CN103994853B - Pressure gauge with adjustable sensing contact - Google Patents

Abstract

The invention discloses an adjustable induction contact pressure gauge, which is characterized in that a scale panel is arranged in a meter shell, a pointer which is connected with a Bourdon tube, penetrates out of the scale panel and is provided with a magnetic part, and a first substrate which is pivoted on the back of the scale panel. Wherein the first substrate is provided with a first slot-shaped through hole at the pivot end for accommodating a first magnetic sensor. According to the structure, a user can adjust the position of the first magnetic sensor at any time according to the control requirement. And the first magnetic sensor can be ensured to be tightly attached to the scale panel, so that the magnetic part of the pointer can be effectively sensed by the first magnetic sensor when being overlapped with the first magnetic sensor.

Description

Pressure gauge with adjustable sensing contact

technical field

The invention relates to a measuring device, in particular to a pressure gauge with an adjustable sensing contact which can adjust the sensing position.

Background technique

The pointer-type pressure gauges in the prior art usually only have the function of displaying scale values, and cannot be electrically connected with the corresponding control system to provide the data of the pressure gauge. For this reason, there was an invention patent case such as Taiwan Patent Publication No. I310083 "Pressure Gauge Brush Type Inductive Switch Structure". Its structure is to set at least one induction switch between the scale panel and the pointer. The induction switch includes a brush seat, a displacement seat and a magnetic part, wherein the displacement seat slides relative to the brush seat on the bottom surface of the scale panel, and the displacement A plurality of wires are connected between the holder and the brush holder, and a magnetic reed switch that can conduct the above-mentioned wires is provided on the displacement base, and the magnetic reed switch is opened and closed by the magnetic part of the pointer. Through the above design, it is easy to use The value of the predetermined action can be set by moving the displacement seat in advance. When the pointer of the pressure gauge moves to the position corresponding to the displacement seat, the magnetic part can be used to make the magnetic reed switch conduct the above-mentioned wire, and transmit the signal to provide the control system as a reference.

However, although the above-mentioned technical solutions in the prior art can move and adjust the position of the reed tube relative to the scale panel, there are still many defects in its structure:

1. In the prior art, the displacement seat and the brush seat are connected by wires, and each wire is a combination of multiple copper sheets, and the copper sheets are prone to oxidation and corrosion due to the environment, resulting in short circuit or open circuit resulting in false signals.

2. In the prior art, the displacement seat and the brush seat are connected by copper sheets. If a certain copper sheet is damaged for some reason, the maintenance cost is high and difficult. In addition, the large-area copper sheet is not only cumbersome in the production process, but also causes waste of copper sheet material for wires.

3. In the prior art, the brush holder and each copper piece are in movable contact connection, so there is a contact gap between the contacts, and there is a hidden danger of sparks during electrical conduction.

4. The reed switch in the prior art is opened and closed by sensing the magnetic part on the pointer. The magnetic force strength of the magnetic part on the pointer will affect whether the reed switch can move. However, the magnetic parts in the prior art except In addition to the isolation of the scale panel, it is further isolated by the displacement seat, resulting in poor induction of the reed switch due to excessive spacing.

Contents of the invention

In view of the above-mentioned problems and defects in the prior art, the main purpose of the present invention is to provide a pressure gauge with adjustable sensing contacts.

In order to achieve the purpose of the above invention, a pressure gauge with adjustable inductive contacts is proposed, which is equipped with a scale panel in a watch case, a Bourdon tube connected to the axis hole of the scale panel and a magnetic piece The pointer and at least one first substrate pivotally arranged on the back of the scale panel. Wherein, one end of the first base plate is provided with a first pivot hole corresponding to the shaft hole, and a pivot piece is used to pivot the first base plate on the back of the scale panel. In addition, the other end of the first base plate, which is different from the first pivot hole, is provided with a first slot-shaped through hole through the first base plate, and a first magnetic sensor is accommodated by the first slot-shaped through hole. With this structure, the user can adjust the position of the first magnetic sensor at any time according to the control requirements, and then change the value controlled by it. And ensure that the first magnetic sensor can be closely attached to the back of the scale panel, so that when the magnetic part on the pointer overlaps with the first magnetic sensor, it can be effectively sensed by the first magnetic sensor.

Based on the above, in the pressure gauge with adjustable sensing contacts of the present invention, the first substrate is tightly pivoted to the back of the scale panel, so that the first magnetic sensor and the pointer are only separated from the scale panel, so as to ensure that the first magnetic sensor can Accurately sense the magnetism of the pointer. Moreover, the convenience of moving and adjusting the first magnetic sensor and the safety of electrical action can be achieved through the first substrate.

Description of drawings

FIG. 1 is a schematic diagram of a first embodiment of a pressure gauge with adjustable sensing contacts according to the present invention.

FIG. 2 is an exploded view of the first embodiment of the pressure gauge with adjustable sensing contacts according to the present invention.

Fig. 3 is a top view of the first embodiment of the pressure gauge with adjustable sensing contacts of the present invention.

