CN212275128U

CN212275128U - Microswitch type electric contact pressure gauge

Info

Publication number: CN212275128U
Application number: CN202021579336.5U
Authority: CN
Inventors: 周春龙; 温金建; 赵万水; 杨忠康; 胡小燕
Original assignee: Hongqi Meter Co ltd
Current assignee: Hongqi Meter Co ltd
Priority date: 2020-08-03
Filing date: 2020-08-03
Publication date: 2021-01-01
Anticipated expiration: 2030-08-03

Abstract

The utility model discloses a micro-gap switch type electric contact pressure gauge, which relates to the pressure gauge field and comprises a meter shell provided with a triangular base, wherein an indicating part is arranged on the triangular base, and two adjusting parts are arranged on the triangular base positioned at one end of the indicating part; a label part is arranged on the watch case, a pointer part is arranged at the center of the label part in a penetrating way, and scales are arranged on the edge of the upper surface of the label part; the adjusting part is connected with an adjusting rod, the adjusting rod is connected with a knob after penetrating through the label part, and the label part at the knob is provided with adjusting scales; the upper surface of the watch case is hermetically connected with a transparent watch cover; a connector is arranged on the side wall of the watchcase, a shunt pipe is arranged in the connector, and the shunt pipe is respectively communicated with the indicating part and the adjusting part; the shell on one side of the joint is provided with a junction box, and a lead is arranged in the junction box. The utility model discloses the manometer is capacious, the signal is sensitive, the precision is high, set up convenient directly perceived, long service life to make equipment operation can obtain more accurate reliable control.

Description

Microswitch type electric contact pressure gauge

Technical Field

The utility model relates to a manometer technical field especially relates to a micro-gap switch formula electric contact pressure gauge.

Background

When the pressure to be measured is applied to the spring tube, the tail end of the spring tube produces corresponding elastic deformation-displacement, and the elastic deformation-displacement is amplified by a transmission mechanism and indicated on a dial by an indicating device. At the same time, the pointer drives the movable contact of the electric contact device to contact with the contact (upper and lower limits) of the set pointer, so that the control system is switched on or off to achieve the purposes of automatic control and signal sending and alarming. However, the indicating device driven by the end force of the spring pipe and the action force of the hairspring of the machine core part drives the upper and lower limit movable needles of the contact head, the traction force is small, and under the working condition of environmental vibration or pressure pulsation, the indicating needle is easy to operate and swing too much, so that the defects of insensitive contacts such as easy ignition, arcing, frequent on-off and the like are easily caused, and the contact device has small capacity and short service life.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a micro-gap switch formula electric contact pressure gauge to solve the problem that above-mentioned prior art exists, make the manometer capacious, signal sensitive, the precision is high, set up convenient directly perceived, long service life, thereby make the equipment operation can obtain more accurate reliable control.

In order to achieve the above object, the utility model provides a following scheme:

the utility model provides a micro-gap switch type electric contact pressure gauge, which comprises a meter shell with a circular section, wherein a triangular base is fixedly arranged in the meter shell, an indicating part is arranged on the triangular base, the indicating part is positioned at the central position of the meter shell, and two adjusting parts are symmetrically arranged on the triangular base positioned at one end of the indicating part; the watch comprises a watch shell, a circular label part, a pointer part and a scale, wherein the watch shell is fixedly provided with the circular label part, the center of the label part is provided with the pointer part in a penetrating way, one end of the pointer part is connected with the indication part, the other end of the pointer part is connected with the pointer, the pointer is positioned on the upper surface of the label part, and the edge of the upper surface of the label part is provided with the scale; the adjusting part is connected with an adjusting rod, the adjusting rod penetrates through the label part and then is connected with a knob, and adjusting scales are arranged on the label part at the knob; the upper surface of the watch shell is hermetically connected with a transparent watch cover; a connector is mounted on the side wall of the watchcase, a shunt tube is arranged in the connector, and the shunt tube is respectively communicated with the indicating part and the adjusting part; and a junction box is arranged on the watch case on one side of the joint, and a lead is arranged in the junction box.

