CN110883732A

CN110883732A - Circuit board extractor

Info

Publication number: CN110883732A
Application number: CN201911157772.5A
Authority: CN
Inventors: 陈渝; 任静; 黄超; 张凯; 周黎明; 李兴钢; 谭建华
Original assignee: Chengdu CAIC Electronics Co Ltd
Current assignee: Chengdu CAIC Electronics Co Ltd
Priority date: 2019-11-22
Filing date: 2019-11-22
Publication date: 2020-03-17
Anticipated expiration: 2039-11-22
Also published as: CN110883732B

Abstract

The invention discloses a circuit board extractor, and aims to provide an extractor which is convenient to assemble, disassemble and assemble and reliable in plugging. The invention is realized by the following technical scheme: the cam handle is connected with the cam through the side-wide slot of the free end of the mounting plate, the mounting plate is linked with the crank connecting rod to be far away from the side plate and performs combined motion of rotation and translation, the free ends of the upper deflector rod and the lower deflector rod are provided with pulling hooks for pulling out the circuit board, the pulling hooks are transversely inserted into pin holes of the circuit board to be pulled out, the force direction for pulling the cam handle is changed into clockwise rotation parallel to the side plate, the outer curve profile of the cam is always in contact with the limit stop, the cam handle rotates clockwise, the circumferential radius of the outer curve profile of the cam is gradually increased, the cam rotates to the left horizontal position and touches the limit stop, the limit stop pushes out and pushes the mounting plate to the right side through reaction force, the pulling hooks on the upper deflector rod and the lower deflector rod synchronously drive the circuit board to be pulled out.

Description

Circuit board extractor

Technical Field

The invention relates to a power assisting device for pulling a circuit board.

Background

With the continuous development of electronic technology, the demand of high-capacity, high-speed and high-reliability electronic equipment is increasing, the number of high-density connector single board plug-ins is increasing, the plugging force of the single board plug-ins is very large, and the requirement on reliability is very high. The traditional single board plug-in component pulling structure has the defects of small force arm and insufficient insertion force, and the simple increasing force arm can cause the problems of deformation, shaking and the like of the pulling device, thereby influencing the reliability of the single board. The traditional circuit system mostly adopts a backplane connector to realize the intercommunication of circuits, and as a plurality of circuit boards on a backplane, the circuit boards are independent in function, often the circuit boards cannot work independently, and the circuit boards can work only by realizing the interconnection of electric signals through the backplane. In order to debug the circuit system of the single board or in the rapid test, the circuit board 15 is separated from the original circuit system, and the circuit board is placed in another computer test system, and the computer test system independently supplies power to the circuit board, applies an input excitation signal, and receives an output signal of the circuit board. In order to match the circuit board, the test system also uses a backplane connector matched with the circuit board, and the circuit board is often inserted into the backplane connector inside the test system in order to protect and ensure the stability of the test of the circuit board. In order to reduce weight or save space, in order to smoothly and quickly take out or fixedly mount the circuit board from the electronic chassis in debugging, mounting and troubleshooting processes, only pull-out holes are usually reserved on the circuit board. For the circuit system with more complex system, the signal is more, the more the single board plug-ins of the high-density connector are, the plug-in force of the single board plug-ins is very large, and the plug-in force of the circuit board and the backplane connector is larger. Without suitable means for removing the circuit board, it is easy to make the circuit board relatively easy to insert and the removal is doubly difficult due to the limitations of force and space. The traditional single board plug-in component pulling structure has the defects of small force arm and insufficient insertion force, and the simple increasing force arm can cause the problems of deformation, shaking and the like of the pulling device, thereby influencing the reliability of the single board. The circuit board puller on the market at present generally has a complex structure and is inconvenient to use, and when a printed board needs to be locked and fixed, the circuit board can be pulled up only by means of other tools. It is therefore important to add suitable extraction means to the test system.

Disclosure of Invention

The invention aims to provide a flexible and reliable taking and pulling device for a printed circuit board, which has a simple structure and is convenient to assemble, disassemble and assemble and plug aiming at the taking and pulling requirements of the circuit board in a computer test system.

