Capacitive sensor production tool

Abstract

The utility model relates to a capacitive sensor production tool, which belongs to the technical field of sensor processing, and comprises a base, a base plate, a support plate, a support plate and a support plate, the clamps are arranged at the edge of the base, are used for clamping the edge of the diaphragm and can move in the direction away from the center of the diaphragm; the driving part is matched with the clamp to drive the clamp to move in the direction away from the center of the diaphragm, so that the diaphragm is tightened and flattened; the edge of the diaphragm can be respectively clamped at different positions through the arrangement of the plurality of clamps, and then the plurality of clamps are driven to move in the direction far away from the center of the diaphragm through the cooperation of the driving piece and the plurality of clamps, so that the diaphragm can be tightened and flattened, and the problem that the part, located on the sensor base, of the diaphragm droops due to factors such as gravity is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of sensor processing, in particular to a production tool for a capacitance sensor. Background Art

[0002] The welding tooling of the capacitive core is mainly used to locate the relative position between the sensor base and the diaphragm, and then weld the diaphragm to the sensor base through a welding gun.

[0003] like Figure 1 As shown, existing fixtures generally employ the following structure: a fixing block 101, used to secure the sensor base 102; a pressing fixture 103, positioned opposite the fixing block 101, used to press the diaphragm against the sensor base 102. The diaphragm is then welded to the sensor base 102 using a welding torch. However, this method has a disadvantage: since metal diaphragms with a thickness of 0.01 mm are currently commonly used, and this structure only positions the diaphragm by pressing its periphery, the center portion sags under gravity and deforms. This deformation after welding can render the product scrapped.

[0004] Therefore, a new type of capacitive sensor production tooling is needed that can provide a pre-tightened tension to the diaphragm to tighten and flatten the diaphragm. Utility Model Content

[0005] The embodiment of the utility model provides a capacitive sensor production tool to solve the problems in the prior art.

[0006] The present invention adopts the following technical solutions:

[0007] A capacitive sensor production tool is used for relative positioning of a sensor base and a diaphragm so that the diaphragm is located above the end face of the sensor base. The production tool comprises: a base, the center of which is used to place the sensor base; a plurality of clamps, which are arranged at the edge of the base and are used to clamp the edge of the diaphragm and can be moved away from the center of the diaphragm; and a driving member, which cooperates with the clamp to drive the clamp to move away from the center of the diaphragm, so that the diaphragm is tightened and flattened.

[0008] Preferably, the plurality of clamps are evenly distributed in a circular shape, and each clamp can move radially along the circular shape, thereby moving away from the center of the diaphragm.

[0009] Preferably, the diaphragm is substantially circular, and a plurality of lugs are evenly arranged around its edge; the clamp corresponds to the lugs one by one to achieve clamping of the lugs.

[0010] Preferably, the clamp includes: a slider slidably disposed in a slide groove of the base; and a clamping assembly disposed on the slider and capable of moving relative to the slider to press the edge of the diaphragm against the slider.

[0011] Preferably, the slider includes: a slider seat, which is slidably fitted in the slide groove; a slider top, which is connected to the slider seat and arranged opposite to the slider seat; and a cavity, which is located between the slider seat and the slider top.

[0012] Preferably, the clamping assembly includes: a clamping bolt, threadedly connected to the top of the slider, with its end facing the slider seat; a clamping block, located at the end of the clamping bolt, to follow the clamping bolt to move toward the slider seat to press the edge of the diaphragm onto the slider seat.

[0013] Preferably, a first guide surface is formed on the inner side of the top of the clamp; the driving member is configured as a pressure ring, the lower end of the pressure ring has an annular side wall, and the outer side of the bottom of the annular side wall is formed with a second guide surface that is adapted to the first guide surface so that the clamps are forced to move simultaneously away from the center of the diaphragm during the downward movement of the pressure ring.

[0014] Preferably, when the diaphragm is in a taut and flattened state, there is a gap between the diaphragm and the base, and the diaphragm is attached to the upper end surface of the sensor base.

[0015] Preferably, the production tooling further comprises: a pressure ring, which is installed on the inner side of the driving member and is movable relative to the driving member to force the portion of the diaphragm corresponding to the pressure ring to contact the base.

[0016] Preferably, at least two guide pillars are installed on the base, and positioning holes corresponding to the guide pillars are provided on the pressure ring; when the pressure ring moves downward, each guide pillar is inserted into the corresponding positioning hole and slidably cooperates with it.

