When combined, the first shell 58 and the second shell 57 jointly form a first opening 51 (in FIG. 4 , it is not obvious due to the angle), a second opening 52 , and a third opening 53 . The button 50B protrudes from the third opening 53 .

Please refer to FIG. 5 , which shows a schematic view of the internal structure of the latch mechanism 50 in FIG. 4 after the second housing 57 is removed. The first shell 57 has a first edge 58F, a second edge 58S, a third edge 58T, and a fourth edge 58R. An internal module 60 is slidably disposed within the first housing 58 . A central portion 62 of an inner module 60 has a first opening 64 , and the height adjusting rod 40 passes through the first opening 64 . The internal module 60 can slide forward and backward in the first casing 58 as shown by the arrow FB in FIG. 5 . The spring 90 disposed between the fourth edge 58R and the central portion 62 of the inner module 60 provides a pushing force to push the inner module 60 toward the third edge 58T. When the spring 90 pushes the inner module 60 toward the third edge 58T, the mechanical action between the inner module 60 and the height adjustment rod 40 locks the height adjustment rod 40 in a fixed position. The function of the button 50B is to counteract the active force of the spring 90. When the button 50B is pressed, the internal module 60 is pushed to the fourth edge 58R, so that the height adjustment rod 40 is out of the engagement state formed with the internal module 60, The height adjusting rod 40 can therefore freely slide through the first opening 64 . The first housing 58 has a tenon 58N, which can engage with the corresponding hook 57H on the second housing 57 , so that the first housing 58 and the second housing 57 can be firmly locked. In addition, the first housing 58 has a locking portion 58M for fixing the latch mechanism 50 on a device such as a projector.

Please refer to FIG. 6 , which shows a top view of the internal configuration of the first housing 58 . As shown in FIG. 6 , the first housing 58 has a bottom surface 58B with a central opening 58C for receiving the height adjustment rod 40 therethrough. The aperture size of the central opening 58C should be designed to just allow the height adjustment rod 40 to slide freely through the central opening 58C. A pillar 59 is provided on the bottom surface 58B near the central opening 8C, and has an arc-shaped supporting surface 59B. The arcuate support surface 59B cooperates with the face of the height adjustment rod 40 and is formed along the periphery of the central opening 58C. The arc-shaped supporting surface 59B is a smooth plane, and when the height adjusting rod 40 passes through the central opening 58C, it mainly moves freely by adhering to the arc-shaped supporting surface 59B. The curved support surface 59B is suggested to be made of hard, smooth plastic, such as industry standard nylon 66 plastic, as a material. The first housing 58 has a first surface 59F on a first edge 58F, and a similar second surface 59S on a second edge 58S, wherein the first surface 59F and the second surface 59S can be aligned with the second shell After the body 57 is combined, it forms the first openings 51 and 52 with the opposite surface on the second housing 57 . Likewise, a third surface 59T on the third edge 58T can form the third opening 53 after the first casing 58 and the second casing 57 are combined.

Please refer to FIG. 7 . FIG. 7 shows a schematic perspective view of the internal structure of the first housing 58 in FIG. 6 after adding the latch mechanism 50 . As mentioned above, the internal module 60 is slidably disposed in the first housing 58 . The strut 59 passes through the first opening 64 in the central portion 62 of the inner module 60 . The shape of the central opening 64 is designed to be consistent with the strut 59 and the height adjustment rod 40 to prevent the inner module 60 from shaking in the latch mechanism 50 and act as a restraining tool to prevent the inner module 60 from moving too much toward the fourth edge 58R. Another more important technical feature of the internal module 60 is the contact surface 60B belonging to the inner surface of the first opening 64 as shown in FIG. 7 . The contact surface 60B has a thread similar to that of the height adjustment rod 40 and conforms to the curvature of the face of the height adjustment rod 40 . The contact surface 60B and the arc-shaped support surface 59B jointly surround the height adjustment rod 40 , and the contact surface 60B is pushed toward the third edge 58T by the thrust of the spring 90 , so the contact surface 60B can clamp the height adjustment rod 40 . When the height adjustment rod 40 is clamped between the threaded contact surface 60B and the smooth arc-shaped support surface 59B, the threaded rod surface of the height adjustment rod 40 is engaged with the threaded contact surface 60B, so that the height adjustment rod 40 is firmly bolted to the fixed position. In this state, the distance D between the projector 20 and the foot 42 can still be fine-tuned by turning the height adjustment lever 40 counterclockwise or clockwise.