Optionally, the indication portion includes a first mounting seat fixedly disposed on the triangular base, a core portion is disposed on the first mounting seat, one end of the core portion is movably connected with an arc-shaped connecting rod, a first spring tube of a three-quarter circular structure is surrounded on the outer side of the first mounting seat, one end of the first spring tube is fixedly connected with the first mounting seat, and the other end of the first spring tube is fixedly connected with one end of the arc-shaped connecting rod away from the core portion; the machine core part is connected with the pointer part.

Optionally, the core part comprises an L-shaped connecting rod and an 8-shaped plate, the end part of the short side of the L-shaped connecting rod is in contact connection with one end of the arc-shaped connecting rod through a connecting piece, an adjusting groove is formed in the connecting piece, an adjusting screw penetrates through the adjusting groove, and the adjusting screw is connected with the end part of the arc-shaped connecting rod; a connecting rod penetrates through the middle of the long edge of the L-shaped connecting rod, one end of the connecting rod is connected with the pointer component, the other end of the connecting rod penetrates through the middle of the 8-shaped plate, a gear is fixedly sleeved on the connecting rod and positioned between the L-shaped connecting rod and the 8-shaped plate, the gear is meshed with a rack, the rack is fixedly arranged on the 8-shaped plate, two ends of the 8-shaped plate are provided with symmetrical arc-shaped grooves, and screws connected with the first mounting seat penetrate through the arc-shaped grooves; the end part of the long edge of the L-shaped connecting rod is connected with the side wall of one end of the 8-shaped plate through a screw.

Optionally, a plastic cushion block is fixedly arranged between the triangular base and the first mounting seat.

Optionally, the adjusting portion includes a second mounting seat fixedly arranged on the triangular base, an adjusting sheet is connected to the center of the second mounting seat through a rotating shaft screw, one end of the adjusting sheet is connected with a microswitch shifting sheet, the other end of the adjusting sheet is provided with a transverse sharp mouth, the transverse sharp mouth is in contact connection with a cam, the cam is movably arranged on the second mounting seat, and the upper end of the cam is fixedly connected with the adjusting rod; one side of the microswitch shifting piece is connected with an adjusting screw rod, an adjusting screw rod piece is sleeved on the adjusting screw rod, a microswitch is arranged on the other side of the microswitch shifting piece, the microswitch is connected with a spring through a screw, and the tail end of the spring is arranged at the edge position of the second mounting seat; a second spring tube with a quarter of a third circle is wound on the outer ring of the second mounting seat, one end of the second spring tube is fixedly connected with the second mounting seat through a sliding mounting seat, a strip-shaped groove is formed in the sliding mounting seat, a fastener is arranged in the strip-shaped groove, one end of the fastener is fixedly connected with a mounting cushion block, and the mounting cushion block is fixedly arranged on the second mounting seat; the other end is connected with the adjusting screw piece; the tail end of the spring is positioned at the connecting end of the second spring pipe and the adjusting screw rod sheet and is fixedly connected with the inner side of the second spring pipe; the spring is an extension spring, so that the second spring tube and the microswitch shifting piece can be driven to reset.

Optionally, the triangular base is fixedly mounted in the watch case through a fastener, a connection mounting bracket is arranged on the inner wall of the watch case, and the label part is fixedly connected with the connection mounting bracket through a fastener; and a sealing rubber ring is arranged at the joint of the watch cover and the watch case.

Optionally, one end of the joint penetrates through the side wall of the watch case and is fixedly connected with the watch case through a matching fastener, and a joint gasket is arranged at the connecting position of the joint and the watch case.

Optionally, a memory pointer part penetrates through the center of the watch cover, one end of the memory pointer part is fixedly arranged on the watch cover, the other end of the memory pointer part penetrates through the watch cover and then is movably provided with a memory pointer, and the memory pointer is in contact connection with the pointer through a hanging part.