Fig. 4 is a schematic cross-sectional view of Fig. 3 of the pressure gauge with adjustable sensing contacts of the present invention.

FIG. 5 is a schematic diagram of a second substrate embodiment of the pressure gauge with adjustable sensing contacts of the present invention.

FIG. 6 is a schematic diagram of the combination of the first and second substrates of the pressure gauge with adjustable sensing contacts of the present invention.

Fig. 7 is a top view of the second embodiment of the pressure gauge with adjustable sensing contacts of the present invention.

Fig. 8 is a schematic cross-sectional view of Fig. 7 of the pressure gauge with adjustable sensing contacts of the present invention.

1: Case 33: The first lever

2: scale panel 331: first indicating arrow

21: Shaft hole 4: Second base plate

22: pointer 41: second pivot hole

221: Magnetic piece 42: Second slot-shaped through hole

3: first substrate 421: second magnetic sensor

31: the first pivot hole 422: the first electrical contact

32: the first slot-shaped through hole 423: the second electrical contact

321: first magnetic sensor 424: wire

322: the first electrical circuit 43: the second lever

323: second electric circuit 431: second indicating arrow

324: First Signal Line 44: Class

325: Second signal line A: Pivot piece

detailed description

Embodiments of the pressure gauge with adjustable sensing contacts of the present invention will be further described below. Please refer to the relevant drawings and descriptions. In order to facilitate the understanding of the embodiments of the present invention, the same components are described below with the same symbols.

As shown in Figures 1 to 4. In the figure, a pressure gauge with adjustable sensing contacts is attached to a watch case 1 with a scale panel 2, one is connected to a Bourdon tube (not shown in the figure) and passes through the axis hole 21 of the scale panel 2 and has a The pointer 22 of the magnetic member 221 and at least one first substrate 3 pivotally arranged on the back 22 of the scale panel 2 .

One end of the above-mentioned first base plate 3 is provided with a first pivot hole 31 corresponding to the axis hole 21 of the scale panel 2, and a pivot piece A passes through the axis hole 21 and the first pivot hole 31, and the first base plate 3 Pivoted on the back of the scale panel 2 . In addition, the other end of the first substrate 3 that is different from the first pivot hole 31 is provided with a first groove-shaped through hole 32 through the first substrate 3, providing the accommodation of the first magnetic sensor 321, and the first groove-shaped through hole 32 First and second electrical circuits 322 and 323 are respectively extended toward the first pivot hole 31 at the two ends. One end of the first and second electrical lines 322 and 323 is electrically connected to the first magnetic sensor 321 , and the other end is electrically connected to the first and second signal lines 324 and 325 . A first driving rod 33 is extended on the side edge of the first slot-shaped through hole 32 of the first substrate 3, and one end of the first driving rod 33 is extended to the scale surface 23 of the scale panel 2 and a first driving rod 33 is provided. Arrow 331 is indicated.

The above-mentioned first magnetic sensor 321 is a reed switch, and senses the magnetic element 221 on the pointer 22 to conduct.

With the composition of the above components, when implementing a single-contact pressure gauge, the first base plate 3 is rotatably pivoted on the back 22 of the scale panel 2, and the user can adjust the first magnetic sensor 321 at any time according to the control requirements. position, and then change its control value. And move the first lever 33 to a predetermined position on the scale panel 2 of the pressure gauge according to the control value.

When the Bourdon tube in the case 1 is under pressure, the pointer 22 swings, and the pointer 22 swings at the position of the scale surface 23 of the scale panel 2 to provide the user with a visual indication of the current pressure. When the magnetic part 221 on the pointer 22 overlaps with the first magnetic sensor 321, the first magnetic sensor 321 is triggered by the magnetic force of the magnetic part 221 to form a conduction, so that the first and second electrical lines 322, 323 and the first The first and second signal lines 324 and 325 form electrical conduction, and the first and second signal lines 324 and 325 transmit conduction signals to the control system or device (not shown in the figure) connected to the rear end for use.

As shown in Figures 5 to 8, it is another embodiment of the first substrate of the pressure gauge with adjustable sensing contacts of the present invention. In the figure, the second base plate 4 is provided with a second pivot hole 41 corresponding to the shaft hole 21 of the scale panel 2 at one end, and a second pivot hole 41 is provided through the second base plate 4 at the other end different from the second pivot hole 41 . The second slot-shaped through hole 42 is used to accommodate a second magnetic sensor 421 , and the two ends of the second slot-shaped through hole 42 are respectively provided with first and second electrical contacts 422 , 423 . A second driving rod 43 is extended on the side edge of the second groove-shaped through hole 42 of the second substrate 4, so that one end of the second driving rod 43 extends to the scale surface 23 of the scale panel 2 and a second indicating arrow is provided. 431.

Between the second slot-shaped through hole 42 of the second substrate 4 and the second pivot hole 41, a step 44 with a height difference is further formed, so that the second pivot hole 41 is relatively taller than the second slot-shaped through hole 42. high.

