Board-to-board positioning device

Abstract

The present invention provides a plate-to-plate positioning device, wherein an axial hole passing through the inside of the base has at least one through hole passing through toward the outside in a vertical direction on its inner wall surface, and a limiting ball is installed, and a connecting portion is provided on one side of the outside of the base, and a limiting portion on the other side is provided with at least one limiting groove corresponding to the through hole, and then an internal operating space of an adjusting knob is passed through the outside of the base, and a connecting portion on one side of the base is exposed to the outside of the operating space, and a sliding wall in the operating space faces the through hole, and a driving portion faces the limiting portion, and the sliding wall surface is provided with a pressing side and a retreating side with different wall thicknesses, which can push the limiting ball in and out of the through hole, and the driving portion is convexly provided with at least one clamping convex body that rotates and slides along the limiting portion to enter and exit the limiting groove, and an identification portion is provided on the outside of the adjusting knob relative to the clamping convex body, so as to achieve the purpose of convenient operation of locking or unlocking the positioning device.

Description

Technical Field

[0001] The present invention relates to a plate-to-plate positioning device, in particular to a positioning device which is convenient for identifying whether it is in a locked or unlocked state. An adjusting knob is covered on the outside of a base, and the adjusting knob can be rotated to drive the displacement of a limiting ball inside the base. The identification part provided on the outer edge of the adjusting knob can achieve the purpose of conveniently operating the positioning device to lock or unlock. Background Art

[0002] When general plates (plate to plate) are assembled and joined, they are locked with positioning screws having knobs, collars and screws. The screws and collars are first fixed to the outer panel, the knob is first turned to allow the screws to lock into the inner panel to form a preset position, and then the screws are tightened with a hand tool to lock the outer panel and the inner panel into one. This locking mode of multi-layer plates can be used for machine tools or other plate-to-plate connections; however, the parts of these machine tools that require the use of plates for locking are mostly power devices or speed adjustment devices, and various power devices and speed adjustment devices are located inside the space formed by the machine housing, that is, the plates can be assembled, locked and disassembled in a movable manner. When the power device crashes, fails or is damaged, or the speed adjustment device changes or adjusts its speed, the plates are removed for operation. Related maintenance and adjustment operations, and the plate is locked by multiple positioning screws, so the positioning screws are easily caused to fall off or lost during the disassembly process, and the plate cannot be locked back to its original position again, affecting the inconvenience and trouble of assembly and disassembly operations. In order to solve the disadvantage that the locking screws are easily lost, some industry insiders have developed a fixing device composed of a sleeve cap, a screw portion and a positioning seat. The positioning seat of the fixing device is first buckled and fixed in the through-hole of the plate, and then the screw portion is used to lock it on another plate to form a fixation. When the user removes the plate, the fixing device can still be fixed in the through-hole of the plate through the positioning seat, and the fixing device will not fall off or be lost. However, in the assembly process, the user must still apply force or use hand tools (such as screwdrivers or wrenches, etc.) to control the locking or disassembly of the fixing device. There are still many deficiencies and troubles in actual application.

[0003] However, in the current era of modular mass production and processing efficiency, the cumbersome manual assembly process using screws to connect two opposing plates will seriously affect the manufacturer's shipment progress. In addition, due to their small size, screws are easily lost in the process of locking the two plates. Differences in the screw hole sizes at the screw locking positions or inconsistencies in the number of screw hole teeth and pitches will cause difficulties in assembly, alignment or locking. In addition, the space available for operating the screws between the two opposing plates is quite narrow, which means that the screws are easily obstructed by surrounding objects during assembly and disassembly. This not only consumes a lot of time and causes inconvenience, but will also lead to an increase in overall costs, resulting in an increased burden on the industry.

[0004] In summary, how to solve the problem and trouble that the fixing devices currently used for locking plates are easily loosened or detached due to accidental rotation, and the trouble and inconvenience of applying force or using hand tools during assembly of the fixing devices are the directions that the relevant manufacturers engaged in this industry are eager to study and improve. Summary of the invention

[0005] In view of the above problems and deficiencies, the main purpose of the present invention is to provide a board-to-board positioning device.