The utility model discloses for prior art gain following technological effect:

the utility model discloses utilize the elastic displacement of pressure sensing element (bourdon tube) characteristic, by the opening and shutting of three pressure sensing element of group drive gear mechanism of amplification and micro-gap switch respectively, realize that instrument pressure indicating value indicates and break-make signal control to reach automatic control and the mesh that signals were reported to the police. The pressure of various fluid media without explosion danger in various electromechanical devices is controlled, the capacity is large, signals are sensitive, the precision is high, the setting is convenient and visual, and the service life is long, so that the operation of the device can be controlled more accurately and reliably.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a side sectional view of the present invention;

FIG. 3 is a schematic view of the structure of the adjusting part of the present invention;

description of reference numerals: 1. the device comprises a cam, 2, an adjusting part, 2-1, a sliding mounting seat, 2-2, a second spring tube, 2-3, an adjusting screw sheet, 3, a mounting cushion block, 4, a rotating shaft screw, 5, an adjusting sheet, 6, a spring, 7, a microswitch, 8, an adjusting screw, 9, a plastic cushion block, 10, a junction box, 11, an indicating part, 12, an arc connecting rod, 13, a machine core part, 14, a triangular base, 15, a mounting bracket, 16, a watchcase, 17, a shunt pipe, 18, a watch cover, 19, a sealing rubber ring, 20, glass, 21, a label part, 22, a pointer part, 23, a memory pointer, 24, an adjusting rod, 25, a knob, 26, a joint gasket, 27, a joint, 28, a first spring tube, 29 and a microswitch shifting sheet.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.

The utility model provides a micro-gap switch type electric contact pressure gauge, as shown in figure 1-figure 3, comprising a watchcase 16 with a circular section, a triangular base 14 is fixedly arranged in the watchcase 16, an indicating part 11 is arranged on the triangular base 14, the indicating part 11 is positioned at the center of the watchcase 16, and two adjusting parts 2 are symmetrically arranged on the triangular base 14 positioned at one end of the indicating part 11; a circular label part 21 is fixedly arranged on the watch case 16, a pointer component 22 penetrates through the center of the label part 21, one end of the pointer component 22 is connected with the indication part 11, the other end of the pointer component is connected with a pointer, the pointer is positioned on the upper surface of the label part 21, and the edge of the upper surface of the label part 21 is provided with scales; the adjusting part 2 is connected with an adjusting rod 24, the adjusting rod 24 is connected with a knob 25 after penetrating through the label part 21, and the label part 21 at the knob 25 is provided with adjusting scales; a transparent cover 18 is hermetically connected to the upper surface of the watch shell 16; a connector 27 is arranged on the side wall of the watchcase 16, a shunt pipe 17 is arranged in the connector 27, and the shunt pipe 17 is respectively communicated with the indicating part 11 and the adjusting part 2; the junction box 10 is provided on the case 16 on the side of the junction 27, and wires are mounted in the junction box 10.

Preferably, the indicating part 11 includes a first mounting seat fixedly arranged on the triangular base 14, the first mounting seat is provided with a machine core part 13, one end of the machine core part 13 is movably connected with the arc-shaped connecting rod 12, a first spring tube 28 with a three-quarter circular structure surrounds the outer side of the first mounting seat, one end of the first spring tube 28 is fixedly connected with the first mounting seat, and the other end is fixedly connected with one end of the arc-shaped connecting rod 12 away from the machine core part 13; the movement portion 13 is connected to the pointer member 22. The machine core part 13 comprises an L-shaped connecting rod and an 8-shaped plate, the end part of the short side of the L-shaped connecting rod is in contact connection with one end of the arc-shaped connecting rod 12 through a connecting piece, an adjusting groove is formed in the connecting piece, an adjusting screw penetrates through the adjusting groove, and the adjusting screw is connected with the end part of the arc-shaped connecting rod 12; a connecting rod penetrates through the middle of the long edge of the L-shaped connecting rod, one end of the connecting rod is connected with the pointer part 22, the other end of the connecting rod penetrates through the middle of the 8-shaped plate, a gear is fixedly sleeved on the connecting rod and positioned between the L-shaped connecting rod and the 8-shaped plate, the gear is meshed with a rack which is fixedly arranged on the 8-shaped plate, symmetrical arc-shaped grooves are formed in two ends of the 8-shaped plate, and screws connected with the first mounting seat penetrate through the arc-shaped grooves; the end part of the long edge of the L-shaped connecting rod is connected with the side wall of one end of the 8-shaped plate through a screw. A plastic cushion block 9 is fixedly arranged between the triangular base 14 and the first mounting seat.