On the other hand, when the button 58B is depressed, the spring 90 is thus forced to slide the inner module 60 towards the fourth edge 5R, and the threaded contact surface 60B is thus disengaged from the height adjustment rod 40 so that the height adjustment rod 40 is no longer in threaded contact. The joint limitation of surface 60B and smooth arcuate support surface 59B. In this way, the threaded surface of the height adjusting rod 40 can slide freely in the opening 58C. The second housing 57 also has a central opening 57C for allowing the height adjustment rod 40 to pass through. It should be emphasized that only the contact surface 60B is threaded, while the support surface 59B is not threaded. Only in this way can the height adjustment lever 40 slide freely up and down when the button 50B is pressed. During action, the central part 62 of the inner module 60 can have two obvious positions: the first position 50L is the state where the inner module 60 is pushed toward the third edge 58T so that the contact surface 60B clamps the height adjustment rod 40; The position 50U is a state where the inner module 60 is pushed toward the fourth edge 58R to release the contact surface 60B from the height adjustment rod 40 .

In addition, the central part 62 of the central module 60 has a first ear portion 66F and a second ear portion 66S, wherein the first ear portion 66F extends from the first edge 66F and is disposed in the hole formed by the first surface 59F, and the second ear portion 66F extends out from the first edge 66F and is disposed in the hole formed by the first surface 59F. The ear portion 66S extends from the second edge 60S and is disposed in the hole formed by the second surface 59S. The first ear 66F and the second ear 66S are also important for smooth operation of the latch mechanism 50 within the first housing 58 . The first ear portion 66F and the second ear portion 66S support the internal module 60 so that the internal module 60 does not actually contact the bottom surface 58B of the first housing 58 . Therefore, when the internal module 60 slides in the first housing 58 , the frictional force can be minimized, so that the user can feel less effort and comfort when operating the latch mechanism 50 of the present invention. Of course, the positions corresponding to the first surface 59F and the second surface 59S on the second housing 57 also have consistent surfaces that move with the first ear 66F and the second ear 66S, which also prevents the central part 62 of the internal module 60 from In contact with a large area of the second housing 57 . The central portion 62 further includes a third ear portion 66T extending outward from the third opening 53 to form the button 50B. Ideally, the third ear portion 66T is not in contact with the surface constituting the third opening 53 . In addition, the central portion 62 further includes a fourth ear portion 66R extending outward toward the fourth edge 60R of the central portion 62 and disposed on the fourth surface 59R of the first casing 58 . The spring 90 is wound on the fourth ear portion 66R.

Please refer to FIG. 8 , which is a schematic diagram of another embodiment of the present invention, showing that the latch mechanism 50 of the present invention does not have to be installed outside the projector. In FIG. 8 , the latch mechanism 50 is built into the housing 92 of the projector 100 . The button 50B is extended from the housing 92 to facilitate the user to quickly adjust the height H of the foot 94 . It should be noted in this design that the height adjustment rod 40 must therefore pass through the upper and lower parts of the housing 92 .

Compared with the prior art, the latch mechanism of the present invention provides a button design for quick height adjustment, which is convenient for the user to release the height adjustment lever by easily pressing the button, and roughly adjust the height of the front edge of the projector and the projection angle. And when the button is released, firmly clamp the height adjustment lever so that the front edge of the projector is fixed at a specific position, at this time the height adjustment lever can be further rotated to fine-tune the projection angle.

The above descriptions are only preferred embodiments of the present invention, and all equivalent changes and modifications made according to the claims of the present invention should fall within the scope of the patent of the present invention.

Claims (18)

1. bolt lock mechanism that is used for height adjustment system includes:

One first housing, it includes:

One bottom surface has a central opening and is used for allowing a height adjusting link pass through;

One pillar is arranged on this bottom surface near this central opening place, and it is consistent with the pole face of this height adjusting link to be formed with a supporting surface along the periphery of this central opening, in order to support this height adjusting link;

One first surface and second surface are arranged at respectively on first edge and second edge of this first housing; And

One the 3rd surface is arranged on the 3rd edge of this first housing;

One internal module slidably is arranged in this first housing, and this internal module includes:

One centre have one first perforate, and this pillar is arranged in this first perforate, and this supporting surface of this pillar is towards a surface of contact of this first perforate;

One first ear and second ear, first edge and second edge by this centre extends out respectively, and is arranged at respectively on a first surface and the second surface; And

One third ear portion is extended out by the 3rd edge in this centre, and is arranged on one the 3rd surface;

One second housing can be fixed on this first housing, and this centre of covered section at least, and this second housing has the central opening that a central opening corresponds to this first housing;

Wherein when this centre is in a primary importance, this surface of contact of this first perforate is pressed to this height adjusting link, make this height adjusting link prop up this arc supporting surface, and this height adjusting link is stuck in a fixed position, and when this centre is in a second place, this surface of contact of this first perforate can separate with this supporting surface, and makes this height adjusting link slide between this surface of contact and this supporting surface.

