Flat plate type miniature force transducer

Abstract

The utility model discloses a flat plate type miniature force transducer, which belongs to the technical field of force transducers and comprises a shell, a mounting component is arranged in the side wall of the shell, a cover plate is arranged in the shell, and a connecting component is arranged in the cover plate. Under the elastic acting force of the first spring in the through groove, the clamping block and the clamping groove are tightly inserted so that the cover plate can be installed and positioned, the cover plate can be taken down after the control block is moved to drive the clamping block to be separated from the clamping groove, and the cover plate is easy and convenient to disassemble and maintain; according to the utility model, the installation assembly is arranged, the ejector block is moved to drive the limiting block to move into the sliding groove, then the signal transmission line is pressed into the wiring hole in the shell through the U-shaped opening of the sliding groove, and the limiting block is inserted into the butt joint groove under the elastic acting force of the second spring when the ejector block is loosened; and the limiting block seals the opening of the sliding groove to limit the signal transmission line, so that the device is more convenient to assemble.

Description

Technical Field

[0001] The utility model belongs to the technical field of force sensors, and in particular relates to a flat-plate micro force sensor. Background Art

[0002] A force sensor consists of three main parts: one or more elastic bodies that can deform when subjected to force, a bridge circuit (such as a Wheatstone bridge) consisting of a resistance strain gauge that can sense the deformation, an adhesive that can fix the resistance strain gauge on the elastic body and can conduct the strain, and a sealant that protects the electronic circuit.

[0003] Chinese patent application number 201721464776.4 discloses a flat-plate micro-force sensor, comprising a main body, a cavity extending only through the bottom of the main body, a flat-plate elastic body for detecting strain at the top of the cavity, a cover for sealing the cavity at the bottom of the main body, and a pressure-bearing column for bearing force at the center of the main body's upper surface. The flat-plate elastic body is easy to process, effectively reducing processing and manufacturing costs. This solves the problem of this product, which has been stagnant for many years in China and has addressed the shortage and instability of the domestic market. It effectively replaces similar products imported from Honeywell in the United States and Japan, and has achieved very good results.

[0004] In the above-mentioned patent, the cover and the main body are connected, assembled and fixed by gluing, which makes it inconvenient to carry out maintenance of the force sensor device. After the elastomer is installed in the cavity of the main body, the signal transmission line is not convenient to pass through the wiring hole on the side wall of the main body, making the installation operation inconvenient. Utility Model Content

[0005] In order to solve the problems raised in the above background technology, the utility model provides a flat-plate micro force sensor, which has the characteristics of being easy to repair and install.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a flat-plate micro force sensor, comprising a shell, a cavity is provided inside the shell, an elastomer is embedded inside the cavity, a signal transmission line is connected to the side of the elastomer, a pressure column is installed on the surface of the shell, an installation component is provided inside the side wall of the shell, a cover plate is provided inside the shell, and a connecting component is provided inside the cover plate.

[0007] Preferably, the connecting component includes a card slot, an auxiliary component, a control block, a card block, a spring 1 and a through slot, wherein two through slots are opened inside the cover plate, a spring 1 is embedded inside the through slot, the side of the spring 1 is connected to the control block, the side of the control block is connected to the card block, the top of the control block is provided with an auxiliary component, two card slots are opened inside the shell, and a plug-in structure is formed between the card block and the card slot.

[0008] Preferably, the through groove is L-shaped, the surface of the control block is tightly fitted with the inner wall of the through groove, and the top of the control block is flush with the surface of the cover plate.

[0009] Preferably, the auxiliary component includes a receiving groove, a sealing plate and a control groove, wherein the control groove is opened on the top of the control block, the side of the control block is connected to the sealing plate, and the side of the through groove is connected to the receiving groove.

[0010] Preferably, the installation assembly includes a top block, a limit block, a second spring and a slide groove, wherein a slide groove is opened inside the side wall of the shell, a second spring is installed inside the slide groove, the side of the second spring is connected to the limit block, and the top of the limit block is connected to the top block.

[0011] Preferably, a docking groove is provided on the side of the slide groove, and a notch is provided on the top side of the top block.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. The utility model sets a connecting component, and the cover plate is closed and limited at the port of the shell. Under the elastic force of the spring inside the through slot, the card block and the card slot are tightly plugged to install and position the cover plate. After the moving control block drives the card block to separate from the card slot, the cover plate can be removed. The cover plate is easy to disassemble and assemble, and the flat-plate micro force sensor can be disassembled and repaired.

[0014] 2. The utility model sets an installation component, moves the top block to drive the limit block to move into the slide groove, and then presses the signal transmission line into the wiring hole in the shell through the U-shaped opening of the slide groove. The top block is loosened and the limit block is plugged into the docking groove under the elastic force of the spring 2. The limit block closes the slide groove opening and limits the signal transmission line, which is convenient for the installation and positioning of the elastomer and the signal transmission line, making the device more convenient to assemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is the main view of the utility model;

[0016] Figure 2 This is the front view of the cavity of the utility model;

[0017] Figure 3 This is the front view of the connection assembly of the present utility model;

[0018] Figure 4 This is the front view of the installation component of the utility model.

