CN115962197A - Board-to-board positioning device - Google Patents

Abstract

The invention provides a plate-to-plate positioning device, wherein a through shaft hole is arranged in a base, at least one through hole is arranged on the inner wall surface of the base in a vertical direction and penetrates outwards, a limiting ball is arranged on the limiting ball, one side of the outer part of the base is provided with a connecting part, the other side of the outer part of the base is provided with at least one limiting groove opposite to the through hole, an operation space in an adjusting knob penetrates out of the base, the connecting part on one side of the base is exposed out of the operation space, a sliding wall in the operation space faces to the through hole, a driving part is opposite to the limiting part, the sliding wall is provided with a pressing side and a withdrawing side with different wall thicknesses and can push the limiting ball into and out of the through hole, the driving part is convexly provided with at least one clamping convex body which slides in and out of the limiting groove by rotating along the limiting part, and a mark part is arranged outside the adjusting knob opposite to the clamping convex body, so that the aim of locking or unlocking of the positioning device is convenient to operate.

Description

Board-to-Board Positioning Device

technical field

The invention relates to a board-to-board positioning device, especially a positioning device that is convenient for identifying the locked or unlocked state. An adjustment knob is covered on the outside of the base, and the adjustment knob can be rotated to drive the displacement of the limiting sphere inside the base. , and by adjusting the identification part set on the outer edge of the knob, the purpose of conveniently operating the positioning device for locking or unlocking is achieved.

Background technique

General boards (board-to-board) are locked by positioning screws with knobs, collars and screws when they are assembled and joined. The screws and collars are fixed on the outer panel first, and the knobs are turned first. The panel for the screw to be locked into the inner layer forms a preset position, and then the screw is locked with a hand tool, so that the outer panel and the inner panel are locked into one body. The locking mode of this multi-layer board body is It can be used for working machines or other board-to-board connections; however, these working machines need to use plates for locking, mostly for power devices or speed adjustment devices, and various power devices and speed adjustment devices are Located inside the space formed by the tool shell, the plates can be assembled, locked, and disassembled. When the power device crashes, malfunctions, or is damaged, or the rate adjustment device changes or adjusts the rate, the plates can be unloaded. In addition to related maintenance and adjustment operations, the board is locked by multiple positioning screws, so it is easy to cause the positioning screws to fall off or be lost during the disassembly process, and the board cannot be re-locked back to its original position, affecting assembly. The inconvenience and trouble of dismantling work, that is, in order to solve the shortcoming that the locking screw is easy to lose, some operators have developed a fixing device composed of a cap, a screw part and a positioning seat. First, the positioning seat of the fixing device is fastened to the plate In the perforation of the plate, the screw part is locked to another plate to form a fixation. When the user removes the plate, the fixing device can still be fixed in the perforation of the plate through the positioning seat, so that the fixing device will not fall off or be lost. However, in the assembly process, the user must apply force or use hand tools (such as a screwdriver or wrench, etc.) to control the locking or dismounting of the fixing device, and there are still many shortcomings and problems in practical applications.

However, when two opposite plates are combined by locking and fixing, under the requirements of mass production and processing efficiency that emphasize modularization today, the cumbersome manual assembly process using screws will seriously affect the progress of the manufacturer's shipment, and Due to the small size of the screw, it is easy to lose during the process of locking the second plate, and because of the difference in the size of the screw hole at the position where the screw is locked, or the number of teeth and the pitch of the screw hole do not match, it will cause difficulties in assembly, alignment or locking. , and the space between the two opposite plates for operating the screws is quite narrow, that is, when the screws are assembled and disassembled, they are easily obstructed by surrounding objects, which will not only consume a lot of time and inconvenience, but will also lead to an increase in the overall cost. increase the burden on the industry.

To sum up, how to solve the problems and troubles that the fixing devices used in the current plate locking are easy to be loosened and disengaged by wrong rotation, and the fixing devices need to apply force or use hand tools when assembling. Relevant manufacturers engaged in this industry are eager to study the direction of improvement.

Contents of the invention

In view of the above problems and shortcomings, the main purpose of the present invention is to provide a board-to-board positioning device.