[0006] To achieve the above object, the technical solution adopted by the present invention is:

[0007] A plate-to-plate positioning device comprises a base and an adjustment knob, and is characterized in that:

[0008] The base has a through axial hole inside, and at least one through hole is provided on the inner wall of the axial hole and is through to the outside in a direction perpendicular to the axial hole, a limiting ball is installed inside the at least one through hole, and a connecting part and a limiting part are respectively provided on two sides of the outside of the base, and at least one limiting groove is provided on the limiting part and is located outside the at least one through hole; and

[0009] The adjusting knob cover is covered on the outside of the base, and an operating space for the base to pass through is provided inside, and the connecting part on one side of the base is exposed outside the operating space, and a sliding wall surface located at the at least one through hole and a driving part located at the limiting part are respectively provided inside the operating space, and the sliding wall surface is provided with a pressing side and a retreating side for pushing at least one limiting ball to move in and out of the at least one through hole, and the driving part is convexly provided with at least one clamping protrusion that rotates and slides along the limiting part to enter and exit the at least one limiting groove, and an identification part is provided on the outside of the adjusting knob relative to the at least one clamping protrusion.

[0010] The plate-to-plate positioning device, wherein: the base is provided with at least two opposite wall surfaces of the internal axial hole, and the at least two oppositely arranged through holes are penetrated outward in a direction perpendicular to the axial hole, and the limiting balls are movably installed in the at least two oppositely arranged through holes, and the limiting portion on one side of the outer side of the base is provided with two opposite limiting grooves respectively corresponding to the at least two oppositely arranged through holes, and pause slots are respectively provided on the other two opposite sides of the two opposite limiting grooves at adjacent preset angles.

[0011] The board-to-board positioning device, wherein: the preset angle is between 60° and 120°, and the preferred preset angle is 90°.

[0012] The plate-to-plate positioning device, wherein: the connecting portion on one side of the base includes a sleeve ring for a limiting washer to be sleeved, and an embedding groove for a preset first plate to be embedded and positioned with a first positioning hole.

[0013] The plate-to-plate positioning device, wherein: the operating space inside the adjusting knob includes the sliding wall and the driving part of two adjacent stacks, so that the connecting part on one side of the base is penetrated by the driving part through the sliding wall and exposed to the outside of the adjusting knob, and the sliding wall and the driving part of two adjacent stacks are provided inside the operating space, and the sliding wall is provided with a pressing side with a smaller inner diameter at the clamping protrusion corresponding to the driving part, and a retreat side with a larger inner diameter is provided adjacent to the pressing side, and the inner diameters of the pressing side and the retreat side are both smaller than the size of the operating space.

[0014] The plate-to-plate positioning device, wherein: the outside of the adjustment knob is provided with a marking portion in the form of a convex rod, a marking portion in the form of a cylinder or a marking portion in the form of a plate.

[0015] A plate-to-plate positioning device comprises a base, an adjustment knob and an axle seat for sleeve or penetration of an axle hole of the base, characterized in that:

[0016] The base has a through shaft hole inside, and at least one through hole is provided on the inner wall of the shaft hole and is perpendicular to the shaft hole. A limiting ball is installed inside the at least one through hole. A connecting part and a limiting part are provided on two sides of the outside of the base, and at least one limiting groove is provided on the limiting part and is located at the at least one through hole.

[0017] The adjusting knob covers the outside of the base, and is provided with an operating space for the base to pass through, and the connecting portion on one side of the base is exposed outside the operating space, and a sliding wall surface located at the at least one through hole and a driving portion located at the limiting portion are respectively provided inside the operating space, and the sliding wall surface is provided with a pressing side and a retreating side for pushing at least one limiting ball into and out of the at least one through hole, and the driving portion is convexly provided with at least one clamping convex body that rotates and slides along the limiting portion to enter and exit the at least one limiting groove, and an identification portion is provided on the outside of the adjusting knob relative to the at least one clamping convex body; and

[0018] The shaft seat includes a seat body located outside the base, an shaft rod extending outward from one side of the seat body and being sleeved and passed through the shaft hole of the base, a stop body passing through the at least one through hole is provided on the suspended side of the shaft rod, and a concave annular groove for aligning the at least one through hole is provided on the shaft rod between the stop body and the seat body, and the concave annular groove is used for movably locking or withdrawing at least one of the limiting balls located in the at least one through hole.

