A temperature compensation positioning tool adapted to different PCB board apertures and its installation method

Abstract

The present invention discloses a temperature compensation positioning tool adapted to different PCB board apertures and an installation method thereof, relating to the technical field of PCB board positioning, comprising a base plate, a plurality of base plate fixing holes arranged orthogonally on the base plate; a shaft body, the lower end of which is inserted into the base plate fixing hole for fixation; a positioning hole clamping assembly, the positioning hole clamping assembly being arranged on the shaft body, and achieving positioning within the hole by pressing the inner side wall of the PCB positioning hole. The present invention can effectively adapt to PCB boards of different apertures through a first clamping arm, a second clamping arm, and a fixed clamping arm, thereby reducing the types of temperature compensation tooling and the corresponding costs; the positioning and installation of PCB boards of different aperture specifications are achieved through internal pressing contact, which is more stable than the prior art method of using a rotating part for adjustment, and also saves operating space on the horizontal plane, is convenient and fast, has high stability, and is simple in structure and low in cost.

Description

Technical Field

[0001] The present invention relates to the technical field of PCB board positioning, and in particular to a temperature compensation positioning tool adapted to different PCB board apertures and an installation method thereof. Background Art

[0002] During the production of inclination sensors, temperature compensation is required for PCBs (printed circuit boards). Positioning fixtures are used to place the PCBs to be temperature-compensated in an oven to achieve output compensation at different temperatures. Currently, PCBs are positioned using positioning holes and matching fixtures. However, the apertures on different PCBs vary, necessitating the use of positioning fixtures of varying sizes. Each PCB aperture requires a correspondingly sized positioning fixture for installation and fixation, significantly increasing the number of positioning fixtures and the associated costs.

[0003] Chinese utility model patent CN207592189U discloses a universal PCB board fixing device that uses multiple adjustable positioning members to achieve PCB board positioning. However, the positioning members are composed of two adjustment plates with mutually adjustable angles. While capable of positioning PCB boards with different hole pitches, the operation is very cumbersome and requires repeated screwing. Moreover, the excessive length of the adjustment plates and the connection method of the screw holes result in unstable positioning of the PCB boards. In addition, the device requires additional positioning members to occupy a large space outside the PCB fixing area, which is not sufficient for the number of PCBs to be positioned. Therefore, a positioning tool that can adapt to different hole diameters, is easy to operate, and saves space is needed. Summary of the Invention

[0004] The purpose of the present invention is to provide a temperature compensation positioning tool and an installation method thereof that are adaptable to different PCB board apertures, so as to solve the above-mentioned technical problems.

[0005] The technical solution adopted in the present invention is as follows:

[0006] A temperature compensation positioning tool adapted to different PCB board apertures, comprising:

[0007] A bottom plate, wherein the bottom plate has a plurality of bottom plate fixing holes arranged in an orthogonal manner;

[0008] A shaft body, the lower end of which is inserted into a fixing hole of the bottom plate and fixed;

[0009] The positioning hole clamping assembly is arranged on the shaft body and realizes positioning in the hole by pressing the inner side wall of the PCB positioning hole.

[0010] Preferably, the positioning hole clamping assembly is configured with at least one grade specification corresponding to the aperture specification of the PCB positioning hole.

[0011] Preferably, the positioning hole clamping assembly includes a first clamp arm, a second clamp arm and a fixed clamp arm which are respectively axially sleeved on the shaft body, a linear spring in a pre-compressed state is connected between the first clamp arm and the second clamp arm, and the outer ends of the first clamp arm, the second clamp arm and the fixed clamp arm are respectively squeezed into contact with three different contact points on the inner wall of the PCB positioning hole to achieve positioning.

[0012] As a further preference, the fixed arm is fixedly connected to the shaft body and can be adjusted in direction as the shaft body rotates.

[0013] As a further preference, the first clamp arm and the second clamp arm have the same structure, and both the first clamp arm and the second clamp arm include a sleeve portion rotatably sleeved on the shaft body and a crimping portion for extruding and contacting the inner side wall of the PCB positioning hole.

[0014] As a further preference, the sleeve connection portion is annular, the crimping portion and the sleeve connection portion are integrally formed, and the crimping portion and the outer contour of the sleeve connection portion are smoothly connected.

[0015] As a further preference, the outer contour of the crimping portion is composed of two arcs with different curvature radii, and the curvature radius of the back outer contour line of the crimping portion is greater than the curvature radius of the abdomen outer contour line, so that an outward-turned nozzle is formed at the outer end.