[0017] At least one of the above technical solutions adopted in the embodiment of the present utility model can achieve the following

[0018] Beneficial effects:

[0019] By setting up a number of clamps, the edges of the diaphragm can be clamped at different positions respectively, and then the driving member cooperates with the several clamps to drive the several clamps to move in the direction away from the center of the diaphragm, so that the diaphragm can be tightened and flattened. Therefore, when the sensor base is fixedly set under the diaphragm, the diaphragm can be laid on the sensor base in a flattened state, thereby avoiding the problem of the part of the diaphragm located on the sensor base sagging due to factors such as gravity. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0021] Figure 1It is a structural diagram of the background technology of this utility model.

[0022] Figure 2 It is a schematic diagram of the three-dimensional structure of the utility model.

[0023] Figure 3 It is a three-dimensional structural sectional view of the utility model.

[0024] Figure 4 for Figure 3 A partial enlarged view of point A in the figure.

[0025] Figure 5 This is a schematic diagram of the first guide surface and the second guide surface of the present invention when they are fitted together.

[0026] Figure 6 This is an exploded view of the local structure of the utility model.

[0027] Figure 7 This is an exploded view of the base and driving component of the utility model.

[0028] Figure 8 This is an exploded view of the fixture of the present invention.

[0029] Figure 9 This is an exploded view of the fixture and diaphragm of the utility model.

[0030] Reference numerals

[0031] 101-fixed block; 102-sensor base; 103-clamping fixture; 1-sensor base; 2-diaphragm; 21-lug; 3-base; 31-slide groove; 32-guide column; 33-positioning groove; 34-support block; 4-clamp; 41-slider; 411-slider seat; 412-slider top; 413-cavity; 414-first guide surface; 42-clamping assembly; 421-clamping bolt; 422-clamping block; 5-driving member; 51-second guide surface; 52-positioning hole; 6-gap; 7-pressure ring; 8-pad. DETAILED DESCRIPTION

[0032] To make the purpose, technical solutions, and advantages of the present invention more clear, the following will provide a clear and complete description of the technical solutions of the present invention in conjunction with specific embodiments of the present invention and the corresponding drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0033] The technical solutions provided by various embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0034] Reference Figures 2 to 9 As shown, an embodiment of the utility model provides a capacitive sensor production tooling, which is mainly used for auxiliary positioning during the assembly process of the sensor core. The sensor core includes a sensor base 1 and a diaphragm 2. The sensor base 1 and the diaphragm 2 are relatively positioned by the production tooling, and the diaphragm 2 is fixedly connected to the end face of the sensor base 1 by welding or other fixing methods to complete the assembly processing of the sensor core.

[0035] Reference Figures 2 to 9 As shown, the production tooling mainly includes a base 3, a fixture 4 and a driving part 5.

[0036] The middle part of the base 3 is used to place the sensor base 1. In some practical applications, such as Figure 3 and Figure 7 As shown, a positioning groove 33 is provided in the middle of the base 3. The outer diameter of the sensor base 1 is adapted to the diameter of the positioning groove 33. The sensor base 1 is embedded in the positioning groove 33 to achieve positioning, and the end surface of the sensor base 1 for mounting the diaphragm 2 is set upward.

[0037] There are several clamps 4, which are arranged at the edge of the base 3 and are used to clamp the edge of the diaphragm 2 and can move away from the center of the diaphragm 2. In some practical applications, such as Figure 6 and Figure 7 As shown, several clamps 4 are evenly distributed in a circular shape (for example, there are 6 clamps evenly distributed), and each clamp 4 can move radially along the circular shape, thereby moving away from the center of the diaphragm 2. In the actual production process, the staff will lay the diaphragm 2 flat on the upper end surface of the sensor base 1, and the edge of the diaphragm 2 will extend into the clamp 4. The edges of the diaphragm 2 will be clamped by several clamps 4 respectively. Then, by moving several clamps 4, the diaphragm 2 can be tightened and flattened to facilitate the subsequent fixed connection between the diaphragm 2 and the sensor base 1 (for example, stitch welding). The uniform distribution of several clamps 4 in a circular shape can ensure that the diaphragm 2 is evenly stressed in all directions when the several clamps 4 move, thereby ensuring the flattening effect of the diaphragm 2.

[0038] The driving member 5 cooperates with the clamp 4 to drive the clamp 4 to move away from the center of the diaphragm 2, so that the diaphragm 2 is tightened and flattened. The driving member 5 can be an electric drive, a pneumatic drive, or other forms of drive structure. In some practical applications, such as Figures 3 to 7 As shown, a first guide surface 414 is formed on the inner side of the top of the clamp 4; the driving member 5 is configured as a pressure ring, the lower end of which has an annular side wall, and the outer side of the bottom of the annular side wall is formed with a second guide surface 51 adapted to the first guide surface 414 so that the clamps 4 are forced to move away from the center of the diaphragm 2 simultaneously during the downward movement of the pressure ring. Figure 5As shown, the annular side wall of the pressure ring is placed on the inner side of the clamp 4, and the whole is located on the inner side of the ring formed by several clamps 4. The first guide surface 414 and the second guide surface 51 are beveled surfaces that cooperate with each other and can slide relative to each other; in the initial state, the first guide surface 414 and the second guide surface 51 are in contact with each other, pressing the pressure ring downward in the vertical direction. Under the interaction between the first guide surface 414 and the second guide surface 51, several clamps 4 are simultaneously moved away from the center of the diaphragm 2; therefore, when several clamps 4 clamp the edge of the diaphragm 2, the downward movement of the pressure ring can make the diaphragm 2 tighten and flatten.