In order to achieve the above object, the technical scheme adopted in the present invention is:

A board-to-board positioning device, including a base and an adjustment knob, characterized in that:

The inside of the base has a through shaft hole, and the inner wall of the shaft hole is provided with at least one through hole penetrating to the outside in the direction perpendicular to the shaft hole. The two sides are respectively provided with a connecting part and a limiting part, and the limiting part is provided with at least one limiting groove opposite to the outside of the at least one through hole; and

The adjustment knob covers the outside of the base, and the inside is provided with an operation space for the base to pass through, and the connecting part on one side of the base is exposed outside the operation space, and inside the operation space are respectively provided with a pair of The sliding wall surface located at the at least one through hole is opposite to the driving part located at the limiting part, and the sliding wall surface is provided with a pressing side for pushing at least one limiting sphere into and out of the at least one through hole, On the withdrawal side, the driving part is provided with at least one clamping protrusion that rotates and slides along the limiting part and enters and exits the at least one limiting groove. There is a logo part on the outside.

The board-to-board positioning device, wherein: the base is provided with at least two opposite through-holes penetrating outwards in the direction perpendicular to the shaft hole on at least two opposite walls of the shaft hole inside, and at least The position-limiting spheres are movably installed in the two oppositely arranged through-holes, and the position-limiting portion on the outer side of the base is provided with two relative position-limiting grooves respectively aligned with the at least two oppositely disposed through-holes, And the other two opposite sides of the adjacent preset angles of the two relative limiting grooves are respectively provided with a suspension card groove.

The board-to-board positioning device, wherein: the preset angle is between 60°-120°, preferably 90°.

The board-to-board positioning device, wherein: the connection part on one side of the base includes a sleeve ring for the limit washer to be sleeved, and an embedding ring for the preset first board to be embedded and positioned in the first positioning hole. groove.

The board-to-board positioning device, wherein: the operating space inside the adjustment knob includes two adjacent stacked sliding wall surfaces and the driving part, so that the connecting part on one side of the base can pass through the driving part. The sliding wall surface exposes the outside of the adjustment knob, and the operating space is provided with two adjacent stacked sliding wall surfaces and the driving part, and the sliding wall surface is provided at the clamping protrusion of the driving part. There is the pressing side with a smaller inner diameter, and a withdrawal side with a larger inner diameter is arranged adjacent to the pressing side, and the inner diameters of the pressing side and the retreating side are both smaller than the size of the operating space.

The board-to-board positioning device, wherein: the outside of the adjustment knob is provided with a marking part in the form of a protruding rod, a marking part in the shape of a cylinder, or a marking part in the shape of a plate.

A board-to-board positioning device, including a base, an adjustment knob, and a shaft seat for the shaft hole of the base to be sleeved and inserted, and is characterized in that:

The inside of the base has a through shaft hole, and the inner wall of the shaft hole is provided with at least one through hole penetrating to the outside in the direction perpendicular to the shaft hole. The two sides are respectively provided with a connecting part and a limiting part, and at least one limiting groove corresponding to the at least one through hole is arranged on the limiting part;

The adjustment knob covers the outside of the base, and the inside is provided with an operation space for the base to pass through, and the connecting part on one side of the base is exposed outside the operation space, and inside the operation space are respectively provided with a pair of The sliding wall surface located at the at least one through hole is opposite to the driving part located at the limiting part, and the sliding wall surface is provided with a pressing side and a retreating side for pushing at least one limiting sphere into and out of the at least one through hole. From the side, the driving part is protruded with at least one locking protrusion that rotates and slides along the limiting part and enters and exits the at least one limiting groove, and is outside the adjustment knob relative to the at least one locking protrusion. has a signage department; and

The shaft seat includes a seat body located outside the base, and a shaft rod extending outward from one side of the seat body for the shaft hole of the base to be sleeved and passed through. The stop body at the through hole, and the shaft rod between the stop body and the seat body is provided with a concave ring groove for aligning the at least one through hole, and the concave ring groove is used for positioning the at least one through hole At least one of the limiting spheres inside is actively locked or withdrawn.

The board-to-board positioning device, wherein: the shaft seat includes the seat body whose outer diameter is larger than the outer diameter of the base and smaller than the outer diameter of the adjustment knob, and extends outward from one side of the seat body and has an outer diameter smaller than the shaft hole. The shaft rod, and the shaft rod is provided with a connecting side on the side opposite to the seat body for the second positioning hole of the preset second plate to be embedded and fixed.