[0016] As a further preference, the outer ends of the first clamp arm, the second clamp arm and the fixed clamp arm are provided with a plurality of anti-slip protrusions or anti-slip rubber layers on the pressing contact surfaces with the inner side wall of the PCB positioning hole.

[0017] As a further preference, the aperture D of the PCB positioning hole satisfies the following conditions:

[0018] ;

[0019] in, is the distance between the axis of the shaft and the outer end of the fixed arm, is the distance between the axis of the shaft and the outer end of the first clamp arm or the second clamp arm, It is the maximum direction angle set between the first clamp arm or the second clamp arm and the fixed clamp arm.

[0020] A method for installing a temperature compensation positioning tool adapted to different PCB board apertures, the method for installing and using the temperature compensation positioning tool comprising the following steps:

[0021] Step S1: inserting the same number of shafts as the PCB positioning holes into the bottom plate fixing holes;

[0022] Step S2: determining the grade specification of the corresponding positioning hole clamping component according to the aperture of the PCB positioning hole;

[0023] Step S3: rotating the shaft so that the direction of the fixed arm faces the center of the PCB board, and pressing the linear spring inward so that the first arm, the second arm, and the fixed arm all enter the inner space of the PCB positioning hole;

[0024] Step S4: Release the linear spring, so that the first and second clamp arms extend outward and press against the inner wall of the PCB positioning hole. At the same time, the outer end of the fixed clamp arm presses against the inner wall of the PCB positioning hole to complete positioning in the hole and then enter the oven to complete the temperature compensation process.

[0025] The above technical solution has the following advantages or beneficial effects:

[0026] (1) The present invention can effectively adapt to PCB boards with different apertures through the first clamping arm, the second clamping arm and the fixed clamping arm, so as to achieve the purpose of reducing the types of temperature compensation tooling and the corresponding costs.

[0027] (2) The present invention realizes the positioning and installation of PCB boards with different hole diameter specifications by means of in-hole pressing contact. Compared with the prior art method of adjusting by rotating parts, it is more stable and saves the operating space on the horizontal plane. It is convenient, fast, and highly stable. At the same time, it has a simple structure and low cost.

[0028] (3) In the present invention, a linear spring is provided between the first clamp arm and the second clamp arm, so that the first clamp arm and the second clamp arm can be automatically opened, and the first clamp arm and the second clamp arm can automatically abut against the side wall of the PCB positioning hole, which is easy to operate and improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the structure of the positioning hole clamping assembly and the shaft body in the present invention;

[0030] Figure 2 It is a structural schematic diagram of the positioning hole clamping assembly in the present invention;

[0031] Figure 3 It is a structural schematic diagram of the bottom plate of the present invention;

[0032] Figure 4 This is a schematic diagram of the structure of the positioning hole clamping assembly and the PCB positioning hole in the present invention;

[0033] Figure 5 This is a front view of the first clamping arm in the present invention;

[0034] Figure 6 is a top view of the first clamping arm in the present invention;

[0035] Figure 7 This is a front view of the second clamping arm in the present invention;

[0036] Figure 8 It is a structural schematic diagram of the fixed clamp arm in the present invention;

[0037] Figure 9 This is a diagram showing the use of the temperature compensation positioning tooling adapted to different PCB board apertures in the present invention;

[0038] Figure 10 yes Figure 9 Enlarged view of point A in the middle.

[0039] In the figure: 1. Base plate; 101. Base plate fixing hole; 2. Shaft; 3. Positioning hole clamping assembly; 301. First clamping arm; 302. Second clamping arm; 303. Fixed clamping arm; 304. Linear spring; 305. Socket part; 306. Pressing part; 307. Anti-slip rubber layer; 4. PCB board; 401. PCB positioning hole. DETAILED DESCRIPTION

[0040] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0041] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like indicate positions or locations based on those shown in the accompanying drawings. These terms are intended solely to facilitate and simplify the description of the present invention and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not intended to indicate or imply relative importance.

[0042] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific contexts.

[0043] Figure 1 This is a schematic diagram of the structure of the positioning hole clamping assembly and the shaft body in the present invention; Figure 2 It is a structural schematic diagram of the positioning hole clamping assembly in the present invention; Figure 3 It is a structural schematic diagram of the bottom plate of the present invention; Figure 4 This is a schematic diagram of the structure of the positioning hole clamping assembly and the PCB positioning hole in the present invention; Figure 5 This is a front view of the first clamping arm in the present invention; Figure 6 is a top view of the first clamping arm in the present invention; Figure 7 This is a front view of the second clamping arm in the present invention; Figure 8 It is a structural schematic diagram of the fixed clamp arm in the present invention; Figure 9 This is a diagram showing the use of the temperature compensation positioning tooling adapted to different PCB board apertures in the present invention; Figure 10 yes Figure 9 Magnified view of point A in the middle. Figures 1 to 10 FIG. 1 shows a preferred embodiment of a temperature compensation positioning tool adapted to different PCB board 4 apertures, including:

[0044] The bottom plate 1 has a plurality of bottom plate fixing holes 101 arranged orthogonally.