[0039] Specifically, at least two guide posts 32 are mounted on the base 3, and positioning holes 52 corresponding to the guide posts 32 are provided on the pressure ring. When the pressure ring moves downward, each guide post 32 is inserted into the corresponding positioning hole 52 and slides with it to ensure the vertical movement of the pressure ring. At the same time, the pressure ring is positioned relative to the center of the inner side of the ring formed by the plurality of clamps 4. This ensures that when the pressure ring moves downward, it can push each clamp 4 to move simultaneously away from the center of the diaphragm 2 to achieve flattening of the diaphragm 2. In some practical applications, the distance that the clamp 4 moves away from the center of the diaphragm 2 is 0.2-0.8 mm, and the preferred distance is 0.5 mm. This ensures that the diaphragm 2 is tensioned and that the diaphragm 2 is not subjected to excessive force and is torn.

[0040] In some practical applications, such as Figure 4 、 Figure 5 、 Figure 7-Figure 9 As shown, the clamp 4 includes a slider 41 and a clamping assembly 42 .

[0041] The slider 41 is slidably disposed within the chute 31 of the base 3. Specifically, the slider 41 includes a slider seat 411, a slider top 412, and a cavity 413. The slider seat 411 slidably fits within the chute 31, achieving a sliding connection between the entire slider 41 and the base 3; the slider top 412 is connected to the slider seat 411 and arranged oppositely; and the cavity 413 is located between the slider seat 411 and the slider top 412. In this embodiment, the first guide surface 414 at the top of the clamp 4, as described above, is located inside the slider top 412. By pressing downwardly with the pressure ring, the second guide surface 51 and the first guide surface 414 move relative to each other, thereby enabling the clamp 4 to move away from the center of the diaphragm 2.

[0042] The clamping assembly 42 is disposed on the slider 41 and is movable relative to the slider 41 to press the edge of the diaphragm 2 against the slider 41. Specifically, the clamping assembly 42 includes a clamping bolt 421 and a clamping block 422. The clamping bolt 421 is threadedly connected to the slider top 412, with its end facing the slider seat 411. The clamping block 422 is located at the end of the clamping bolt 421 and moves with the clamping bolt 421 toward the slider seat 411, thereby pressing the edge of the diaphragm 2 against the slider seat 411. By rotating the clamping bolt 421, the clamping block 422 is pushed to move and press the edge of the diaphragm 2 against the slider seat 411.

[0043] In some practical applications, such as Figure 3 and Figure 9 As shown, based on the above-mentioned clamp 4, the diaphragm 2 is basically circular, and a number of lugs 21 are evenly arranged around its edge; the clamp 4 corresponds to the lugs 21 one by one to achieve clamping of the lugs 21, and the lugs 21 can be smoothly extended into the cavity 413 on the slider 41, so that the lugs 21 of the diaphragm 2 can be pressed against the slider seat 411 through the clamping assembly 42.

[0044] In some practical applications, when the diaphragm 2 is in a taut and flat state, there is a gap 6 (such as Figure 3 ), the gap 6 is 0.05mm-0.2mm, and the preferred gap is 0.1mm.

[0045] refer to Figure 2 、 Figure 3 、 Figure 6 As shown, the production tooling also includes a pressure ring 7, which is mounted on the inner side of the driver 5 and is capable of moving relative to the driver 5, forcing the portion of the diaphragm 2 corresponding to the pressure ring 7 to contact the base 3. Specifically, the pressure ring 7 is threadedly connected to the inner side of the driver 5, or the pressure ring, to enable axial movement of the pressure ring 7 relative to the driver 5. A sliding fit can also be used between the two to achieve axial movement of the pressure ring 7 relative to the driver 5. When the pressure ring 7 is pressed downward, the presence of the gap 6 can push the portion of the diaphragm 2 corresponding to the pressure ring 7 downward and into contact with the base 3, thereby performing a secondary tensioning on the diaphragm 2 and ensuring that the portion of the diaphragm 2 on the sensor base 1 is completely flattened. It should be noted that after the pressure ring 7 moves to the lower limit, a certain force is generated between the sensor base 1 and the diaphragm 2, and a contact mark is formed at the contact point between the two, so that the staff can accurately locate the welding point when welding the diaphragm 2 to the sensor base 1.