The board-to-board positioning device, wherein: the shaft seat has the shaft rod extending outward from one side of the seat body, and the side of the stopper body provided on the floating side of the shaft rod is provided with a cone-shaped inclined extension To the first inclined guide surface at the concave ring groove, the other side of the stop body is provided with a second inclined guide surface that is tapered outward.

The advantage of the present invention is to provide a board-to-board positioning device, the outside of the base is covered with an adjustment knob, which can be used to rotate the adjustment knob to drive the displacement of the limit ball inside the base, and the identification part set on the outer edge of the adjustment knob , can conveniently operate the positioning device for locking or unlocking.

Description of drawings

Fig. 1 is a perspective view of the present invention.

Fig. 2 is a three-dimensional exploded view of the present invention.

Fig. 3 is a three-dimensional exploded view of another viewing angle of the present invention.

Figure 4 is a side sectional view of the present invention.

Fig. 5 is a top view of the shaft seat and the adjustment knob of the present invention before being rotated.

Fig. 6 is a top view of the shaft seat and the adjusting knob of the present invention after being rotated.

Fig. 7 is a side sectional view of a preferred embodiment of the present invention.

Explanation of reference numerals: 1-base; 10-shaft hole; 101-through hole; 1011-resisting ring; 11-limiting sphere; 12-connecting part; Limit washer; 122-embedding groove; 13-limiting part; 130-limiting groove; 131-pause card groove; 2-adjusting knob; 20-operating space; 212-Retreat side; 22-Drive part; 221-Clamping convex body; 23-Identification part; 3-First plate; 30-First positioning hole; 4-Axis seat; 41-Seat body; ; 42-shaft rod; 420-recessed ring groove; 421-stop body; 4211-first guide slope; 4212-second guide slope; 5-second plate;

Detailed ways

In order to achieve the above-mentioned purpose and effect, the technical means adopted in the present invention and its structure, methods of implementation, etc., in conjunction with the accompanying drawings, describe in detail and describe its features and functions as follows for preferred embodiments of the present invention:

Please refer to Fig. 1, Fig. 2, Fig. 3, and Fig. 4, which are the three-dimensional appearance diagram, the three-dimensional exploded view, the three-dimensional exploded view of another viewing angle, and the side sectional view of the present invention, as shown in the figure, it can be clearly seen , the board-to-board positioning device of the present invention includes a base 1 and an adjustment knob 2, wherein:

The inside of the base 1 has a through shaft hole 10, and at least one through hole 101 is provided on the inner wall of the shaft hole 10 to pass through the outside in the direction perpendicular to the shaft hole 10, and at least one through hole 101 adjacent to the shaft hole 10 The periphery of the hole edge is provided with a resisting ring 1011 that reduces the aperture inwardly, and a limiting sphere 11 is installed inside the at least one through hole 101, and at least one limiting sphere 11 is located inside the at least one through hole 101 The stop ring 1011 around the hole edge can effectively prevent at least one limit sphere 11 from falling into the shaft hole 10, and the two sides outside the base 1 are respectively provided with a connecting part 12 and a limit part 13, and At least one limiting groove 130 is provided on the limiting portion 13 for being located outside the at least one through hole 101 .

The adjustment knob 2 is covered on the outside of the base 1, and an operating space 20 is provided inside for the base 1 to pass through. The sliding wall 21 and the driving part 22 are stacked adjacently, and the sliding wall 21 is opposite to at least one through hole 101, and the driving part 22 is opposite to the limit part 13, and the sliding wall 21 is provided with different inner diameters adjacent to each other. The pressing side 211 and the retreating side 212 of the pressing side 211 and the retreating side 212 are used to push at least one limit ball 11 into and out of at least one through hole 101, and the driving part 22 is protruded with at least one locking mechanism. The convex body 221 can be used for at least one clamping convex body 221 to rotate and slide along the limiting part 13 to enter and exit the at least one limiting groove 130. There is an identification part 23 .

The above-mentioned base 1 can be provided with at least two mutually symmetrical through-holes 101 on at least two opposite walls of the inner shaft hole 10 in the direction perpendicular to the shaft hole 10, and each through-hole 101 is respectively movable to install a limit position. The sphere 11, and the limit part 13 on the outer side of the base 1 is respectively provided with two relative limit grooves 130, which are located at least two mutually symmetrically arranged through holes 101, and at the adjacent preset angles of the two relative limit grooves 130 The other two opposite sides are respectively provided with suspension card slots 131, then the preset angle can be between 60°～120°, and a better preset angle can be 90°, and the connecting part on one side of the base 1 12 includes a sleeve ring 121 for the limit washer 1211 to be sleeved on, and an embedding groove 122 for embedding and positioning the first board 3 with the first positioning hole 30 .

