Printed circuit board processing and positioning jig

Abstract

The utility model relates to a printed circuit board processing and positioning jig which comprises a base, a mounting plate is arranged at the top of the base, the center of the top surface of the mounting plate is sunken, a plurality of sliding grooves are formed in the bottom surface of the mounting plate, the sliding grooves are arranged in a circumferential array around the center of the mounting plate, and a sliding block is arranged in each sliding groove. Clamping plates are fixedly installed on the sliding blocks arranged on the same side, the multiple clamping plates are spliced into a rectangular frame, a circuit board is embedded in the center of the rectangular frame, an adjusting shaft is arranged in the base and assembled with the bottoms of the sliding blocks in a threaded mode, an adjusting handle is further arranged on the outer side wall of the base, and the adjusting handle is in transmission connection with the end of the adjusting shaft on the same side; the clamping jig is improved based on an existing clamping jig, an original elastic clamping structure is changed into a thread driving structure, compared with an existing structure, the clamping force of the clamping jig can be actively controlled, the manually-adjusted clamping force is relatively smooth and stable, the situation that the clamping force is too large or too loose is avoided, and the clamping jig is simple in structure and convenient to operate.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit board jigs, in particular to a printed circuit board processing positioning jig. Background Art

[0002] Jigs are a large category of tools for carpentry, ironwork, fitter, machinery, electronic control and some other handicrafts. They are mainly used as a tool to assist in controlling position or movement. Jigs can be divided into three categories: process assembly jigs, project test jigs and circuit board test jigs. In the silk screen manufacturing process of general circuit boards, jigs are needed to support the board during printing to complete the silk screen printing ink of the circuit board and achieve the purpose of improving production efficiency.

[0003] The bearing structure of a general circuit board jig is fixed, but in the actual production process, the types and sizes of circuit boards are different, so it is necessary to frequently replace the clamping parts. In order to solve this problem, a Chinese patent with announcement number CN210840247U proposes a screen printing bearing jig suitable for a variety of circuit boards. The jig structure adopts a spring to cooperate with the clamping part for adjustment, so it can be suitable for clamping circuit boards of various specifications, effectively solving the problem of frequent replacement of clamping parts.

[0004] However, in the above structure, the elastic force is uncontrollable, that is, when the circuit board is too large, the spring shrinks to a shorter size, causing excessive clamping force on its side, which may cause damage to the side wall of the circuit board; and when the circuit board is small, the spring is in a relaxed state, with low clamping force, resulting in poor stability during processing, and therefore poor use effect. Utility Model Content

[0005] Based on the above description, the utility model provides a printed circuit board processing positioning fixture to solve the shortcomings of the existing fixture that the clamping and fixing part adopts spring adjustment, cannot ensure the stability of its clamping force, easily damages the circuit board, or causes its processing process to be unstable.

[0006] The utility model is realized through the following technical solutions:

[0007] A printed circuit board processing positioning fixture comprises a base, a mounting plate is provided on the top of the base, the center of the top surface of the mounting plate is recessed and a plurality of slide grooves are provided on the bottom surface, the plurality of slide grooves are arranged in a circular array with the center of the mounting plate, a slider is provided in each of the slide grooves, a card plate is fixedly installed on the sliders arranged on the same side, and a plurality of the card plates are spliced ​​into a rectangular frame and a circuit board is embedded in the center, an adjusting shaft is provided inside the base, the adjusting shaft is threadedly assembled with the bottom of the slider, and an adjusting handle is also provided on the outer side wall of the base, the adjusting handle is drivingly connected to the end of the adjusting shaft on the same side.

[0008] On the basis of the above technical solution, the present invention can also be improved as follows.

[0009] Furthermore, a card slot is provided on the inner side wall of the slide slot, two sides of the slider protrude outward and are slidably inserted into the card slot, and the top surface of the slider is flush with the bottom surface of the recessed part of the top surface of the mounting plate.

[0010] Furthermore, a socket is provided on the top of the slider, the card plate is in the shape of a rectangular plate, and a plurality of locking holes of the same size as the socket are provided on the top surface of the card plate, the card plate is vertically arranged so that the locking holes and the card holes are aligned up and down, and the card holes and the locking holes are both arranged as hexagonal holes and fixed and assembled by pins.

[0011] Furthermore, the interior of the base is hollow, the slide groove extends downward and is connected to the interior of the base, and there are four adjustment shafts, which are divided into two groups and arranged at intervals, wherein the upper group of adjustment shafts is arranged horizontally inside the base, and the lower group of adjustment shafts is arranged longitudinally inside the base, and each group of adjustment shafts is arranged at both ends of the interior of the base.

[0012] Furthermore, two partitions are correspondingly provided inside the base, one end of the adjusting shaft end is rotatably connected to the partition, and the other end of the adjusting shaft end is rotatably connected to the inner wall of the base.