[0045] The shaft body 2, the lower end of the shaft body 2 is inserted into the bottom plate fixing hole 101 and fixed.

[0046] The positioning hole clamping assembly 3 is arranged on the shaft body 2 and achieves positioning within the hole by pressing the inner side wall of the PCB positioning hole 401. In this embodiment, as shown in Figure 3, the base plate fixing holes 101 on the base plate 1 are arranged orthogonally, and the number of base plate fixing holes 101 is provided. The specific number of base plate fixing holes 101 and the specific number of columns and rows can be selected as needed. The lower end of the shaft body 2 is detachably connected to the base plate fixing hole 101. In other preferred embodiments, the inner wall of the base plate fixing hole 101 can be provided with raised rubber particles to increase the friction between the shaft body 2 and the base plate fixing hole 101, making the shaft body 2 more stable after installation. The positioning hole clamping assembly 3 is provided on the outer edge of the shaft body 2, and the positioning hole clamping assembly 3 is located within the PCB positioning hole 401 on the PCB board 4 and abuts against the inner wall of the PCB positioning hole 401 to achieve positioning of the PCB board 4, facilitating the subsequent temperature compensation process.

[0047] Furthermore, as a preferred embodiment, the positioning hole clamping assembly 3 is configured with at least one grade specification corresponding to the aperture specification of the PCB positioning hole 401. The size of the positioning hole clamping assembly 3 in this embodiment can be configured based on the aperture size of the PCB positioning hole 401, so that the positioning hole clamping assembly 3 can abut against the inner wall of the PCB positioning hole 401 to achieve positioning of the PCB board 4.

[0048] Among them, the aperture of the PCB positioning hole 401 is generally between 2-3 mm, and its specifications are generally 2.0 mm, 2.4 mm, 2.6 mm, 2.8 mm and 3.0 mm. Therefore, the opening angle formed between the first clamping arm 301 and the second clamping arm 302 is generally less than 30 degrees. The grade specification (i.e., the applicable aperture range) of the positioning hole clamping component 3 is determined by the aperture of the PCB positioning hole 401. For example, the grade specification of the positioning hole clamping component 3 can be 1.8-2.2 mm, 2.4-3.2 mm, etc.

[0049] Furthermore, as a preferred embodiment, the positioning hole clamping assembly 3 includes a first clamping arm 301, a second clamping arm 302 and a fixed clamping arm 303 respectively sleeved on the shaft body 2 along the axial direction, and a linear spring 304 in a pre-compressed state is connected between the first clamping arm 301 and the second clamping arm 302. The outer ends of the first clamping arm 301, the second clamping arm 302 and the fixed clamping arm 303 are respectively pressed into contact with three different contact points on the inner wall of the PCB positioning hole 401 to achieve positioning. In this embodiment, see Figure 2 As shown, the fixed clamp arm 303 is fixedly connected to the shaft body 2, and the fixed clamp arm 303 can rotate along with the rotation of the shaft body 2, so as to facilitate adjustment of the position of the fixed clamp arm 303, and the first clamp arm 301 and the second clamp arm 302 are rotatably connected to the shaft body 2, for details, see Figure 2 As shown, the linear spring 304 provided between the first arm 301 and the second arm 302 is used to spread the first arm 301 and the second arm 302 apart, so that the first arm 301 and the second arm 302 can abut against the inner wall of the PCB positioning hole 401. The first arm 301, the second arm 302 and the fixed arm 303 can contact the inner wall of the PCB positioning hole 401 at three different positions, see Figure 4 As shown, the three contact points are connected to form a triangle to achieve positioning of the PCB board 4, and this arrangement can increase the stability of the PCB board 4 after it is fixed.

[0050] Furthermore, as a preferred embodiment, the fixed clamp arm 303 is fixedly connected to the shaft body 2 and can be adjusted in direction as the shaft body 2 rotates. Figure 10 As shown, when in use, the positioning hole clamping assembly 3 is located in the PCB positioning hole 401 , and the fixed clamping arm 303 in the positioning hole clamping assembly 3 always points to the center position of the PCB board 4 .