The adjusting part 2 comprises a second mounting seat fixedly arranged on the triangular base 14, the central position of the second mounting seat is connected with an adjusting sheet 5 through a rotating shaft screw 4, one end of the adjusting sheet 5 is connected with a microswitch shifting sheet 29, the other end of the adjusting sheet is provided with a transverse sharp mouth, the transverse sharp mouth is in contact connection with a cam 1, the cam 1 is movably arranged on the second mounting seat, and the upper end part of the cam 1 is fixedly connected with an adjusting rod 24; one side of the microswitch shifting sheet 29 is connected with an adjusting screw 8, the adjusting screw 8 is sleeved with adjusting screw sheets 2-3, the other side of the microswitch shifting sheet 29 is provided with a microswitch 7, the microswitch 7 is connected with a spring 6 through a screw, and the tail end of the spring 6 is arranged at the edge position of the second mounting seat; a second spring tube 2-2 with a quarter of a circle is wound on the outer ring of the second mounting seat, one end of the second spring tube 2-2 is fixedly connected with the second mounting seat through a sliding mounting seat 2-1, a strip-shaped groove is formed in the sliding mounting seat 2-1, a fastener is arranged in the strip-shaped groove, one end of the fastener is fixedly connected with a mounting cushion block 3, and the mounting cushion block 3 is fixedly arranged on the second mounting seat; the other end of the second spring tube 2-2 is fixedly connected with the adjusting screw piece 2-3 and can drive the adjusting screw piece 2-2 to move; the tail end of the spring 6 is positioned at the connecting end of the second spring pipe 2-2 and the adjusting screw piece 2-3 and is fixedly connected with the inner side of the second spring pipe 2-2, so that the spring 6 can move along with the inward compression of the second spring pipe 2-2, the spring 6 is an extension spring and always has outward tension, under the action of the spring 6, when no signal exists, the tip of the adjusting piece 5 always abuts against a cam by taking the rotating shaft screw 4 as a movable rotating shaft, when a signal exists, the micro switch shifting piece 29 of the adjusting piece is driven by the stress of the second spring pipe 2-2 to move inwards around the rotating shaft screw 4, the spring 6 is driven to compress and bear force, and when the signal is disconnected, the compressed spring 6 drives the second spring pipe 2-2 to drive the micro switch shifting piece 29 to rotate around the rotating shaft screw 4 to reset.

The triangular base 14 is fixedly arranged in the watchcase 16 through a fastener, the inner wall of the watchcase 16 is provided with a connecting and mounting bracket 15, and the label part 21 is fixedly connected with the connecting and mounting bracket 15 through the fastener; a sealing rubber ring 19 is arranged at the joint of the watch cover 18 and the watch case 16. One end of joint 27 passes through the side wall of watch case 16 and is fixedly connected with watch case 16 through a matching fastener, and joint gasket 26 is arranged at the connecting position of joint 27 and watch case 16. A memory pointer 23 part is arranged at the center of the watch cover 18 in a penetrating way, one end of the memory pointer 23 part is fixedly arranged on the watch cover 18, the other end of the memory pointer 23 part penetrates through the watch cover 18 and is movably provided with the memory pointer 23, and the memory pointer 23 is in contact connection with the pointer through a hanging part.

The utility model discloses during operation, first spring tube 28 produces elastic deformation and arouses pipe end (free end) displacement under the effect of pressure, and its displacement passes through mechanical transmission mechanism, and L shape connecting rod and core portion 13 in arc connecting rod 12 and the core portion 13 part enlarge promptly, transmit for pointer part 22, deflect on the scale of sign portion 21 by the pointer of pointer part 22 again and indicate the pressure value.

Specifically, the first spring tube 28 is divided into two ends, one end is welded and fixed, and the other end is a free end; when pressure acts on the first spring tube 28, the free end of the first spring tube is elastically deformed, and the position of the tube end is changed, namely displacement; the linear displacement is transmitted to the core part 13 through the connecting rod and converted into the angular displacement (gear transmission) of the core part 13, and the displacement is very small, for example, the displacement of the free end of the first spring tube 28 is only a few millimeters, if the linear displacement of the tube end is converted into the angular displacement of the pointer, the indication of the scale value can be completed only through the core part 13, so the core part 13 plays a role of transmission and amplification in the pressure gauge.