The object of the present invention can be achieved by the following means. A circuit board extractor comprising: hinge seat 9 articulates mounting panel 2 on curb plate 1 through crank connecting rod 12 activity articulates upper and lower poking rod 3 on the sunken step in 2 broadside both sides of mounting panel, fixes at 2 free ends of mounting panel in the cam window around axis of rotation pivoted cam 7, its characterized in that: the side plate 1 is provided with a slide block 10 which can ensure the horizontal movement of the mounting plate 2 left and right and can support the cam 7, the cam handle 6 is connected with the cam 7 through a lateral broadside slot at the free end of the mounting plate 2, the mounting plate 2 is linked with a crank connecting rod 12 to be far away from the side plate 1 and does a combined movement of rotation and translation, a pulling hook 5 for pulling the circuit board 15 is arranged at the free end of an upper pulling rod 3 and a lower pulling rod 3 and is transversely inserted into a bolt hole of the circuit board 15 to be pulled, the force direction for pulling the cam handle 6 is changed into clockwise rotation parallel to the side plate 1, the cam 7 rotates around a cam rotating shaft 8 in a cam window of the mounting plate 2, the outer curve profile of the cam 7 is always kept in contact with a limit stop 14 on the left side of the cam 7, the circumference radius of the outer curve profile of the cam 7 at the contact position of the limit stop 14, at the moment, the maximum circumferential radius of the cam 7 rotates to the left horizontal position, the cam 7 touches the limit stop 14, the limit stop 14 pushes out and pushes the mounting plate 2 to the right side through reaction force, the pulling hooks 5 on the upper and lower pulling rods 3 synchronously drive the circuit board 15 to be pulled to move rightwards, and then the circuit board 15 is separated from the left side, and the circuit board 15 is pulled out from the backplane connector.

The invention has the following beneficial effects:

the invention adopts the circuit board 15 which moves along with the mounting plate 2 of the extractor, the operation is stable and has no deformation and shaking in the process of the right movement of the mounting plate 2, and the whole process of the right movement and extraction of the circuit board 15 is stable and reliable. The circuit board 15 of the computer test system can be quickly pulled out, the circuit board 15 can be pulled out from the backplane connector uniformly, the pulling-out mode is simple and convenient, and the difficulty that the original computer test system does not have the device and needs to be pulled out manually is avoided.

According to the invention, the pulling hooks 5 on the upper pulling rod 3 and the lower pulling rod 3 are transversely inserted into the pin holes of the circuit board 15 to be pulled, and move along with the mounting plate 2 in the right direction to pull out the circuit board 15 from the backplane connector, so that the whole mechanism has relatively few moving parts, clear structure, sufficient strength and reliable movement, the cam handle 6 is pulled clockwise manually, the main power arm is long, and the circuit board 15 can be reliably pulled out from the backplane connector. After the circuit board 15 is pulled out, the clockwise external force on the cam handle 6 is released, and the mounting plate 2 moves leftwards and resets under the action of a tension spring 13 indicated by a dotted line on the spring seat 11; meanwhile, the other tension spring 4 is arranged, one end of the left side of the tension spring is fixed in a hole in the middle of the mounting plate 2, and the other end of the tension spring is connected to a hook of the cam 7, so that the cam 7 rotates and resets along the counterclockwise direction. Therefore, the device has the functions of pulling and resetting.

The function of the whole device is simply understood to be completed by the pulling-out of the circuit board 15 and the resetting of the device through the motion processes of bolt falling, cam rotation, pulling rod movement, bolt pulling and tension spring resetting. The whole mechanism has relatively few moving parts, is a pure mechanical moving mechanism and belongs to a simple rotating and translating mechanism, so that the device is simple and convenient to assemble and adjust, the motion process is simple to execute, the motion is clear, the moment is amplified by lengthening the main power arm of the cam handle 6, the insertion and extraction force of the connector of the circuit board 15 can be easily overcome, and the device is flexible and reliable.

Drawings

Fig. 1 is a schematic diagram of the structure of the new circuit board 15 extractor of the present invention.

Fig. 2 is a front three-dimensional schematic view of fig. 1.

Fig. 3 is a rear three-dimensional schematic view of fig. 1.

Fig. 4 is a top view of fig. 1.

Fig. 5 is a perspective view of the cam.

Fig. 6 shows the circuit board 15 at the reset point of the extractor.

Fig. 7 is the point of extraction of the circuit board 15 at the extractor.

In the figure: the device comprises a side plate 1, a mounting plate 2, a driving lever 3, a tension spring 4, a pulling hook 5, a cam handle 6, a cam 7, a cam rotating shaft 8, a hinge seat 9, a sliding block 10, a spring seat 11, a crank connecting rod 12, a tension spring 13, a limit stop 14 and a circuit board 15.