[0051] Furthermore, as a preferred embodiment, the first arm 301 and the second arm 302 have the same structure, each comprising a sleeve portion 305 rotatably sleeved on the shaft 2 and a crimping portion 306 for compressing against the inner wall of the PCB positioning hole 401. A linear spring 304 is disposed between the crimping portion 306 of the first arm 301 and the second arm 302, and is connected to the crimping portion 306 of the first arm 301 and the second arm 302.

[0052] In this embodiment, see Figure 9 As shown, the base plate 1 utilizes a rectangular plate-like structure, with base plate fixing holes 101 distributed throughout the base plate 1. During use, the base plate fixing holes 101 located at the corners of the base plate 1 are preferentially selected for installation of the shaft 2. This installation method facilitates the orderly installation of the PCB 4 on the base plate 1. Specifically, during use, the shaft 2 is preferentially installed within the PCB positioning holes 401 located at the four corners of the PCB 4. The remaining PCB positioning holes 401 can be installed with the shaft 2 as needed. The shaft 2 is then rotated, causing it to rotate the fixed arm 303 to a position aligned with the center of the PCB 4. The opening formed between the first arm 301 and the second arm 302 is oriented in the opposite direction of the fixed arm 303. After the position of the fixed arm 303 is adjusted, the crimping portion 306 of the first arm 301 and the crimping portion 306 of the second arm 302 are squeezed, bringing the first arm 301 and the second arm 302 closer together and squeezing the linear spring 304. During the squeezing process, the opening formed between the first arm 301 and the second arm 302 gradually shrinks, facilitating the entry of the first arm 301 and the second arm 302 into the PCB positioning hole 401. The first arm 301 and the second arm 302 are then released, causing them to open outward under the elastic force of the pre-compressed linear spring 304. The elastic force of the linear spring 304 presses the ends of the first arm 301, the second arm 302, and the fixed arm 303 against the inner wall of the PCB positioning hole 401. At the same time, the anti-slip protrusions or the anti-slip rubber layer 307 increase friction, ensuring the stability of the support and positioning. After the PCB board 4 is fixed on the bottom plate 1 , the bottom plate 1 together with the PCB board 4 to be temperature-compensated is placed in an oven to complete the temperature-compensating operation.

[0053] Furthermore, as a preferred embodiment, the sleeve portion 305 is annular, the crimping portion 306 and the sleeve portion 305 are integrally formed, and the outer contours of the crimping portion 306 and the sleeve portion 305 are smoothly connected.

[0054] Furthermore, as a preferred embodiment, the outer contour of the crimping portion 306 is composed of two arcs with different curvature radii, and the curvature radius of the back outer contour line of the crimping portion 306 is greater than the curvature radius of the abdomen outer contour line, so that an outward-turned clamping nozzle is formed at the outer end. In this embodiment, see Figure 4 As shown, the back outer contour line refers to the contour line of the side where the two crimping portions 306 are close to each other, and the abdomen outer contour line refers to the contour line of the side where the two crimping portions 306 are away from each other.

[0055] Furthermore, as a preferred embodiment, the outer ends of the first clamp arm 301, the second clamp arm 302 and the fixed clamp arm 303 are provided with a plurality of anti-slip protrusions or anti-slip rubber layers 307 on the pressing contact surface with the inner wall of the PCB positioning hole 401. Figure 2 As shown, the anti-skid protrusions or anti-skid rubber layer 307 are specifically provided at the ends of the first arm 301, the second arm 302, and the fixed arm 303 (the end away from the shaft body 2). The provision of the anti-skid protrusions or anti-skid rubber layer 307 can increase the friction between the first arm 301, the second arm 302, and the fixed arm 303 and the inner sidewall of the PCB positioning hole 401, thereby ensuring the stability of the PCB board 4 after installation.

[0056] Furthermore, as a preferred embodiment, the aperture D of the PCB positioning hole 401 satisfies the following conditions:

[0057] ;

[0058] in, is the distance between the axis of the shaft body 2 and the outer end of the fixed clamp arm 303, is the distance between the axis of the shaft body 2 and the outer end of the first clamping arm 301 or the second clamping arm 302, It is the maximum direction angle set between the first clamping arm 301 or the second clamping arm 302 and the fixed clamping arm 303.

[0059] The following only describes a preferred installation method of the present invention, and does not limit the scope of protection of the present invention.

[0060] A method for installing a temperature compensation positioning tool adapted to different PCB board apertures includes the following steps:

[0061] Step S1: inserting the same number of shafts 2 as the PCB positioning holes 401 into the bottom plate fixing holes 101 .

[0062] Step S2: Determine the grade specification of the corresponding positioning hole clamping component 3 according to the aperture of the PCB positioning hole 401 .

