Plug hole inspection device for single-sided printed circuit board

Abstract

The utility model discloses a single-sided printed circuit board plug hole inspection device, which comprises a rack, a backlight lamp panel and a detection probe, the backlight lamp panel is mounted at the inner bottom of the rack, the detection probe is erected on the rack, a double-thread screw is rotatably mounted in the rack, a pair of screw seats are symmetrically screwed on two threaded sections of the double-thread screw, and the double-thread screw is provided with a plurality of screw holes. A clamping frame is installed below each screw seat, a plurality of rollers are rotationally installed on the opposite sides of the clamping frames respectively, the bottom ends of the rollers are coaxially connected with first synchronous wheels, the first synchronous wheels of the rollers are sleeved with first synchronous belts, and a first motor for driving one roller to rotate is further installed below the clamping frames. According to the utility model, when the double-thread screw rotates, the two screw seats are synchronously driven to move in opposite directions, so that the two clamping frames are close to each other or far away from each other, the consistency of the movement amounts of the two clamping frames is maintained, and the circuit board can be always located at a center detection position when being clamped, thereby ensuring the detection accuracy.

Description

TECHNICAL FIELD

[0001] The utility model relates to a circuit board detection technical field especially a single -sided printed circuit board hole checking device. BACKGROUND

[0002] In order to prevent the tin from penetrating the guide hole of the circuit board during overwave peak welding and causing short circuit, the tin beads are bounced out during overwave peak welding, cause the short circuit of the circuit board, and the corresponding hole filling process treatment will be carried out on the circuit board, but during the processing of the hole filling, the hole filling fullness unqualified, the hole crack, the false copper leakage, the internal bubble cavity and other problems are inevitable, and the overall yield of the circuit board will be influenced, therefore the hole filling position needs to be checked.

[0003] The current checking device mainly clamps the circuit board from both sides through the clamping piece, then drives the circuit board to pass through the backlight lamp plate and the detection probe to carry out the check, but the clamping pieces of both sides of the checking device are independently driven when clamping the circuit board, and the moving amount of both sides can exist difference, thereby it is difficult to guarantee that the circuit board is always clamped in the detection center position, when the circuit board deviates to the side, the backlight detection range is influenced, thereby the accuracy of the detection result is influenced.

[0004] Therefore, we provide a single -sided printed circuit board hole checking device to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a single -sided printed circuit board hole checking device to solve the problems in the background art.

[0006] To achieve the above object, the utility model provides the following technical scheme:

[0007] A single -sided printed circuit board hole checking device, including frame, backlight lamp plate and detection probe, the backlight lamp plate is installed at the inner bottom of frame, the detection probe is erected on the frame, the double -end screw of the inside rotation of frame is installed, and a pair of screw seats is symmetrically screwed on the two screw segments of the double -end screw, and every screw seat is installed one clamping frame below, the opposite sides of clamping frame are rotationally installed with a plurality of cylinders respectively, a plurality of cylinders are equidistantly arranged into a row along the length direction of clamping frame, the bottom of cylinder is coaxially connected with synchronous pulley one, and a plurality of cylinder synchronous pulley one is sleeved with synchronous belt one, to realize synchronous rotation, the clamping frame is also installed with motor one that rotates one of the cylinders.

[0008] In further embodiments, the double -end screw and the screw seat are symmetrically provided with two groups, and the spacing between the two double -end screws is greater than the length of the single -sided printed circuit board.

[0009] In a further embodiment, the two double-end screws are connected with two synchronous wheels II, and the two synchronous wheels II are sleeved with a synchronous belt II.

[0010] In a further embodiment, the opposite side plates of the clamping frame are provided with through slots corresponding to the rollers, and the rollers partially protrude out of the through slots.

[0011] In a further embodiment, the clamping frame is provided with arc-shaped guide portions at two ends.

[0012] In a further embodiment, the outer circumferential side of the roller is connected with an anti-skid layer.

[0013] In a further embodiment, the anti-skid layer is made of elastic rubber or silica gel.