The invention is further illustrated with reference to the following figures and examples, without thereby limiting the scope of the invention to the described examples.

Detailed Description

See fig. 1-5. In a preferred embodiment described below, a circuit board 15 extractor comprises: hinge seat 9 articulates mounting panel 2 on curb plate 1 through crank connecting rod 12 activity articulates upper and lower poking rod 3 on the sunken step in 2 broadside both sides of mounting panel, fixes at 2 free ends of mounting panel in the cam window around axis of rotation pivoted cam 7, its characterized in that: the side plate 1 is provided with a slide block 10 which can ensure the horizontal movement of the mounting plate 2 left and right and can support the cam 7, the cam handle 6 is connected with the cam 7 through a lateral broadside slot at the free end of the mounting plate 2, the mounting plate 2 is linked with a crank connecting rod 12 to be far away from the side plate 1 and does a combined movement of rotation and translation, a pulling hook 5 for pulling the circuit board 15 is arranged at the free end of an upper pulling rod 3 and a lower pulling rod 3 and is transversely inserted into a bolt hole of the circuit board 15 to be pulled, the force direction for pulling the cam handle 6 is changed into clockwise rotation parallel to the side plate 1, the cam 7 rotates around a cam rotating shaft 8 in a cam window of the mounting plate 2, the outer curve profile of the cam 7 is always kept in contact with a limit stop 14 on the left side of the cam 7, the circumference radius of the outer curve profile of the cam 7 at the contact position of the limit stop 14, at the moment, the maximum circumferential radius of the cam 7 rotates to the left horizontal position, the cam 7 touches the limit stop 14, the limit stop 14 pushes out and pushes the mounting plate 2 to the right side through reaction force, the pulling hooks 5 on the upper and lower pulling rods 3 synchronously drive the circuit board 15 to be pulled out to move rightwards, and then the circuit board 15 is separated from the left side to pull out the circuit board 15 from the backplane connector.

When in operation, the cam handle 6 is shifted towards a direction far away from the side plate 1 (namely far away from the paper surface in the figure) by hand, so that the pulling hooks 5 on the upper and lower shifting rods 3 can be transversely inserted into the pin holes of the circuit board 15 to be pulled. After the pulling hook 5 is transversely inserted into the plug pin hole of the circuit board 15, the force application direction for pulling the cam handle 6 away from the side plate 1 is changed into the clockwise rotation parallel to the side plate 1, the cam 7 rotates on the mounting plate 2 around the cam rotating shaft 8, the outer curve profile of the cam 7 is always kept in contact with the limit stop 14 on the left side of the cam 7 for limiting, the circumferential radius of the outer curve profile of the cam 7 at the contact position with the limit stop 14 is gradually increased along with the clockwise rotation of the cam handle 6, when the cam handle 6 rotates clockwise to the stop position, the large diameter (the maximum circumferential radius) of the cam 7 rotates to the horizontal position on the left side at the moment, namely, the large diameter horizontal rotation of the cam 7 touches the limit stop 14. In the whole clockwise rotation process of the cam handle 6, because the limit stop 14 is fixed on the side plate 1 as a limit and can not move, the limit stop 14 pushes the space position of the cam rotating shaft 8 for positioning the central rotating shaft of the cam 7 towards the right side through a reaction force, the cam rotating shaft 8 of the cam 7 is fixed on the mounting plate 2, and the mounting plate 2 can move towards the right side on the side plate 1 through a crank connecting rod 12 hinge, namely, the limit stop 14 pushes out and pushes the mounting plate 2 towards the right side through the gradually increased circumference radius of the cam outer curve profile on the cam 7. The upper and lower poking rods 3 fixed on the mounting plate 2 and the pulling hooks 5 on the upper and lower poking rods 3 synchronously move, the pulling hooks 5 drive the circuit board 15 to be pulled to move rightwards, so that the circuit board 15 is separated from the left side, and the circuit board 15 is separated.

The cam rotating shaft 8 is vertically installed (perpendicular to the paper) inside the mounting plate 2 through the shaft hole of the cam 7, the cam rotating shaft 8 is fastened to the mounting plate 2, and the cam 7 can be rotated by the cam rotating shaft 8.

In fig. 2, the hinge base 9 is fixed to the side plate 1. The slider 10 is fixed to the side plate 1 as shown in the figure.