In addition, the internal operation space 20 of the adjustment knob 2 includes two adjacent stacked sliding wall surfaces 21 and a driving part 22, so that the connecting part 12 on one side of the base 1 is penetrated by the driving part 22 through the sliding wall surface 21 to be exposed for adjustment. The outer side of the knob 2, and the sliding wall 21 is provided with a pressing side 211 with a smaller inner diameter (R1) opposite to the clamping convex body 221 of the driving part 22, and the adjacent pressing side 211 is provided with a larger inner diameter (R2) On the withdrawal side 212, the outside of the adjustment knob 2 is provided with a protruding rod body, a cylinder or a plate-shaped marking part 23, etc., and the inner diameters of the pressing side 211 and the withdrawal side 212 are both smaller than the operating space 20 size.

Furthermore, please refer to Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, and Fig. 7, which are the three-dimensional exploded view of the present invention, the three-dimensional exploded view of another angle of view, the side sectional view, the shaft seat and the adjustment The top view before the knob is rotated, the top view of the shaft seat and the adjustment knob after the rotation, and the side view sectional view of the preferred embodiment, the board-to-board positioning device of the present invention further includes a base 1, an adjustment knob 2 and a shaft seat 4, in:

The base 1 has a through shaft hole 10 inside, and on the inner wall of the shaft hole 10, there are two opposite through holes 101 that pass through the outside in the direction perpendicular to the shaft hole 10, and the inside of the two opposite through holes 101 are respectively A limiting sphere 11 is installed, and a connecting part 12 and a limiting part 13 are respectively provided on the two sides outside the base 1, and the limiting part 13 is provided with two oppositely arranged limiting grooves 130 opposite to each other. outside of the via 101.

The adjustment knob 2 is covered on the outside of the base 1, and an operating space 20 is provided inside for the base 1 to pass through, and the connecting portion 12 on one side of the base 1 is exposed outside the operating space 20, and the annular hole for the limit washer 1211 is provided. 1210 is sleeved and fixed on the sleeve ring 121 of the connecting part 12, and then assembled and positioned at the embedding groove 122 of the connecting part 12 for the first positioning hole 30 of the preset first plate 3, and the stop washer 1211 is used to stop Block the bottom of the adjustment knob 2 to prevent the adjustment knob 2 from detaching from the base 1, allowing the base 1 to be set in the operation space 20 of the adjustment knob 2, and adjacent stacked sliding walls 21 are respectively provided inside the operation space 20 , the driving part 22, and the sliding wall surface 21 is located at least one through hole 101, the driving part 22 is located at the limit part 13, and the sliding wall surface 21 is provided with adjacent side by side pressing side 211 and withdrawal side 212, By using the pressing side 211 and the retreating side 212 to push the two limiting spheres 11 to slide in the two oppositely arranged through holes 101, part of the volume of the two limiting spheres 11 can enter the shaft hole 10 respectively, and Stopped by the resisting ring 1011 around the inner edge of the two through-holes 101, the limiting ball 11 can be prevented from falling into the shaft hole 10, and the driving part 22 is protruded with at least one clamping convex body 221, which can At least one clamping protrusion 221 is allowed to rotate and slide along the limiting portion 13 to enter and exit the at least one limiting groove 130 , and an identification portion 23 is provided on the outside of the adjustment knob 2 opposite to the at least one locking protrusion 221 .

The shaft seat 4 includes a seat body 41 located outside the base 1, and a shaft 42 extending outward from the side of the seat body 41 penetrates into the shaft hole 10 of the base 1, and a stopper is provided on the suspended side of the shaft 42. 421 can pass through at least one through hole 101, and then a concave ring groove 420 is provided at the shaft 42 between the stopper body 421 and the seat body 41, and at least one through hole 101 is aligned through the concave ring groove 420, and is used for positioning The limiting ball 11 in the through hole 101 is movably locked or withdrawn from the concave ring groove 420 .