The two adjusting parts 2 are respectively used as an upper limit setting device and a lower limit setting device, the micro switch 7 is installed at the tail part of the adjusting sheet 5, a pressure sensitive element in the adjusting parts 2 is one end of the free end of the second spring tube 2-2, the second spring tube 2-2 can adopt a Bourdon tube, the adjusting screw rod piece 2-3 at the free end of the second spring tube is connected with an adjusting screw rod 8 which can be finely adjusted, and the adjusting screw rod 8 acts on the switch plectrum to the full stroke position under the non-working state; the sharp mouth at the other end of the adjusting sheet 5 props against the side arc of the cam 1, one end of the microswitch 7 is provided with a spring 6, the spring 6 is an extension spring, and the sharp mouth of the adjusting sheet 5 always abuts against the cam 1 by taking a rotating shaft screw 4 as a movable rotating shaft and helps to reset; the adjusting cam 1 is rotated clockwise or anticlockwise to change the tail position of the adjusting sheet 5 provided with the microswitch 7, so that the stroke position of the microswitch shifting sheet 29 is adjusted to achieve the set purpose; during instrument adjustment, the stroke distance of the microswitch shifting sheet 29 is finely adjusted by changing the position of the adjusting screw 8, so that the precision is more accurate when the on-off of signals is switched.

The lower limit setting device is arranged at the left lower part of the instrument panel, the upper limit setting device is arranged at the right lower part of the instrument panel, the switch control type is that the left is normally closed and the right is normally opened, the internal structures of the two are the same, the assembly mode is that the two are arranged symmetrically,

when pressure is introduced through the joint 27, the pressure is simultaneously introduced into the three groups of pressure sensitive element spring tubes through the shunt tubes 17, the first spring tube 28 and the second spring tube 2-2 have the same structure, the shunt tubes 17 are equivalent to the function of a tee joint, and the welding tightness of each shunt part must be performed; the free end of the spring tube simultaneously generates displacement under the action of pressure, all the sensitive elements are communicated with each other, the position of the indicating part 11 and the set position are always kept synchronous, and the indicating part 11 is connected with an amplifying mechanism of the machine core part 13 to display a pressure indicating value through an indicating device; the other two adjusting parts 2 respectively drive a microswitch shifting sheet 29, the setting of a set value is realized by utilizing the fine adjustment of the cam 1 device, and scales are marked at the knob 25 to display the set indication value; the knob 25 is arranged on the adjusting rod 24, when the upper limit is set, the knob 25 is rotated to drive the cam 1, so that the position of the microswitch 7 is changed, and one indication value detecting point which is required to be set and is between 50% and 75% of the upper limit is selected; when the pressure rises to the set point of the upper limit of the measuring range, the second spring tube drives the adjusting screw rod piece to move inwards, the microswitch shifting piece is connected with the microswitch, the spring synchronously moves and compresses along with the second spring tube, and the signal is switched on; when the pressure is lower than the set point, the spring resets to drive the second spring tube to move reversely, the adjusting screw rod piece moves reversely, the microswitch shifting piece is disconnected with the microswitch, and therefore the signal is disconnected. The difference between the reading of the scale set point at the knob 25 and the reading indicated by the gauge indicating device is the set point deviation; the difference between the reading of the indication when the signal is on and the reading of the indication when the signal is off is the switching difference. The setting and debugging of the lower limit range of 25 percent to 50 percent is the same as the upper limit debugging method.

When the instrument leaves a factory, a set point between 50% and 75% of the upper limit and a set point between 25% and 50% of the lower limit are set as rated points to be used as factory settings, and if different requirements exist in customers, the set points can be set according to the requirements of the customers.