[0063] Step S3: Rotate the shaft 2 so that the direction of the fixed arm 303 faces the center of the PCB board 4, and squeeze the linear spring 304 inward so that the first arm 301, the second arm 302 and the fixed arm 303 all enter the internal space of the PCB positioning hole 401.

[0064] Step S4: Release the linear spring 304, so that the first clamp arm 301 and the second clamp arm 302 extend outward and press the inner wall of the PCB positioning hole 401. At the same time, the outer end of the fixed clamp arm 303 presses the inner wall of the PCB positioning hole 401 to complete the positioning in the hole and then enter the oven to complete the temperature compensation process.

[0065] The above description is only a preferred embodiment of the present invention and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A temperature compensation positioning tool adapted to different PCB board apertures, characterized in that: include: A bottom plate, wherein the bottom plate has a plurality of bottom plate fixing holes arranged in an orthogonal manner; A shaft body, the lower end of which is inserted into a fixing hole of the bottom plate and fixed; A positioning hole clamping assembly is provided on the shaft body and realizes positioning in the hole by pressing the inner side wall of the PCB positioning hole; The positioning hole clamping assembly includes a first clamping arm, a second clamping arm and a fixed clamping arm respectively axially sleeved on the shaft body, a linear spring in a pre-compressed state is connected between the first clamping arm and the second clamping arm, and the outer ends of the first clamping arm, the second clamping arm and the fixed clamping arm are respectively squeezed into contact with three different contact points on the inner side wall of the PCB positioning hole to achieve positioning.

2. The temperature compensation positioning tool adapted to different PCB board apertures according to claim 1, characterized in that: The positioning hole clamping assembly is configured with at least one grade specification corresponding to the aperture specification of the PCB positioning hole.

3. The temperature compensation positioning tool adapted to different PCB board apertures according to claim 1, characterized in that: The fixed clamping arm is fixedly connected to the shaft body and can be rotated with the shaft body to adjust its direction.

4. The temperature compensation and positioning tool adapted to different PCB board apertures according to claim 1, characterized in that: The first clamp arm and the second clamp arm have the same structure. Both the first clamp arm and the second clamp arm include a sleeve portion rotatably sleeved on the shaft body and a press portion for pressing and contacting the inner side wall of the PCB positioning hole.

5. The temperature compensation positioning tool adapted to different PCB board apertures according to claim 4, characterized in that: The sleeve connection portion is annular, the crimping portion and the sleeve connection portion are integrally formed, and the crimping portion and the outer contour of the sleeve connection portion are smoothly connected.

6. The temperature compensation positioning tool adapted to different PCB board apertures according to claim 5, characterized in that: The outer contour of the crimping portion is composed of two arcs with different curvature radii, and the curvature radius of the back outer contour line of the crimping portion is greater than the curvature radius of the abdomen outer contour line, so that an outward-turned clamping nozzle is formed at the outer end.

7. The temperature compensation positioning tool adapted to different PCB board apertures according to claim 1, characterized in that: The outer ends of the first clamp arm, the second clamp arm and the fixed clamp arm are all provided with a plurality of anti-slip protrusions or anti-slip rubber layers on the pressing contact surfaces with the inner side wall of the PCB positioning hole.

8. The temperature compensation and positioning tool adapted to different PCB board apertures according to claim 1, characterized in that: The aperture D of the PCB positioning hole meets the following conditions: ； in, is the distance between the axis of the shaft and the outer end of the fixed arm, is the distance between the axis of the shaft and the outer end of the first clamp arm or the second clamp arm, It is the maximum direction angle set between the first clamp arm or the second clamp arm and the fixed clamp arm.

9. A method for installing a temperature compensation positioning tool adapted to different PCB board apertures, characterized in that: The temperature compensating positioning tool adapted to different PCB board apertures as described in claim 1 is provided, and the installation method of the temperature compensating positioning tool comprises the following steps: Step S1: inserting the same number of shafts as the PCB positioning holes into the bottom plate fixing holes; Step S2: determining the grade specification of the corresponding positioning hole clamping component according to the aperture of the PCB positioning hole; Step S3: rotating the shaft so that the direction of the fixed arm faces the center of the PCB board, and pressing the linear spring inward so that the first arm, the second arm, and the fixed arm all enter the inner space of the PCB positioning hole; Step S4: Release the linear spring, so that the first and second clamp arms extend outward and press against the inner wall of the PCB positioning hole. At the same time, the outer end of the fixed clamp arm presses against the inner wall of the PCB positioning hole to complete positioning in the hole and then enter the oven to complete the temperature compensation process.

Images