[0014] Compared with the prior art, the utility model has the beneficial effects that:

[0015] The double-end screw can synchronously drive the two screw seats to move in opposite directions when rotating, so that the two clamping frames are close to or away from each other, the consistency of the movement amount of the two clamping frames is maintained, the circuit board can be always in the central detection position when clamping the circuit board, and the detection accuracy is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a front perspective structural schematic view of the utility model;

[0017] Figure 2 It is a rear perspective structural schematic view of the utility model;

[0018] Figure 3 It is a double-end screw, screw seat and clamping frame installation structural schematic view of the utility model;

[0019] Figure 4 It is a clamping frame internal structure schematic view of the utility model.

[0020] In the drawing: 1, rack; 2, backlight plate; 3, detection probe; 4, double-end screw; 5, screw seat; 6, clamping frame; 61, through slot; 62, guide portion; 7, roller; 71, anti-skid layer; 8, synchronous wheel I; 9, synchronous belt I; 10, motor I; 11, synchronous wheel II; 12, synchronous belt II; 13, motor II. DETAILED DESCRIPTION

[0021] In the description of the utility model, it is necessary to understand that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or positional relationship shown based on the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as a limitation on the utility model. In the description of the utility model, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0022] In the description of the utility model, it should be explained that, unless otherwise specified and limited, the terms "installation", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication inside two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood through specific circumstances.

[0023] The technical solutions in the embodiments of the utility model will be described clearly and completely in the drawings in the embodiments of the utility model, obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary skilled persons in the art without creative labor belong to the scope of protection of the utility model.

[0024] Please refer to Figures 1-2 A single-sided printed circuit board hole inspection device, comprising a rack 1, a backlight plate 2 and a detection probe 3, the backlight plate 2 is installed at the inner bottom of the rack 1, the detection probe 3 is erected on the rack 1, the backlight plate 2 is lighted from below the circuit board, the detection probe 3 is a probe with imaging function, which can adopt but is not limited to ultrasonic probe, infrared probe, ordinary visual probe and the like, considering that the size of the circuit board to be inspected is different, a double-head screw rod 4 is rotatably installed in the inside of the rack 1, the double-head screw rod 4 is composed of two screw threads with opposite screw thread directions, and a pair of screw seats 5 is symmetrically screwed on the two screw threads, and a clamping frame 6 is installed below each screw seat 5, when the double-head screw rod 4 rotates, it can synchronously drive the two screw seats 5 to move in opposite directions, so that the two clamping frames 6 approach or move away from each other, and the consistency of the movement of the two clamping frames 6 is maintained.

[0025] Please refer to Figures 3-4, considering that the prior art adopts the belt clamping circuit board to move, when clamping too tight, the belt is easy to deform between the pulleys, which is not conducive to long-term use, and the stability is poor, therefore, a plurality of rollers 7 are rotatably installed on the opposite sides of the clamping frame 6, when the clamping frame 6 clamps the circuit board from both sides, the rollers 7 are in contact with the circuit board, the plurality of rollers 7 are equidistantly arranged in a row along the length direction of the clamping frame 6, the bottom end of the roller 7 is coaxially connected with a synchronous wheel one 8, the synchronous wheel one 8 of the plurality of rollers 7 is sleeved with a synchronous belt one 9 to realize synchronous rotation, the clamping frame 6 is further provided with a motor one 10 for driving one of the rollers 7 to rotate, when the motor one 10 drives one of the rollers 7 and the synchronous wheel one 8 fixed coaxially therewith to rotate, the remaining synchronous wheel one 8 and the roller 7 can be driven to rotate synchronously under the transmission of the synchronous belt one 9, so that the circuit board can move under the detection probe 3 during clamping.

[0026] Please refer to Figures 1-3 , in order to improve the stability of the clamping frame 6 when moving, the double-headed screw 4 and the screw seat 5 are symmetrically provided with two groups, and the distance between the two double-headed screws 4 is greater than the length of the single-sided printed circuit board, so as to ensure that the two double-headed screws 4 will not block the detection area, the end of the two double-headed screws 4 connected with the synchronous wheel two 11 is connected with the synchronous belt two 12, and the other end of one of the double-headed screws 4 is connected with the motor two 13, the main part of the motor two 13 is fixed to the side wall of the rack 1, so that when one of the double-headed screws 4 is driven to rotate by the motor two 13, the synchronous wheel two 11 connected therewith is driven to rotate, the synchronous wheel two 11 drives the other synchronous wheel two 11 to rotate through the synchronous belt two 12, and the other double-headed screw 4 is driven to rotate synchronously, the two double-headed screws 4 can also limit each other to prevent the screw seat 5 from deflecting when moving.