When the instrument is used, the joint 27 is hermetically connected with the used equipment, and the joint 27 is fixedly arranged with the meter shell 16 in the instrument protection device and has the function of connecting the equipment and transmitting pressure; the triangular base 14 is arranged at the bottom of an inner barrel of the watch shell 16 and is used for positioning and fixing an internal structure; the plastic cushion block 9 is fixed at the central position of the triangular base 14, and is used for installing the indicating part 11 with the indicating function, the function of the plastic cushion block is used for increasing the height of the indicating part 11, and the final purpose is to enable the central shaft of the machine core part 13 of the amplifying device to reach a proper height size; the indicating device comprises a sign part 21, a pointer part 22 and a watch cover 18, wherein glass 20 is arranged on the inner side of the watch cover 18, the sign part 21 is arranged on 3 equally-divided mounting supports 15 of the watch case 16, the pointer part 22 is riveted on a central shaft of a machine core part 13 after the instrument is calibrated and is positioned above the sign part 21 by a drop distance of 1-3 mm, the glass 20 is arranged on the inner side of the watch cover 18, a rubber ring is arranged between the glass 20 and the mouth part of the watch case 16 part, when the watch cover 18 is screwed with the watch case 16, the indicating device can play a role of dust prevention and moisture prevention, and has the function of displaying a pressure indication value; the center of the glass 20 is also provided with a memory pointer 23, when the indicating end of the memory pointer is overlapped with the pointer part 22, the memory pointer 23 is naturally hung at one side of the boosting track direction of the pointer, when the pressure is increased to the peak value or the preset pressure value, the equipment is depressurized, and the memory pointer 23 stays at the peak value or the preset pressure value, so that the working running state of the equipment can be recorded, and the better control can be carried out; the junction box 10 is mounted on the right front side of the case 16 and connects the wires to the electromechanical control and alarm system of the instrument when the instrument is installed for use.

The utility model discloses a through combination pressure sensing element (bourdon tube) promptly spring pipe, cam micromatic setting, micro-gap type switch combine the electric contact manometer who realizes the equipment break-make. The product adopts a plurality of pressure sensing element combinations in structure, when medium pressure is introduced, the free end simultaneously generates displacement, one direct drive gear amplification mechanism displays a pressure indicating value, and the other two direct drive gears respectively drive the opening and closing of a micro switch 7 to realize the on-off signal control of the instrument so as to achieve the purposes of automatic control and signal sending alarm. All the sensitive elements are communicated with each other, so that the indication and the set pressure are always kept synchronous. Microswitch 7 opens and shuts and realizes the settlement of setting value through cam micromatic setting, and set knob 25 department marks specific scale indicating value, and the setting value is read more directly perceived and the switching value, has large capacity, signal sensitivity, precision height, sets up convenient directly perceived, long service life based on this novel product to make equipment operation can obtain more accurate reliable control.

The utility model discloses a concrete example is applied to explain the principle and the implementation mode of the utility model, and the explanation of the above example is only used to help understand the method and the core idea of the utility model; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.

Claims

1. A micro-switch type electric contact pressure gauge is characterized in that: the watch comprises a watch case with a circular section, wherein a triangular base is fixedly arranged in the watch case, an indicating part is arranged on the triangular base, the indicating part is positioned at the center of the watch case, and two adjusting parts are symmetrically arranged on the triangular base positioned at one end of the indicating part; the watch comprises a watch shell, a circular label part, a pointer part and a scale, wherein the watch shell is fixedly provided with the circular label part, the center of the label part is provided with the pointer part in a penetrating way, one end of the pointer part is connected with the indication part, the other end of the pointer part is connected with the pointer, the pointer is positioned on the upper surface of the label part, and the edge of the upper surface of the label part is provided with the scale; the adjusting part is connected with an adjusting rod, the adjusting rod penetrates through the label part and then is connected with a knob, and adjusting scales are arranged on the label part at the knob; the upper surface of the watch shell is hermetically connected with a transparent watch cover; a connector is mounted on the side wall of the watchcase, a shunt tube is arranged in the connector, and the shunt tube is respectively communicated with the indicating part and the adjusting part; and a junction box is arranged on the watch case on one side of the joint, and a lead is arranged in the junction box.