[0013] Furthermore, a transmission gear is sleeved on one end of the adjustment shaft extending to the surface of the partition, the adjustment handle is rotatably inserted into the side wall of the base and its end extends to the side wall of the partition, and a driving gear is also provided on one end of the adjustment handle located inside the base, and the driving gear is connected to the transmission gear through a chain to form a triangular structure.

[0014] Furthermore, a thin elastic pad layer is provided on one side of the clamping plate facing the center of the base.

[0015] Furthermore, the adjusting shaft is configured as a screw rod and the threaded structure is arranged in opposite directions from the center to both ends.

[0016] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0017] 1. The present application is based on the improvement of the existing clamping jig, and the original elastic clamping structure is changed into a threaded drive structure. Compared with the existing structure, the clamping force can be actively controlled, and the manually adjusted clamping force is relatively smooth and stable, and there will be no situation where the clamping force is too large or too loose. In addition, the structure is simple and easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1Schematic diagram of the structure of the base and the partition in this embodiment;

[0019] Figure 2 Schematic diagram of the internal structure of the base in this embodiment;

[0020] Figure 3 Schematic diagram of the structure of the adjustment shaft in this embodiment;

[0021] Among them: 1. base; 11. partition; 2. mounting plate; 3. slide groove; 31. card slot; 32. slider; 33. card plate; 4. adjustment shaft; 41. transmission gear; 42. adjustment handle; 43. drive gear. DETAILED DESCRIPTION

[0022] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0024] Combination Figure 1-3 As shown, a printed circuit board processing positioning fixture includes:

[0025] The base 1 is a rectangular structure and is arranged at the bottom to fix and support other components;

[0026] The mounting plate 2 is arranged on the top surface of the base 1, and a groove is formed at the center of the top surface to fix the circuit board so as to facilitate subsequent processing;

[0027] The slide grooves 3 are arranged in a plurality of rows and arranged in a circular array with the center of the top surface of the base 1, and a slider 32 is provided inside the slide grooves 3. A clamping plate 33 is fixedly installed on the top of the slider 32 on the same side, and the clamping plate 33 is used to clamp and fix the side wall of the circuit board;

[0028] The adjusting shaft 4 is provided with multiple shafts and is arranged inside the base 1, and the side wall thereof is assembled with the slider 32 through a threaded structure, so that the adjustment of the slider 32 is achieved by controlling the rotation direction thereof;

[0029] The adjusting handle 42 is disposed on the side wall of the base 1 and is in driving connection with the adjusting shaft 4 so that the staff can control the rotation direction of the adjusting shaft 4 .

[0030] Specifically, in order to ensure that the slider 32 can move smoothly inside the slide groove 3, an additional slot 31 structure should be opened on the inner wall of the slide groove 3, and the two ends of the slide groove 3 are extended outward and slidably inserted into the slot 31 at the same time.

[0031] Since a slider 32 is arranged in each slide groove 3, the slide grooves 3 are arranged relative to each other, so that the sliders 32 are arranged on the same straight line. Therefore, the clamping plate 33 fixedly installed on the slider 32 on the same side moves relative to or back to back when clamping or releasing.

[0032] Based on the above-mentioned movement method, and synchronously combined with the threaded assembly structure of the adjusting shaft 4, in this embodiment, the adjusting shaft 4 should be a double-threaded screw, that is, a threaded structure arranged in opposite directions is formed at the center of its surface and extends toward both ends, so that the sliders 32 located on the same straight line can achieve relative or reverse movement via the same adjusting shaft 4.

[0033] In addition, in order to ensure the clamping stability of the clamping block, at least two slide grooves 3 should be set on the same side, and the two slide grooves 3 should be symmetrically arranged on both sides of the mounting plate 2, and the clamping plate 33 has its two ends fixedly connected to the top of the sliders 32 on the two slide grooves 3. In order to drive the two pairs of sliders 32 to move relative to or back to back at the same time, it is necessary to drive the two adjustment shafts 4 inside the base 1 to rotate simultaneously.

[0034] At the same time, considering that the clamping is in four directions during the actual clamping operation, four adjusting shafts 4 are arranged in this embodiment (in the actual operation, the number of slide slots 3 and the number of adjusting shafts 4 on the same side can be additionally provided according to the size of the circuit board to be processed to ensure the stability of the side wall clamping), and each two are grouped together and arranged at intervals up and down, with the upper group being arranged horizontally and the lower group being arranged vertically, for example Figure 2 and Figure 3 As shown, the adjusting shafts 4 of the same group are arranged at both ends of the same side wall.