[0019] In the figure: 1. Cover plate; 2. Connecting assembly; 21. Card slot; 22. Auxiliary assembly; 221. Storage slot; 222. Closing plate; 223. Control slot; 23. Control block; 24. Card block; 25. Spring 1; 26. Through slot; 3. Pressure column; 4. Installation assembly; 41. Top block; 42. Docking slot; 43. Limit block; 44. Spring 2; 45. Slide slot; 5. Signal transmission line; 6. Shell; 7. Cavity; 8. Elastomer. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. Example 1

[0021] See also Figure 1-4 The utility model provides the following technical solutions: a flat-plate micro force sensor, comprising a shell 6, a cavity 7 is provided inside the shell 6, an elastomer 8 is embedded inside the cavity 7, a signal transmission line 5 is connected to the side of the elastomer 8, a pressure column 3 is installed on the surface of the shell 6, a mounting component 4 is provided inside the side wall of the shell 6, a cover plate 1 is provided inside the shell 6, and a connecting component 2 is provided inside the cover plate 1.

[0022] Specifically, the connecting component 2 includes a card slot 21, an auxiliary component 22, a control block 23, a card block 24, a spring 25 and a through slot 26. Two through slots 26 are provided inside the cover 1, and a spring 25 is embedded inside the through slot 26. The side of the spring 25 is connected to the control block 23, and the side of the control block 23 is connected to the card block 24. The top of the control block 23 is provided with an auxiliary component 22. Two card slots 21 are provided inside the shell 6, and a plug-in structure is provided between the card block 24 and the card slot 21.

[0023] By adopting the above technical solution, the cover plate 1 is closed and limited at the port of the shell 6. Under the elastic force of the spring 25 inside the through groove 26, the block 24 and the slot 21 are tightly plugged together to enable the cover plate 1 to be installed and positioned. After the moving control block 23 drives the block 24 to separate from the slot 21, the cover plate 1 can be removed. The cover plate 1 is easy to disassemble and assemble, and the flat-plate micro force sensor can be disassembled and repaired.

[0024] Specifically, the through groove 26 has an L-shaped structure, the surface of the control block 23 is tightly fitted with the inner wall of the through groove 26 , and the top of the control block 23 is flush with the surface of the cover plate 1 .

[0025] By adopting the above technical solution, the surface of the control block 23 is tightly fitted with the inner wall of the through slot 26 , which can make the insertion between the clamping block 24 and the clamping slot 21 more secure.

[0026] Specifically, the auxiliary component 22 includes a receiving groove 221, a sealing plate 222 and a control groove 223. The control groove 223 is opened on the top of the control block 23, the side of the control block 23 is connected to the sealing plate 222, and the side of the through groove 26 is connected to the receiving groove 221.

[0027] By adopting the above technical solution, the control groove 223 facilitates the control block 23 to drive the card block 24 to move, and the storage groove 221 is used to accommodate the movement of the sealing plate 222. The sealing plate 222 can block the top of the through groove 26 to prevent debris from entering and affecting the movement of the control block 23, thereby making the device more effective.

[0028] When this embodiment is in use, the elastomer 8 is installed inside the cavity 7 of the shell 6, and the cover plate 1 is closed and limited at the port of the shell 6. Under the elastic force of the spring 25 inside the through groove 26, the block 24 and the slot 21 are tightly plugged together to allow the cover plate 1 to be installed and positioned. After the moving control block 23 drives the block 24 to separate from the slot 21, the cover plate 1 can be removed. The cover plate 1 is easy to assemble and disassemble, and it is convenient to disassemble and repair the flat-plate micro force sensor. The control groove 223 facilitates the control block 23 to drive the block 24 to move. The storage groove 221 is used to accommodate the movement of the sealing plate 222. The sealing plate 222 can block the top of the through groove 26 to prevent debris from entering and affecting the movement of the control block 23, which can make the device more effective. The pressure-bearing column 3 is used to bear the pressure and then transmit it to the elastomer 8 for detection. Example 2

[0029] The difference between this embodiment and embodiment 1 is that the installation assembly 4 includes a top block 41, a limit block 43, a second spring 44 and a slide groove 45. The slide groove 45 is opened inside the side wall of the shell 6, and the second spring 44 is installed inside the slide groove 45. The side of the second spring 44 is connected to the limit block 43, and the top of the limit block 43 is connected to the top block 41.

[0030] Specifically, a docking groove 42 is provided on the side of the slide groove 45 , and a notch is provided on the top side of the top block 41 .

[0031] By adopting the above technical solution, the top block 41 is moved through the slot to drive the limit block 43 to move into the slide groove 45, and then the signal transmission line 5 is pressed into the wiring hole in the shell 6 through the U-shaped opening of the slide groove 45. The top block 41 is loosened and the limit block 43 is plugged into the docking groove 42 under the elastic force of the spring 2 44. The limit block 43 closes the opening of the slide groove 45 to limit the installation of the signal transmission line 5, which is convenient for the installation and positioning of the elastomer 8 and the signal transmission line 5, making the device more convenient to assemble.