2. A micro-switch electro-contact pressure gauge as set forth in claim 1, wherein: the indicating part comprises a first mounting seat fixedly arranged on the triangular base, a core part is arranged on the first mounting seat, one end of the core part is movably connected with an arc-shaped connecting rod, a first spring tube with a three-quarter circular structure is encircled outside the first mounting seat, one end of the first spring tube is fixedly connected with the first mounting seat, and the other end of the first spring tube is fixedly connected with one end, far away from the core part, of the arc-shaped connecting rod; the machine core part is connected with the pointer part.

3. A micro-switch electro-contact pressure gauge as claimed in claim 2, wherein: the machine core part comprises an L-shaped connecting rod and an 8-shaped plate, the end part of the short side of the L-shaped connecting rod is in contact connection with one end of the arc-shaped connecting rod through a connecting piece, an adjusting groove is formed in the connecting piece, an adjusting screw penetrates through the adjusting groove, and the adjusting screw is connected with the end part of the arc-shaped connecting rod; a connecting rod penetrates through the middle of the long edge of the L-shaped connecting rod, one end of the connecting rod is connected with the pointer component, the other end of the connecting rod penetrates through the middle of the 8-shaped plate, a gear is fixedly sleeved on the connecting rod and positioned between the L-shaped connecting rod and the 8-shaped plate, the gear is meshed with a rack, the rack is fixedly arranged on the 8-shaped plate, two ends of the 8-shaped plate are provided with symmetrical arc-shaped grooves, and screws connected with the first mounting seat penetrate through the arc-shaped grooves; the end part of the long edge of the L-shaped connecting rod is connected with the side wall of one end of the 8-shaped plate through a screw.

4. A micro-switch electro-contact pressure gauge as set forth in claim 3, wherein: and a plastic cushion block is fixedly arranged between the triangular base and the first mounting seat.

5. A micro-switch electro-contact pressure gauge as set forth in claim 1, wherein: the adjusting part comprises a second mounting seat fixedly arranged on the triangular base, an adjusting sheet is connected to the center of the second mounting seat through a rotating shaft screw, one end of the adjusting sheet is connected with a microswitch shifting sheet, the other end of the adjusting sheet is provided with a transverse sharp mouth, the transverse sharp mouth is in contact connection with a cam, the cam is movably arranged on the second mounting seat, and the upper end part of the cam is fixedly connected with the adjusting rod; one side of the microswitch shifting piece is connected with an adjusting screw rod, an adjusting screw rod piece is sleeved on the adjusting screw rod, a microswitch is arranged on the other side of the microswitch shifting piece, the microswitch is connected with a spring through a screw, and the tail end of the spring is arranged at the edge position of the second mounting seat; a second spring tube with a quarter of a third circle is wound on the outer ring of the second mounting seat, one end of the second spring tube is fixedly connected with the second mounting seat through a sliding mounting seat, a strip-shaped groove is formed in the sliding mounting seat, a fastener is arranged in the strip-shaped groove, one end of the fastener is fixedly connected with a mounting cushion block, and the mounting cushion block is fixedly arranged on the second mounting seat; the other end is connected with the adjusting screw piece; the tail end of the spring is positioned at the connecting end of the second spring pipe and the adjusting screw rod sheet and is fixedly connected with the inner side of the second spring pipe; the spring can drive the second spring tube and the microswitch shifting sheet to reset.

6. A micro-switch electro-contact pressure gauge as set forth in claim 1, wherein: the triangular base is fixedly arranged in the watchcase through a fastener, a connecting and mounting bracket is arranged on the inner wall of the watchcase, and the label part is fixedly connected with the connecting and mounting bracket through the fastener; and a sealing rubber ring is arranged at the joint of the watch cover and the watch case.

7. A micro-switch electro-contact pressure gauge as set forth in claim 1, wherein: one end of the joint penetrates through the side wall of the watchcase and then is fixedly connected with the watchcase through a matched fastener, and a joint gasket is arranged at the connecting position of the joint and the watchcase.

8. A micro-switch electro-contact pressure gauge as set forth in claim 1, wherein: the watch comprises a watch cover and is characterized in that a memory pointer part penetrates through the center of the watch cover, one end of the memory pointer part is fixedly arranged on the watch cover, the other end of the memory pointer part penetrates through the watch cover and is movably provided with a memory pointer, and the memory pointer is in contact connection with the pointer through a hanging part.