[0035] In the above structure, in order to synchronously drive the two adjustment shafts 4 on the same side, two partitions 11 should be provided inside the base 1. The two partitions 11 are adjacent and spaced apart and parallel to the inner wall of the base 1. One end of the adjustment shaft 4 of the same group extends to the surface of the partition 11 and is rotatably connected, and the other end extends to the side wall of the base 1 and is rotatably connected. A transmission gear 43 is sleeved on the end of one end on the partition 11 that extends to the outward end thereof, and the adjustment handle 42 passes through the side wall of the base 1 inwardly outside the base 1 and extends to the surface of the partition 11 and is rotatably connected. The adjustment handle 42 is arranged just above or below the middle of the ends of the two adjustment shafts 4, and a driving gear is provided on the outer wall of the adjustment handle 42. The driving gear and the two transmission gears 43 form a triangular structure and are connected by a chain. (This structure can be driven by a belt transmission structure. If the number of adjustment shafts 4 is too large, each adjacent two adjustment shafts 4 can also be connected by a chain in sequence, so that only one of them needs to be driven to drive all the adjustment shafts 4 to rotate, for example Figure 2 (shown)

[0036] In actual use, there are some circuit board structures that are too small. When they need to be fixed, if they rely on the clamping effect of the four sides, they are easily affected by the length of the card plate 33. Therefore, in this embodiment, the connection method adopted between the slider 32 and the card plate 33 is a detachable fixed connection, that is, a socket is vertically opened at the top of the slider 32, and a locking hole is vertically penetrated on the card plate 33. The socket and the locking hole are both set as hexagonal holes and are locked and fixed by a pin. Therefore, in this structure, the card plate 33 can be disassembled. When fixing some smaller circuit boards, the card plate 33 can be replaced by a rivet pressing part, so that it can press down and fix the four corners of the circuit board. The specific structure can refer to the edge pressing mold in the existing CNC processing equipment, as long as the corners can be fixed.

[0037] Furthermore, in order to prevent the clamping force from being too large during the clamping process, an elastic thin layer should be provided on the inner side of the clamping plate 33, and the elastic thin layer can be a rubber layer.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solution recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solution from the technical solution of the embodiments of the utility model.

Claims

1. A printed circuit board processing positioning fixture, characterized in that: The invention comprises a base (1), wherein a mounting plate (2) is provided on the top of the base (1), the center of the top surface of the mounting plate (2) is recessed and a plurality of slide grooves (3) are provided on the bottom surface, the plurality of slide grooves (3) are arranged in a circular array with the center of the mounting plate (2), a slider (32) is provided in each of the slide grooves (3), a card plate (33) is fixedly installed on the sliders (32) arranged on the same side, and a plurality of card plates (33) are spliced ​​into a rectangular frame and a circuit board is embedded in the center, an adjusting shaft (4) is provided inside the base (1), the adjusting shaft (4) is threadedly assembled with the bottom of the slider (32), and an adjusting handle (42) is also provided on the outer wall of the base (1), and the adjusting handle (42) is drivingly connected to the end of the adjusting shaft (4) on the same side.

2. A printed circuit board processing positioning fixture according to claim 1, characterized in that: A clamping groove (31) is provided on the inner side wall of the slide groove (3), two sides of the slider (32) protrude outward and are slidably inserted into the inside of the clamping groove (31), and the top surface of the slider (32) is flush with the bottom surface of the recessed portion of the top surface of the mounting plate (2).

3. A printed circuit board processing positioning fixture according to claim 2, characterized in that: The top of the slider (32) is also provided with an insertion hole, the card plate (33) is in the shape of a rectangular plate, and the top surface of the card plate (33) is provided with a plurality of locking holes of the same size as the insertion hole, the card plate (33) is vertically arranged so that the locking holes and the insertion holes are aligned up and down, and the insertion holes and the locking holes are both arranged as hexagonal holes and are fixed and assembled by means of a latch.

4. A printed circuit board processing positioning jig according to claim 1, characterized in that: The interior of the base (1) is hollow, the slide groove (3) extends downward and is connected to the interior of the base (1), and four adjusting shafts (4) are provided and are divided into two groups and arranged at intervals, wherein the upper group of adjusting shafts (4) is arranged horizontally inside the base (1), and the lower group of adjusting shafts (4) is arranged longitudinally inside the base (1), and each group of adjusting shafts (4) is arranged at two ends inside the base (1).

5. A printed circuit board processing positioning jig according to claim 4, characterized in that: Two partitions (11) are correspondingly arranged inside the base (1); one end of the end of the adjustment shaft (4) is rotatably connected to the partition (11), and the other end of the end of the adjustment shaft (4) is rotatably connected to the inner wall of the base (1).

6. A printed circuit board processing positioning jig according to claim 5, characterized in that: A transmission gear (41) is sleeved on one end of the adjustment shaft (4) extending to the surface of the partition (11); the adjustment handle (42) is rotatably inserted into the side wall of the base (1) and has its end extended to the side wall of the partition (11); and a driving gear (43) is also provided on one end of the adjustment handle (42) located inside the base (1); the driving gear (43) is connected to the transmission gear (41) through a chain to form a triangular structure.

7. A printed circuit board processing positioning jig according to claim 1, characterized in that: A thin elastic pad layer is also provided on one side of the clamping plate (33) facing the center of the base (1).

8. The printed circuit board processing positioning fixture according to claim 1, characterized in that: The adjusting shaft (4) is configured as a screw rod, and the thread structure is arranged in opposite directions from the center to both ends.

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