[0046] In some practical applications, such as Figure 4 As shown, the portion of the pressure ring 7 that contacts the diaphragm 2 is configured as a rounded surface to prevent the diaphragm 2 from being damaged when the pressure ring 7 presses the diaphragm 2 , thereby affecting the tensioning effect of the diaphragm 2 .

[0047] In some practical applications, such as Figure 6 and Figure 7 As shown, the base 3 is further provided with a plurality of support blocks 34. In some practical applications, the guide pillars 32 are provided on the support blocks 34. When the pressing ring is pressed down to the limit position, the pressing ring abuts against the plurality of support blocks 34 to achieve position limiting. In addition, before the pressing ring is pressed down, a staff member may place an annular spacer 8 on the base 3. Therefore, when the pressing ring is pressed down to the limit position, the lower end of the pressing ring also abuts against the spacer 8. The main function of the spacer 8 is also to limit the position of the pressing ring.

[0048] The above description is merely an embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of the claims of the present invention.

Claims

1. A capacitive sensor production tool, used for relative positioning of a sensor base (1) and a diaphragm (2), so that the diaphragm (2) is located above the end surface of the sensor base (1), characterized in that: The production tooling includes: A base (3), the center of which is used to place the sensor base (1); A plurality of clamps (4) are provided and arranged at the edge of the base (3), for clamping the edge of the diaphragm (2), and capable of moving in a direction away from the center of the diaphragm (2); The driving member (5) cooperates with the clamp (4) to drive the clamp (4) to move in a direction away from the center of the diaphragm (2), so that the diaphragm (2) is tightened and flattened.

2. The capacitive sensor production tooling according to claim 1, characterized in that: The plurality of clamps (4) are evenly distributed in a circular ring shape, and each clamp (4) is capable of moving radially along the circular ring shape, thereby moving away from the center of the diaphragm (2).

3. The capacitive sensor production tooling according to claim 1, characterized in that: The diaphragm (2) is substantially circular, and a plurality of lugs (21) are evenly arranged around its edge; the clamp (4) corresponds to the lugs (21) one by one to achieve clamping of the lugs (21).

4. The capacitive sensor production tooling according to claim 1, characterized in that: The clamp (4) comprises: A slider (41) is slidably disposed in a slide groove (31) of the base (3); The clamping assembly (42) is arranged on the slider (41) and is movable relative to the slider (41) to press the edge of the diaphragm (2) onto the slider (41).

5. The capacitive sensor production tool according to claim 4, characterized in that: The slider (41) comprises: A slider seat (411) is slidably fitted in the slide groove (31); The slider top (412) is connected to the slider seat (411) and arranged opposite to each other; The cavity (413) is located between the slider seat (411) and the slider top (412).

6. The capacitive sensor production tooling according to claim 5, characterized in that: The clamping assembly (42) comprises: A clamping bolt (421) is threadedly connected to the top of the slider (412), with its end facing the slider seat (411); The clamping block (422) is located at the end of the clamping bolt (421) and moves toward the slider seat (411) following the clamping bolt (421) to press the edge of the diaphragm (2) onto the slider seat (411).

7. The capacitive sensor production tooling according to claim 1, characterized in that: A first guide surface (414) is formed on the inner side of the top of the clamp (4); the driving member (5) is configured as a pressure ring, the lower end of the pressure ring has an annular side wall, and the outer side of the bottom of the annular side wall is formed with a second guide surface (51) adapted to the first guide surface so as to force each clamp (4) to move simultaneously away from the center of the diaphragm (2) during the downward movement of the pressure ring.

8. The capacitive sensor production tool according to claim 1, characterized in that: When the diaphragm (2) is in a taut and flattened state, a gap (6) is provided between the diaphragm (2) and the base (3), and the diaphragm (2) is attached to the upper end surface of the sensor base (1).

9. The capacitive sensor production tool according to claim 8, characterized in that: The production tooling also includes: The pressure ring (7) is installed inside the driving member (5) and can move relative to the driving member (5) to force the portion of the diaphragm (2) corresponding to the pressure ring (7) to contact the base (3).

10. The capacitive sensor production tool according to claim 8, characterized in that: The gap (6) is 0.05mm-0.2mm.

11. The capacitive sensor production tool according to claim 7, characterized in that: At least two guide posts (32) are mounted on the base (3), and positioning holes (52) corresponding to the guide posts (32) are provided on the pressure ring; when the pressure ring moves downward, each guide post (32) is inserted into the corresponding positioning hole (52) and slidably engages with the positioning hole.

Images