[0032] When this embodiment is used, the movable top block 41 drives the limit block 43 to move into the slide groove 45, and then the signal transmission line 5 is pressed into the wiring hole in the shell 6 through the U-shaped opening of the slide groove 45. The top block 41 is released and the limit block 43 is plugged into the docking groove 42 under the elastic force of the spring 2 44. The limit block 43 closes the opening of the slide groove 45 to limit the signal transmission line 5, which is convenient for the installation and positioning of the elastomer 8 and the signal transmission line 5, making the device more convenient to assemble.

[0033] The structure and usage principle of the cover plate 1, pressure-bearing column 3, signal transmission line 5, shell 6, cavity 7 and elastomer 8 in the utility model have been disclosed in Chinese patent application No. 201721464776.4, which discloses a flat-plate micro force sensor. Its working principle is that the elastomer 8 is installed inside the cavity 7 of the shell 6, the signal transmission line 5 passes through the shell 6 and is connected to the elastomer 8, the cover plate 1 is closed and limited at the opening of the shell 6, and the pressure-bearing column 3 is used to bear the pressure and then transmit it to the elastomer 8 for detection.

[0034] The working principle and use process of the present invention are as follows: when the present invention is used, the elastic body 8 is installed inside the cavity 7 of the shell 6, the movable top block 41 drives the limit block 43 to move into the slide groove 45, and then the signal transmission line 5 is pressed into the wiring hole in the shell 6 through the U-shaped opening of the slide groove 45, and the top block 41 is released. Under the elastic force of the spring 2 44, the limit block 43 is plugged into the docking groove 42, and the limit block 43 closes the opening of the slide groove 45 to limit the signal transmission line 5, which is convenient for the installation and positioning of the elastic body 8 and the signal transmission line 5, making it more convenient to assemble the device, and the cover plate 1 is closed and limited at the port of the shell 6. Under the elastic force of the spring 25 inside the through groove 26, the block 24 and the slot 21 are tightly plugged together to allow the cover 1 to be installed and positioned. After the moving control block 23 drives the block 24 to separate from the slot 21, the cover 1 can be removed. The cover 1 is easy to assemble and disassemble, which is convenient for disassembling and repairing the flat-plate micro force sensor. The control groove 223 facilitates the control block 23 to drive the block 24 to move. The receiving groove 221 is used to accommodate the movement of the sealing plate 222. The sealing plate 222 can block the top of the through groove 26 to prevent debris from entering and affecting the movement of the control block 23, so that the device can be used more effectively. The pressure-bearing column 3 is used to bear the pressure and then transmit it to the elastic body 8 for detection.

[0035] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flat-plate micro force sensor, comprising a housing (6), characterized in that: A cavity (7) is provided inside the shell (6), an elastomer (8) is embedded inside the cavity (7), a signal transmission line (5) is connected to the side of the elastomer (8), a pressure-bearing column (3) is installed on the surface of the shell (6), a mounting assembly (4) is provided inside the side wall of the shell (6), a cover plate (1) is provided inside the shell (6), and a connecting assembly (2) is provided inside the cover plate (1).

2. A flat-plate micro force sensor according to claim 1, characterized in that: The connecting component (2) includes a card slot (21), an auxiliary component (22), a control block (23), a card block (24), a spring (25) and a through slot (26), wherein two through slots (26) are provided inside the cover plate (1), a spring (25) is embedded inside the through slot (26), a side of the spring (25) is connected to the control block (23), a side of the control block (23) is connected to the card block (24), an auxiliary component (22) is provided on the top of the control block (23), two card slots (21) are provided inside the housing (6), and a plug-in structure is formed between the card block (24) and the card slot (21).

3. The flat-plate micro force sensor according to claim 2, characterized in that: The through groove (26) is in an L-shaped structure, the surface of the control block (23) is tightly fitted to the inner wall of the through groove (26), and the top end of the control block (23) is flush with the surface of the cover plate (1).

4. The flat-plate micro force sensor according to claim 2, characterized in that: The auxiliary component (22) comprises a receiving groove (221), a sealing plate (222) and a control groove (223), wherein the control groove (223) is provided on the top of the control block (23), the side of the control block (23) is connected to the sealing plate (222), and the side of the through groove (26) is connected to the receiving groove (221).

5. The flat-plate micro force sensor according to claim 1, characterized in that: The mounting assembly (4) includes a top block (41), a limit block (43), a second spring (44) and a slide groove (45), wherein the slide groove (45) is provided inside the side wall of the housing (6), the second spring (44) is installed inside the slide groove (45), the side surface of the second spring (44) is connected to the limit block (43), and the top of the limit block (43) is connected to the top block (41).

6. The flat-plate micro force sensor according to claim 5, characterized in that: A docking groove (42) is provided on the side of the slide groove (45), and a notch is provided on the top side of the top block (41).

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