[0019] The plate-to-plate positioning device, wherein: the shaft seat includes the seat body with an outer diameter larger than the outer diameter of the base and smaller than the outer diameter of the adjustment knob, the shaft rod extending outward from one side of the seat body and having an outer diameter smaller than the shaft hole, and the shaft rod is provided with a connecting side on the side opposite to the seat body for embedding and fixing a second positioning hole preset for a second plate.

[0020] The plate-to-plate positioning device, wherein: the shaft seat has the shaft rod extending outward on one side of the seat body, the stop body provided on the suspended side of the shaft rod is provided with a first guide bevel surface extending in a conical shape to the concave annular groove on one side, and the stop body is provided with a second guide bevel surface inclined outward in a conical shape on the other side.

[0021] The advantage of the present invention is that it provides a board-to-board positioning device, with an adjustment knob covered on the outside of the base, which can be used to drive the displacement of the limiting ball inside the base by rotating the adjustment knob, and the identification part provided on the outer edge of the adjustment knob can conveniently operate the positioning device to lock or unlock. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional appearance diagram of the present invention.

[0023] Figure 2 It is a three-dimensional exploded view of the present invention.

[0024] Figure 3 This is a three-dimensional exploded view from another perspective of the present invention.

[0025] Figure 4 It is a side cross-sectional view of the present invention.

[0026] Figure 5 It is a top view of the shaft seat and the adjusting knob of the present invention before being rotated.

[0027] Figure 6 It is a top view of the shaft seat and the adjusting knob of the present invention after being rotated.

[0028] Figure 7 It is a side cross-sectional view of a preferred embodiment of the present invention.

[0029] Explanation of the accompanying drawings: 1-base; 10-axial hole; 101-through hole; 1011-resisting ring edge; 11-limiting ball; 12-connecting part; 121-sleeve ring; 1210-ring hole; 1211-limiting gasket; 122-embedded groove; 13-limiting part; 130-limiting groove; 131-pause slot; 2-adjusting knob; 20-operating space; 21-sliding wall; 211-pressing side; 212-retracting side; 22-driving part; 221-clamping convex body; 23-marking part; 3-first plate; 30-first positioning hole; 4-axial seat; 41-seat body; 411-connecting side; 42-axial rod; 420-concave ring groove; 421-stop body; 4211-first guide slope; 4212-second guide slope; 5-second plate; 50-second positioning hole. DETAILED DESCRIPTION

[0030] In order to achieve the above-mentioned purpose and effect, the technical means and structures, implementation methods, etc. adopted by the present invention are described in detail with reference to the accompanying drawings for the preferred embodiments of the present invention and their features and functions are as follows:

[0031] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown in the figure, it is a three-dimensional appearance diagram, a three-dimensional exploded diagram, a three-dimensional exploded diagram from another perspective, and a side cross-sectional diagram of the present invention. It can be clearly seen from the figure that the plate-to-plate positioning device of the present invention includes a base 1 and an adjustment knob 2, wherein:

[0032] The base 1 has a through axial hole 10 inside, and at least one through hole 101 is provided on the inner wall of the axial hole 10 and is penetrated to the outside in a direction perpendicular to the axial hole 10. The periphery of the hole edge of at least one through hole 101 adjacent to the axial hole 10 is provided with a resisting ring edge 1011 which reduces the hole diameter inwardly, and a limiting ball 11 is installed inside the at least one through hole 101, and at least one limiting ball 11 is stopped and limited by the resisting ring edge 1011 located around the hole edge inside the at least one through hole 101, which can effectively prevent at least one limiting ball 11 from falling into the axial hole 10, and a connecting portion 12 and a limiting portion 13 are respectively provided on the two sides of the outside of the base 1, and at least one limiting groove 130 is provided on the limiting portion 13 for positioning outside the at least one through hole 101.

[0033] The adjusting 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 a connecting portion 12 on one side of the base 1 is exposed outside the operating space 20, and adjacently stacked sliding walls 21 and driving portions 22 are provided inside the operating space 20, and the sliding wall 21 is located opposite to at least one through hole 101, and the driving portion 22 is located opposite to the limiting portion 13, and adjacent and parallel pressing sides 211 and retreating sides 212 with different inner diameters are provided on the sliding wall 21, so that the pressing sides 211 and the retreating sides 212 can be used to push at least one limiting ball 11 into and out of at least one through hole 101, and the driving portion 22 is convexly provided with at least one clamping protrusion 221, so that at least one clamping protrusion 221 can be rotated and slid 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 adjusting knob 2 relative to the at least one clamping protrusion 221.