[0027] Please refer to Figures 3-4 , in order to facilitate the contact between the roller 7 and the circuit board, and further assist the movement of the circuit board, the opposite side plates of the clamping frame 6 are provided with a through slot 61 corresponding to each roller 7, and the roller 7 partially protrudes out of the through slot 61 and further protrudes out of the side of the clamping frame 6, so as to facilitate contact with the circuit board.

[0028] Further, the outer circumferential side of the roller 7 is connected with an anti-skid layer 71, the material of the anti-skid layer 71 is elastic rubber or silicone, the anti-skid layer 71 not only effectively prevents the circuit board from slipping with the roller 7, ensures the smoothness of movement, but also reduces the pressure loss of the circuit board caused by the hard material of the roller 7.

[0029] Please refer to Figure 3 , the two ends of the clamping frame 6 are provided with arc-shaped guide portions 62, so that it is more convenient to place or take out the circuit board from the end of the clamping frame 6, which is conducive to reducing the bumping between the circuit board and the clamping frame 6.

[0030] It will be obvious to a person skilled in the art that the application is not limited to the details of the above-described exemplary embodiments, but that the application can be implemented in other concrete forms without departing from the spirit or essential characteristics of the application. The embodiments should, therefore, be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the above description, and all changes which come within the meaning and range of equivalents of the claims are therefore intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the scope of the claims concerned.

[0031] Furthermore, it should be understood that although the present specification describes exemplary embodiments, the application is not limited to only one independent technical solution in each embodiment, and the specification is described in this way only for the sake of clarity. A person skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that a person skilled in the art can understand.

Claims

1. A single-sided printed circuit board plug hole inspection device, comprising a frame (1), a backlight board (2) and a detection probe (3), wherein the backlight board (2) is mounted on the inner bottom of the frame (1), and the detection probe (3) is mounted on the frame (1), characterized in that: A double-headed screw (4) is rotatably mounted inside the frame (1), a pair of screw seats (5) are symmetrically screwed on the two threaded sections of the double-headed screw (4), and a clamping frame (6) is mounted under each screw seat (5), and a plurality of rollers (7) are rotatably mounted on opposite sides of the clamping frame (6), and the plurality of rollers (7) are arranged in rows at equal distances along the length direction of the clamping frame (6), and a synchronous wheel (8) is coaxially connected to the bottom end of the roller (7), and a synchronous belt (9) is externally connected to the synchronous wheel (8) of the plurality of rollers (7) to achieve synchronous rotation, and a motor (10) for driving one of the rollers (7) to rotate is also mounted under the clamping frame (6).

2. The single-sided printed circuit board plugging inspection device according to claim 1, characterized in that: The double-headed screw rods (4) and screw seats (5) are symmetrically arranged in two groups, and the distance between the two double-headed screw rods (4) is greater than the length of the single-sided printed circuit board.

3. The single-sided printed circuit board plugging inspection device according to claim 1, characterized in that: The ends of the two double-headed screw rods (4) passing through the same side of the frame (1) are connected to the second synchronous wheel (11), and the two second synchronous wheels (11) are connected with the second synchronous belt (12). The other end of one of the double-headed screw rods (4) passes through the other side of the frame (1) and is connected to the second motor (13).

4. The single-sided printed circuit board plugging inspection device according to claim 1, characterized in that: The opposite side plates of the clamping frame (6) are provided with through grooves (61) corresponding to the rollers (7) one by one, and the rollers (7) partially protrude outside the through grooves (61).

5. The single-sided printed circuit board plugging inspection device according to claim 1, characterized in that: Both ends of the clamping frame (6) are provided with arc-shaped guide portions (62).

6. The single-sided printed circuit board plugging inspection device according to claim 1, characterized in that: An anti-slip layer (71) is connected to the outer circumferential side surface of the roller (7).

7. The single-sided printed circuit board plugging inspection device according to claim 6, characterized in that: The anti-slip layer (71) is made of elastic rubber or silicone.

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