2. bolt lock mechanism as claimed in claim 1, wherein this bolt lock mechanism includes a flexible member in addition, so that this centre is promoted towards this primary importance.

3. bolt lock mechanism as claimed in claim 2, wherein this third ear portion constitutes a button, can promote this centre and move towards this second place, to unclamp this height adjusting link.

4. bolt lock mechanism as claimed in claim 1, wherein this surface of contact and this supporting surface all are the arc consistent with this height adjusting link pole face, and this surface of contact and this supporting surface both one of have a flank of thread, again wherein when this centre is in a primary importance, one corresponding flank of thread effect of this flank of thread and this height adjusting link, and this height adjusting link is vised in a fixed position.

5. bolt lock mechanism as claimed in claim 4, wherein this supporting surface is a shiny surface, and this surface of contact is a flank of thread, and this supporting surface is made of nylon 66.

6. bolt lock mechanism as claimed in claim 1 wherein includes a first surface, a second surface and one the 3rd surface on this second housing, correspond to this first, second and third surface of this first housing respectively.

7. bolt lock mechanism as claimed in claim 6, wherein this first surface of this first housing and this second housing, second surface and the 3rd surface all are cambered surface, form one first opening, one second opening and one the 3rd opening thus respectively.

8. bolt lock mechanism as claimed in claim 1, wherein this supporting surface directly is arranged at the position with respect to this surface of contact.

9. bolt lock mechanism as claimed in claim 1, wherein this first ear and this second ear respectively with this first surface and this second surface effect of this first housing, avoided this centre to contact with this bottom surface of this first housing.

10. height adjustment system includes:

One height adjusting link is in order to support a device;

One first housing, it includes:

One bottom surface has a central opening and is used for allowing this height adjusting link pass through;

One pillar is arranged on this bottom surface near this central opening place, and it is consistent with the pole face of this height adjusting link to be formed with a supporting surface along the periphery of this central opening, in order to support this height adjusting link;

One first surface and second surface are arranged at respectively on first edge and second edge of this first housing; And

One the 3rd surface is arranged on the 3rd edge of this first housing;

One internal module slidably is arranged in this first housing, and this internal module includes:

One centre have one first perforate, and this pillar is arranged in this first perforate, and this supporting surface of this pillar is towards a surface of contact of this first perforate;

One first ear and second ear, first edge and second edge by this centre extends out respectively, and is arranged at respectively on a first surface and the second surface; And

One third ear portion is extended out by the 3rd edge in this centre, and is arranged on one the 3rd surface;

One second housing can be fixed on this first housing, and this centre of covered section at least, and this second housing has the central opening that a central opening corresponds to this first housing, and this height adjusting link also passes the central opening of this second housing;

Wherein when this centre is in a primary importance, this surface of contact of this first perforate is pressed to this height adjusting link, make this height adjusting link prop up this arc supporting surface, and this height adjusting link is stuck in a fixed position, and when this centre is in a second place, this surface of contact of this first perforate can separate with this supporting surface, and makes this height adjusting link slide between this surface of contact and this supporting surface.

11. height adjustment system as claimed in claim 10, wherein this height adjustment system includes a flexible member in addition, so that this centre is promoted towards this primary importance.

12. height adjustment system as claimed in claim 11, wherein this third ear portion constitutes a button, can promote this centre and move towards this second place, to unclamp this height adjusting link.

13. height adjustment system as claimed in claim 10, wherein this surface of contact and this supporting surface all are the arc consistent with this height adjusting link pole face, and this surface of contact and this supporting surface both one of have a flank of thread, again wherein when this centre is in a primary importance, one corresponding flank of thread driving fit of this flank of thread and this height adjusting link, and vise this height adjusting link in a fixed position.

14. height adjustment system as claimed in claim 13, wherein this supporting surface is a shiny surface, and this surface of contact is a flank of thread, and this supporting surface is made of nylon 66.

15. height adjustment system as claimed in claim 10 wherein includes a first surface, a second surface and one the 3rd surface on this second housing, correspond to this first, second and third surface of this first housing respectively.

16. height adjustment system as claimed in claim 15, wherein this first surface of this first housing and this second housing, second surface and the 3rd surface all are cambered surface, form one first opening, one second opening and one the 3rd opening thus respectively.

17. height adjustment system as claimed in claim 10, wherein this supporting surface directly is arranged at the position with respect to this surface of contact.

18. height adjustment system as claimed in claim 10, wherein this first ear and this second ear respectively with this first surface and this second surface effect of this first housing, avoided this centre to contact with this bottom surface of this first housing.

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