[0034] The above-mentioned base 1 can be provided with at least two symmetrical through holes 101 extending outward in a direction perpendicular to the axis hole 10 on at least two opposite wall surfaces of the internal axis hole 10, and a limiting ball 11 is movably installed in each through hole 101, and a limiting portion 13 on one side of the outer side of the base 1 is provided with two relative limiting grooves 130 corresponding to at least two symmetrical through holes 101, and a pause slot 131 is provided on the other two opposite sides of the adjacent preset angles of the two relative limiting grooves 130, then the preset angle can be between 60° and 120°, and the preferred preset angle can be 90°, and the connecting portion 12 on one side of the base 1 includes a sleeve ring 121 for a limiting washer 1211 to be mounted, and an embedding groove 122 for a preset first plate 3 to be embedded and positioned with a first positioning hole 30.

[0035] In addition, the internal operating space 20 of the adjustment knob 2 includes two adjacently stacked sliding walls 21 and a driving portion 22, so that the connecting portion 12 on one side of the base 1 is inserted through the sliding wall 21 by the driving portion 22 to expose the outside of the adjustment knob 2, and the sliding wall 21 is provided with a pressing side 211 with a smaller inner diameter (R1) facing the clamping protrusion 221 of the driving portion 22, and the adjacent pressing side 211 is provided with a retreat side 212 with a larger inner diameter (R2), and the outside of the adjustment knob 2 is provided with an identification portion 23 in the shape of a convex rod, a cylinder or a plate, and the inner diameters of the pressing side 211 and the retreat side 212 are both smaller than the size of the operating space 20.

[0036] Furthermore, please see Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7As shown, it is a three-dimensional exploded view of the present invention, a three-dimensional exploded view from another perspective, a side cross-sectional view, a top view of the shaft seat and the adjustment knob before rotation, a top view of the shaft seat and the adjustment knob after rotation, and a side cross-sectional view of a preferred embodiment. The plate-to-plate positioning device of the present invention further includes a base 1, an adjustment knob 2 and a shaft seat 4, wherein:

[0037] The base 1 has a through axial hole 10 inside, and two relatively arranged through holes 101 are arranged on the inner wall surface of the axial hole 10 and pass through the outside in a direction perpendicular to the axial hole 10. The two relatively arranged through holes 101 are respectively equipped with limiting balls 11, and connecting parts 12 and limiting parts 13 are respectively arranged on the two sides of the outside of the base 1, and two relatively arranged limiting grooves 130 are arranged on the limiting part 13 and are located outside the two relatively arranged through holes 101.

[0038] The adjusting 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 a connecting portion 12 on one side of the base 1 is exposed outside the operating space 20, so that the ring hole 1210 of the limiting washer 1211 is sleeved and fixed on the sleeve ring 121 of the connecting portion 12, and then the first positioning hole 30 of the preset first plate 3 is provided at the embedding groove 122 of the connecting portion 12 for assembly and positioning, and the limiting washer 1211 is used to stop at the bottom of the adjusting knob 2 to prevent the adjusting knob 2 from separating from the base 1, so that the base 1 can be set in the operating space 20 of the adjusting knob 2, and adjacently stacked sliding walls 21 and driving portions 22 are respectively provided inside the operating space 20, and the sliding wall 21 is opposite to at least one through hole 101 and the driving portion 22. The limiting portion 13 and the sliding wall 21 are provided with adjacent and parallel pressing sides 211 and retreating sides 212, so that the pressing sides 211 and retreating sides 212 can be used to respectively push the two limiting balls 11 to slide in the two relatively arranged through holes 101, so that part of the volume of the two limiting balls 11 can enter the shaft hole 10 respectively, and be stopped by the resisting ring edges 1011 around the inner hole edges of the two relatively arranged through holes 101, so as to prevent the limiting balls 11 from falling into the shaft hole 10. The driving portion 22 is provided with at least one clamping protrusion 221, so that the at least one clamping protrusion 221 can be rotated and slid 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 adjusting knob 2 relative to the at least one clamping protrusion 221.