The outer diameter of the seat body 41 of the above-mentioned shaft seat 4 is greater than the outer diameter of the base 1 and smaller than the outer diameter of the adjustment knob 2, and the outer diameter of the shaft 42 extending outward from the seat body 41 side is smaller than the shaft hole, and relative to the shaft. 42 is provided with a connecting side 411 on the other side of the seat body 41, which is used for embedding and fixing the second positioning hole 50 of the second plate 5. One side of the stop body 421 provided on the floating side is provided with a conically inclined first guide slope 4211 extending to the concave ring groove 420, and a cone-shaped slope is provided on the other side of the stop body 421 relative to the first guide slope 4211. The second guide slope 4212 is inclined outward.

The above-mentioned shaft seat 4 can use the shaft 42 on one side of the seat body 41 to pass through the operating space 20 of the adjustment knob 2, and then penetrate into the shaft hole 10 of the base 1. When the stop body 421 on the side of the shaft 42 enters the shaft hole 10, each limiting sphere 11 can be pushed into each through hole 101 through the second guide inclined surface 4212 on the side of the stopper body 421, so that the shaft rod 42 and the stopper body 421 can smoothly penetrate into the shaft hole 10 .

Then, when the board-to-board positioning device of the present invention is actually applied and implemented, the adjustment knob 2 can be rotated, and at least one clamping protrusion 221 of the outer marking part 23 of the adjustment knob 2 relative to the inner driving part 22 can be used for at least one One clamping protrusion 221 is rotated to the limit groove 130 of the limiting portion 13 of the base 1, and at least one clamping protrusion 221 is stacked against the pressing side 211 of the adjacent sliding wall 21, that is, Rotate to at least one through hole 101 of the base 1, and then push the limit ball 11 in each through hole 101 on both sides by the pressure side 211 with a smaller inner diameter, and the relative displacement enters the shaft hole 10, then The limiting sphere 11 is stopped by the resisting ring 1011 around the inner edge of the two through-holes 101 arranged oppositely, so that the limiting sphere 11 can be prevented from falling into the shaft hole 10, and can be sleeved by the shaft hole 10 of the base 1 , penetrate the shaft 42 of the shaft seat 4, then the limiting ball 11 in the through hole 101 on both sides of the shaft hole 10 of the base 1 will move along the second guide slope 4212 and pass the stop body 421, and then enter the second A guide inclined surface 4211 is clamped at the concave ring groove 420 of the shaft 42, and the preset first plate 3 positioned on the outside of the adjustment knob 2, that is, the seat body 41 positioned on the shaft seat 4 is embedded in the connecting side 411 One side of the second plate 5 is preset.

If you want to take out and separate the preset second plate 5 from one side of the preset first plate 3, you can turn the adjustment knob 2 again, and at least one of the external marking part 23 of the adjustment knob 2 is locked relative to the internal driving part 22. The convex body 221 rotates from the limiting groove 130 of the limiting part 13 to the stop slot 131 on the other side of the limiting part 13, and at the same time, the at least one locking convex body 221 stacks the adjacent sliding wall surface 21 The pressing side 211 of the pressing side 211 is rotated away from the two opposing through holes 101 of the base 1, while the retreating side 212 of the adjacent pressing side 211 is displaced to the position opposite to the two opposing through holes 101, and then by the relatively The retracting side 212 of the large inner diameter is used for the limit ball 11 to slide from the concave ring groove 420 along the first guide slope 4211 into the through hole 101, and the limit balls 11 on both sides are displaced from the shaft hole 10 by the through hole. 101 into the withdrawn side 212 of the adjustment knob 2, the shaft 42 of the shaft seat 4 can be taken out from the shaft hole 10 of the base 1, and then the seat body 41 side of the shaft seat 4 is embedded in the side 411 When the second board 5 is preset, it is separated from the side where the first board 3 is preset.

The above description is only illustrative of the present invention, rather than restrictive. Those of ordinary skill in the art understand that many modifications, changes or equivalents can be made without departing from the spirit and scope defined in the claims, but All will fall within the protection scope of the present invention.