The above-mentioned first magnetic sensor 421 is a reed switch, and its two ends are electrically connected with one and two electrical contacts 422, 423 respectively, and sense the magnetic piece 221 on the pointer 22 to conduct.

When a double-contact pressure gauge is implemented by combining the first and second base plates 3 and 4 . The first and second base boards 3 and 4 are matched with a pivot member A through the shaft hole 21 and the first and second pivot holes 31 and 41, and the first and second base boards 3 and 4 are pivotally arranged on the back surface 22 of the scale panel 2 . The second substrate 4 is stacked on the first substrate 3 , and the height difference of the steps 44 is used to eliminate the height difference caused by overlapping, so that the second groove-shaped through hole 42 can still be attached to the scale panel 2 . In addition, the first electrical contact 422 of the second substrate 4 is electrically connected with the first electrical circuit 322 of the first substrate 3 with a wire 424, and the second electrical contact 423 of the second substrate 4 is connected with a third signal line 425. Electrical connections. When the double-contact pressure gauge is connected to the control system (not shown), the second signal line 325 of the first substrate 3 is electrically connected to a common line of the control system, and the first signal line 324 is connected to the control system. One upper limit line of the control system is electrically connected, and the third signal line 425 is electrically connected with one lower limit line of the control system.

In this way, the user can adjust the first and second magnetic sensors 321, 421 at any time according to the actual control requirements, and then change their control values. Move the first and second levers 33 and 43 to predetermined positions on the scale panel 2 of the pressure gauge according to the upper and lower limit values to complete the setting of the first and second magnetic sensors 321 and 421 . When the pointer 22 is moved by the deformation of the Bourdon tube, and the magnetic member 221 on the pointer 22 overlaps with the first or second magnetic sensor 321, 421 on the first and second substrates 3, 4, the first or second magnetic The sensors 321, 421 are turned on due to sensing the magnetic part 221, and then the upper limit line is turned on or the lower limit line is turned on, and the first, second and third signal lines 322, 323, 425 can transmit the conduction signal to the control system , to perform subsequent actions such as corresponding switches or alarms.

Claims (9)

1. A pressure gauge with adjustable sensing contacts, comprising: A watch case, which is provided with a scale panel, a pointer connected to the Bourdon tube and passing through a shaft hole of the scale panel, and the pointer has a magnetic part; A first base plate, one end is provided with a first pivot hole corresponding to the shaft hole, and a pivot piece is used to pivot the first base plate on the back of the scale panel. In addition, the first base plate is different from the The other end of the first pivot hole is provided with a first slot-shaped through hole through the first base plate, and the first slot-shaped through hole is closely attached to the scale panel; and A first magnetic sensor, accommodated in the first slot-shaped through hole, is characterized in that: the first substrate is provided with a first lever extending from the side edge of the first slot-shaped through hole, and the first One end of a driving lever extends to a scale surface of the scale panel. 2. The pressure gauge with adjustable sensing contacts as claimed in claim 1, wherein one end of the first lever is further provided with a first indicating arrow. 3. The pressure gauge with adjustable sensing contacts as claimed in claim 1, wherein said first magnetic sensor is a reed switch. 4. A pressure gauge with adjustable sensing contacts, comprising: A watch case, which is provided with a scale panel, a pointer connected to the Bourdon tube and passing through a shaft hole of the scale panel, and the pointer has a magnetic part; A first base plate, one end is provided with a first pivot hole corresponding to the shaft hole, and the other end different from the first pivot hole is provided with a first slot-shaped through hole through the first base plate, and The first groove-shaped through-hole is closely attached to the scale panel; A second base plate, one end is provided with a second pivot hole corresponding to the shaft hole, the other end of the different second pivot hole is provided with a second groove-shaped through hole through the second base plate, and the The second base plate forms a step with a height difference between the second groove-shaped through hole and the second pivot hole, and cooperates with a pivot piece to pass through the shaft hole, the first and the second pivot hole. , the second substrate is stacked on the first substrate, and pivotally arranged on the back of the scale panel, so that the first and second slot-shaped through holes and the scale panel are in a close fit state; a first magnetic sensor accommodated in the first slot-shaped through hole; and A second magnetic sensor is accommodated in the second slot-shaped through hole. 5. The pressure gauge with adjustable sensing contacts as claimed in claim 4, wherein said first substrate is provided with a first lever extending from the side edge of said first groove-shaped through hole, and makes said first One end of the driving lever extends to a scale surface of the scale panel. 6. The pressure gauge with adjustable sensing contacts as claimed in claim 5, wherein one end of the first lever is further provided with a first indicating arrow. 7. The pressure gauge with adjustable sensing contacts as claimed in claim 4, wherein said second substrate is provided with a second lever extending from the side edge of said second groove-shaped through hole, and said second One end of the driving lever extends to a scale surface of the scale panel. 8. The pressure gauge with adjustable sensing contacts as claimed in claim 7, wherein a second indicator arrow is further provided at one end of the second lever. 9. The pressure gauge with adjustable sensing contacts as claimed in claim 4, wherein said first and second magnetic sensors are a reed switch.