[0039] The shaft seat 4 includes a seat body 41 located outside the base 1, and an axle rod 42 extending outward from one side of the seat body 41 and penetrating into the axle hole 10 of the base 1. A stopper body 421 is provided on the suspended side of the axle rod 42 so as to pass through at least one through hole 101, and a concave annular groove 420 is provided on the axle rod 42 between the stopper body 421 and the seat body 41. The concave annular groove 420 is used to align at least one through hole 101, and a limiting ball 11 located in the through hole 101 can be movably clamped or withdrawn from the concave annular groove 420.

[0040] The outer diameter of the seat body 41 of the above-mentioned shaft seat 4 is larger than the outer diameter of the base 1 and smaller than the outer diameter of the adjusting knob 2. The outer diameter of the shaft rod 42 extending outward from one side of the seat body 41 is smaller than the shaft hole, and a connecting side 411 is provided on the other side of the seat body 41 relative to the shaft rod 42, so that the second positioning hole 50 of the preset second plate 5 can be embedded and fixed in position. The shaft rod 42 extending outward from one side of the seat body 41 of the shaft seat 4 has a stopper 421 provided on its suspended side with a first guide bevel 4211 inclined in a conical shape extending to the concave annular groove 420, and a second guide bevel 4212 inclined outward in a conical shape is provided on the other side of the stopper 421 relative to the first guide bevel 4211.

[0041] The above-mentioned shaft seat 4 can use the shaft rod 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 one side of the shaft rod 42 enters the shaft hole 10, the second guide inclined surface 4212 on one side of the stop body 421 can push each limiting ball 11 into each through hole 101 respectively, so that the shaft rod 42 and the stop body 421 can smoothly penetrate into the shaft hole 10.

[0042] When the plate-to-plate positioning device of the present invention is actually applied and implemented, the adjustment knob 2 can be rotated, and the external identification portion 23 of the adjustment knob 2 is relative to at least one clamping protrusion 221 of the internal driving portion 22, so that at least one clamping protrusion 221 can be rotated to the limiting groove 130 of the limiting portion 13 located on the base 1, and at the same time, the at least one clamping protrusion 221 stacks the pressing side 211 of the adjacent sliding wall 21, that is, rotates to at least one through hole 101 located on the base 1, and then the pressing side 211 with a smaller inner diameter pushes the limiting spheres 11 in the through holes 101 on both sides, and the relative displacement enters the shaft hole 10, then the limiting spheres 11 in the through holes 101 on both sides are pushed. The positioning ball 11 is stopped by the stop ring edge 1011 around the inner hole edge of the two relatively arranged through holes 101, which can prevent the limiting ball 11 from falling into the axial hole 10, so that it can be sleeved through the axial hole 10 of the base 1 and penetrate into the shaft rod 42 of the shaft seat 4. Then, the limiting ball 11 in the through holes 101 on both sides of the axial hole 10 of the base 1 will move along the second guide bevel 4212 to pass over the stop body 421, enter the first guide bevel 4211 and be clamped in the concave annular groove 420 of the shaft rod 42, and the preset first plate 3 positioned on the outside of the adjustment knob 2, that is, the side of the preset second plate 5 embedded in the seat body 41 of the shaft seat 4 at the connecting side 411.

[0043] If the preset second plate 5 is to be taken out and separated from one side of the preset first plate 3, the adjustment knob 2 can be rotated again, and the at least one clamping protrusion 221 of the external identification portion 23 of the adjustment knob 2 is relative to the internal driving portion 22, and rotated from the limiting groove 130 of the limiting portion 13 to the pause clamping groove 131 on the other side of the limiting portion 13, and at the same time, the at least one clamping protrusion 221 stacks the pressing side 211 of the adjacent sliding wall 21, that is, rotates away from the two relative through holes 101 of the base 1, and the withdrawal of the adjacent pressing side 211 The side 212 is displaced to the two opposite through holes 101, and then the larger inner diameter withdrawal side 212 allows the limiting ball 11 to slide from the concave ring groove 420 along the first guide inclined surface 4211 into the through hole 101, and the limiting balls 11 on both sides are pushed to move from the shaft hole 10 and enter the withdrawal side 212 of the adjusting knob 2 from the through hole 101, so that the shaft rod 42 of the shaft seat 4 can be taken out from the shaft hole 10 of the base 1, and the preset second plate 5 embedded at the connection side 411 of the seat body 41 of the shaft seat 4 is separated from the preset first plate 3 side.