Claims (9)

1. A board-to-board positioning device, comprising a base and an adjustment knob, characterized in that: The inside of the base has a through shaft hole, and the inner wall of the shaft hole is provided with at least one through hole penetrating to the outside in the direction perpendicular to the shaft hole. The two sides are respectively provided with a connecting part and a limiting part, and at least one limiting groove opposite to the outside of the at least one through hole is provided on the limiting part; and The adjustment knob covers the outside of the base, and the inside is provided with an operation space for the base to pass through, and the connecting part on one side of the base is exposed outside the operation space, and inside the operation space are respectively provided with a pair of The sliding wall surface located at the at least one through hole is opposite to the driving part located at the limiting part, and the sliding wall surface is provided with a pressing side for pushing at least one limiting sphere into and out of the at least one through hole, On the withdrawal side, the driving part is provided with at least one clamping protrusion that rotates and slides along the limiting part and enters and exits the at least one limiting groove. There is a logo part on the outside. 2. The board-to-board positioning device according to claim 1, characterized in that: the base is provided with at least two opposite wall surfaces of the inner shaft hole that penetrate outwards in a direction perpendicular to the shaft hole. through-holes, and the position-limiting spheres are movably installed in the at least two through-holes provided in opposite ways, and the position-limiting part on the outer side of the base is respectively provided with the at least two through-holes arranged in opposite ways. The two relative limit slots of the hole are respectively provided with suspension card slots on the other two opposite sides of the adjacent preset angles of the two relative limit slots. 3 . The board-to-board positioning device as claimed in claim 2 , wherein the preset angle is between 60°-120°, and the preferred preset angle is 90°. 4 . 4. The board-to-board positioning device according to claim 1, characterized in that: the connecting part on one side of the base includes a sleeve ring for the limit washer to be sleeved, and is used for presetting the first board for the first positioning The hole is embedded with a fixed groove for positioning. 5. The board-to-board positioning device according to claim 1, wherein the operating space inside the adjustment knob includes two adjacent stacked sliding walls and the driving part for the connecting part on one side of the base The driving part penetrates through the sliding wall surface to expose the outside of the adjustment knob, and the inside of the operating space is provided with two adjacent stacked sliding wall surfaces and the driving part, and the sliding wall surface is aligned with the driving part The clamping convex body is provided with the pressing side with a smaller inner diameter, adjacent to the pressing side is provided with a withdrawal side with a larger inner diameter, and the inner diameters of the pressing side and the retreating side are smaller than the operating space size of. 6 . The board-to-board positioning device according to claim 1 , characterized in that: the outside of the adjusting knob is provided with a marking part in the form of a protruding rod, a marking part in the form of a cylinder, or a marking part in the shape of a plate. 7 . 7. A board-to-board positioning device, including a base, an adjustment knob, and a shaft seat for the shaft hole of the base to be sleeved and inserted, characterized in that: The inside of the base has a through shaft hole, and the inner wall of the shaft hole is provided with at least one through hole penetrating to the outside in the direction perpendicular to the shaft hole. The two sides are respectively provided with a connecting part and a limiting part, and at least one limiting groove corresponding to the at least one through hole is arranged on the limiting part; The adjustment knob covers the outside of the base, and the inside is provided with an operation space for the base to pass through, and the connecting part on one side of the base is exposed outside the operation space, and inside the operation space are respectively provided with a pair of The sliding wall surface located at the at least one through hole is opposite to the driving part located at the limiting part, and the sliding wall surface is provided with a pressing side and a retreating side for pushing at least one limiting sphere into and out of the at least one through hole. From the side, the driving part is protruded with at least one locking protrusion that rotates and slides along the limiting part and enters and exits the at least one limiting groove, and is outside the adjustment knob relative to the at least one locking protrusion. has a signage department; and The shaft seat includes a seat body located outside the base, and a shaft rod extending outward from one side of the seat body for the shaft hole of the base to be sleeved and passed through. The stop body at the through hole, and the shaft rod between the stop body and the seat body is provided with a concave ring groove for aligning the at least one through hole, and the concave ring groove is used for positioning the at least one through hole At least one of the limiting spheres inside is actively locked or withdrawn. 8. The board-to-board positioning device according to claim 7, characterized in that: the shaft seat includes the seat body whose outer diameter is larger than the outer diameter of the base and smaller than the outer diameter of the adjustment knob. The outer diameter of the shaft rod is smaller than that of the shaft hole, and the shaft rod is provided with a connecting side on the side opposite to the base body for the second positioning hole of the preset second plate to be embedded and fixed. 9. The board-to-board positioning device according to claim 7, characterized in that: the shaft seat has the shaft rod extending outward from one side of the seat body, and the stop body provided on the suspended side of the shaft rod is a One side is provided with a first inclined guide surface extending to the concave ring groove in a conical shape, and the other side of the stopper body is provided with a second inclined guide surface inclined outwards in a conical shape.

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