In fig. 3 and 4, a spring seat 11 fixed corresponding to the hinge seat 9 is arranged at the back end of the side plate 1, and the tension spring 13 penetrates through a strip-shaped hole in the middle of the side plate 1 through the spring seat 11 and is connected with the mounting plate 2. The limit stopper 14 fixed to the side plate 1 limits the mounting plate 2 from colliding against the side plate 1 with respect to the hinge base 9. The crank connecting rod 12 is fixed on the hinge seat 9 and is connected to the fixed end of the mounting plate 2 through a pin shaft, the crank connecting rod 12 rotates by taking the pin shaft as an axis, and the rotation limit angle is determined by the leftward stop position of the crank connecting rod 12 and the maximum displacement of the right movement of the deflector rod 3 fixed on the mounting plate 2.

The limit stop 14 is fixed to the side plate 1. The spring seat 11 is fixed to the side plate 1.

The spring plate 11, which is attached to the mounting plate 2 and is fixed to the upper rear part of the side plate 1, is shown by a broken line as a tension spring 13, and its function is that there is always a force that moves the mounting plate 2 to the left. Meanwhile, the other tension spring 4 is arranged, one end of the left side of the tension spring is fixed in a hole in the middle of the mounting plate 2, the other end of the tension spring is connected to a hook of the cam 7, and the tension spring is used for enabling the cam 7 to rotate and reset along the anticlockwise direction.

See fig. 5. The lug at the upper right of the cam is provided with a hanging hole connected with a tension spring 4, the middle part of the cam body is provided with a shaft hole assembled with a cam rotating shaft 8, the side part of the cam body is provided with a threaded hole connected with a cam handle 6, and the cam rotating shaft (8) penetrates through the cam shaft hole to position the cam on the mounting plate (2).

When the mounting plate 2 moves to the right, the motion track and the maximum distance are restricted by the rectangular crank connecting rod 12.

When the mounting plate 2 is moved to the right to bring out the circuit board 15, the cam lever 6 is pressed toward the side plate 1 (i.e., toward the paper surface in the figure), so that the hook 5 can be disengaged from the circuit board 15. During the downward pressing of the cam handle 6 and the right movement of the mounting plate 2, the slide block 10 fixed on the side plate 1 can not only ensure the horizontal operation of the mounting plate 2, but also support the cam 7 and the mounting plate 2.

After the circuit board 15 is pulled out, the clockwise external force on the cam handle 6 is released, and the mounting plate 2 moves leftwards and resets under the action of a tension spring 13 indicated by a dotted line on the spring seat 11; meanwhile, the other tension spring 4 is arranged, one end of the left side of the tension spring is fixed in a hole in the middle of the mounting plate 2, and the other end of the tension spring is connected to a hook of the cam 7, so that the cam 7 rotates and resets along the counterclockwise direction. Therefore, the device has the functions of pulling and resetting.

See fig. 6-7. The cam handle 6 is not yet rotated clockwise, the pulling-up hook 5 is at the initial position of the circuit board 15, which is the initial position when the drawer is ready to pull out the circuit board 15, the circuit board 15 is at the pulling-out point of the drawer shown in fig. 7, the state of pulling out the circuit board 15 is at the reset point of the drawer, and the circuit board 15 is at the reset point of the drawer. The crank connecting rod 12 rotates towards the right side, the cam handle 6 rotates clockwise to the stop position, the pulling hook 5 moves to the right compared with the drawing 6, the circuit board 15 is driven to be separated from the left side, and the circuit board 15 is separated.

The foregoing is directed to the preferred embodiment of the present invention and it is noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.

Claims

1. A circuit board extractor comprising: hinge mounting panel (2) on curb plate (1) through hinge seat (9), through upper and lower driving lever (3) of crank connecting rod (12) activity hinge on mounting panel (2) broadside both sides step that sinks, fix and revolute rotating shaft pivoted cam (7), its characterized in that in mounting panel (2) free end upper cam window: the side plate (1) is provided with a slide block (10) which can ensure the horizontal movement of the mounting plate (2) left and right and can support the cam (7), the cam handle (6) is connected with the cam (7) by slotting the free end of the mounting plate (2) to the wide side, the mounting plate (2) is linked with a crank connecting rod (12) to be far away from the side plate (1) to do the combined movement of rotation and translation, the free end of the upper and lower deflector rods (3) is provided with a pulling hook (5) for pulling the circuit board (15), the pulling hook is transversely inserted into a pin hole of the circuit board (15) to be pulled, the force direction for pulling the cam handle (6) is changed into the clockwise rotation parallel to the side plate (1), the cam (7) rotates around the cam rotating shaft (8) of the cam in the cam window of the mounting plate (2), the outer curve profile of the cam (7) is always kept in contact with the limit stop (14) on the left side, the radius of the circumference of the outer curve profile of the cam (7) at the contact position with the limit stop (14) is gradually increased, the cam handle (6) rotates clockwise to the stop position, the maximum radius of the circumference of the cam (7) rotates to the horizontal position on the left side at the moment, the limit stop (14) is touched, the limit stop (14) passes through the reaction force, the cam (7) ejects and pushes the mounting plate (2) to the right side, the pulling hooks (5) on the upper and lower pulling rods (3) synchronously move to the right to drive the circuit board (15) to be pulled out, and then the circuit board (15) is separated from the left side, and the circuit board (15) is pulled out from the backboard connector.