[0044] The above description is only illustrative rather than restrictive of the present invention. Those skilled in the art will understand that many modifications, changes or equivalents may be made without departing from the spirit and scope defined by the claims, but all will fall within the scope of protection of the present invention.

Claims

1. A plate-to-plate positioning device, used for positioning on a preset first plate and then assembling a preset second plate, comprising a base, an adjustment knob and an axle seat for the axle hole of the base to be sleeved or penetrated, characterized in that: The base has a through shaft hole inside, and at least one through hole is provided on the inner wall of the shaft hole and is through the outside in a direction perpendicular to the shaft hole. A limiting ball is installed inside the at least one through hole, and a connecting part and a limiting part are respectively provided on two sides outside the base. The connecting part includes a sleeve ring for a limiting washer to be sleeved, and an embedding groove for a preset first plate to be embedded and positioned with a first positioning hole, and at least one limiting groove corresponding to the at least one through hole is provided on the limiting part; The adjusting knob cover is covered on the outside of the base, and an operating space for the base to pass through is provided inside, and the connecting portion on one side of the base is exposed outside the operating space, and a sliding wall surface located at the at least one through hole and a driving portion located at the limiting portion are respectively provided inside the operating space, and the sliding wall surface is provided with a pressing side and a retreating side for pushing at least one limiting ball into and out of the at least one through hole, and the driving portion is convexly provided with at least one clamping convex body that rotates and slides along the limiting portion to enter and exit the at least one limiting groove, and relative to the at least one clamping convex body The outside of the adjustment knob is provided with an identification portion; the operation space includes two adjacently stacked sliding walls and the driving portion, so that the connecting portion on one side of the base is penetrated by the driving portion through the sliding wall to expose the outside of the adjustment knob, and the inside of the operation space is provided with two adjacently stacked sliding walls and the driving portion, and the sliding wall is provided with the pressing side at the clamping convex body corresponding to the driving portion, and the retreat side is provided adjacent to the pressing side, the inner diameter of the retreat side is larger than the inner diameter of the pressing side, and the inner diameters of the pressing side and the retreat side are both smaller than the size of the operation space; 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 outer diameter of the seat body 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 the shaft hole. A stop body passing through the at least one through hole is provided on the suspended side of the shaft rod, and a concave annular groove for aligning the at least one through hole is provided on the shaft rod between the stop body and the seat body. The concave annular groove is used for at least one of the limiting balls located in the at least one through hole to be movably clamped or withdrawn. The shaft rod is provided with a connecting side on the side opposite to the seat body for a second positioning hole preset for a second plate to be embedded and fixed.

2. The board-to-board positioning device according to claim 1, characterized in that: The base is provided with at least two relatively arranged through holes on at least two relatively arranged wall surfaces of the internal axial hole, which penetrate outward in a direction perpendicular to the axial hole, and the limiting balls are movably installed in the at least two relatively arranged through holes, and the limiting part on one side of the outer side of the base is provided with two relatively limiting grooves respectively corresponding to the at least two relatively arranged through holes, and pause slots are respectively provided on the other two relatively sides of the two relatively limiting grooves at adjacent preset angles.

3. The board-to-board positioning device according to claim 2, characterized in that: The preset angle is between 60° and 120°.

4. The board-to-board positioning device according to claim 3, characterized in that: The preset angle is 90°.

5. The board-to-board positioning device according to claim 1, characterized in that: The adjusting knob is provided with a marking portion in the form of a convex rod, a cylindrical marking portion or a plate-shaped marking portion on the outside.

6. The board-to-board positioning device according to claim 5, characterized in that: The shaft seat has the shaft rod extending outwardly on one side of the seat body, and the stop body arranged on the suspended side of the shaft rod has a first guide bevel surface extending in a conical shape to the concave annular groove on one side, and a second guide bevel surface inclined outwardly in a conical shape on the other side of the stop body.

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