2. The circuit board extractor of claim 1, wherein: in the clockwise rotation process of the cam handle (6), the limit stop (14) is fixed on the side plate (1) and can not move as limiting, the space position of the cam rotating shaft (8) for positioning the central rotating shaft of the cam (7) is pushed towards the right side by the limit stop (14) through reaction force, the cam rotating shaft (8) is fixed on the mounting plate (2), the mounting plate (2) moves towards the right side on the side plate (1) through a crank connecting rod (12) hinge, and the limit stop (14) ejects and pushes the mounting plate (2) towards the right side through the gradually increased circumference radius of the cam outer curve profile on the cam (7).

3. The circuit board extractor of claim 1, wherein: the cam rotating shaft (8) penetrates through the shaft hole of the cam (7) to be vertically arranged on the inner side of the mounting plate (2), the cam rotating shaft (8) is fastened on the mounting plate (2), and the cam (7) rotates through the cam rotating shaft (8).

4. The circuit board extractor of claim 1, wherein: the back end of the side plate (1) is provided with a spring seat (11) fixed corresponding to the hinge seat (9), and the tension spring (13) penetrates through a strip-shaped hole in the middle of the side plate (1) to be connected with the mounting plate (2) through the spring seat (11).

5. The circuit board extractor of claim 1, wherein: the limiting stop block (14) fixed on the side plate (1) limits the mounting plate (2) from colliding with the side plate (1) relative to the hinge seat (9).

6. The circuit board extractor of claim 1, wherein: the crank connecting rod (12) is fixed on the hinge seat (9) and is connected to the fixed end of the mounting plate (2) through a pin shaft, the crank connecting rod (12) rotates by taking the pin shaft as an axis, and the rotation limit angle is determined by the leftward stop position of the crank connecting rod (12) and the maximum displacement of the right movement of the deflector rod 3 fixed on the mounting plate (2).

7. The circuit board extractor of claim (1), wherein: a hanging hole connected with a tension spring (4) is formed in a lug at the upper right of the cam, a shaft hole assembled with a cam rotating shaft (8) is formed in the middle of the cam body, a threaded hole connected with a cam handle (6) is formed in the lateral direction of the cam body, and the cam rotating shaft (8) penetrates through the cam shaft hole to position the cam on the mounting plate (2).

8. The circuit board extractor of claim 1, wherein: when the mounting plate (2) moves towards the right side, the motion trail and the maximum distance of the mounting plate are constrained by the rectangular crank connecting rod (12); after the mounting plate (2) is moved to the right to take out the circuit board (15), the cam handle (6) is pressed towards the side plate (1) to make the pulling hook (5) separate from the circuit board (15).

9. The circuit board extractor of claim 1, wherein: during the downward pressing of the cam handle (6) and the right movement of the mounting plate (2), the sliding block (10) fixed on the side plate (1) can ensure that the mounting plate (2) runs horizontally and can support the cam (7) and the mounting plate (2).

10. The circuit board extractor of claim 1, wherein: the cam handle (6) does not rotate clockwise, the pulling hook (5) is positioned at the initial position of the circuit board (15), the initial position is the initial position when the circuit board (15) is ready to be pulled out by the drawer, the circuit board (15) is at the pulling-out point of the drawer, the circuit board (15) is in the state of being pulled out, and the circuit board (15) is at the reset point of the drawer; the crank connecting rod (12) rotates towards the right side, the cam handle (6) rotates clockwise to a stop position, the pulling hook (5) moves rightwards, the circuit board (15) is driven to be separated from the left side, and the circuit board (15) can be separated.