Suction device for trimming circuit board pins

Abstract

The utility model provides a suction device for circuit board pin trimming. The suction device comprises a base, an adapter pipe and a suction assembly. The base is fixedly mounted above a scissor body of the scissors, a suction through hole is formed in the base and is obliquely arranged at a preset angle, and one end of the suction through hole faces a blade shearing position of the scissors; one end of the adapter tube is communicated with the other end of the suction through hole; the suction assembly comprises a negative pressure box and a connecting hose; a negative pressure pump is arranged in the negative pressure box, one end of the connecting hose communicates with the other end of the adapter pipe, and the air exhaust end of the negative pressure pump is used for communicating with the other end of the connecting hose. The suction device can achieve negative pressure suction of the cutting edge shearing position, so that when a worker operates the cutting edge of the scissors to shear pins to be sheared, the sheared waste pins are sucked into the suction through hole at the first time, the waste pins can be effectively prevented from being splashed down willfully, and the work efficiency is improved. Therefore, the yield of the circuit board and the life and property safety of workers are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit board processing, in particular to a suction device used for trimming pins of a circuit board. Background Art

[0002] Wave soldering is mainly used to position and solder the pins of plug-in electronic components to the through-holes of the circuit board. Generally, after soldering, the pins of the plug-in electronic components are exposed too long, so the pins need to be trimmed, that is, the pins need to be shortened.

[0003] At present, there are two common ways to trim pins in the industry. The first is to use pin trimming equipment to trim the pins. However, existing pin trimming equipment is difficult to perform trimming work on complex circuit boards, especially for complex circuit boards that contain electronic components on both sides of the circuit board. That is, there are many other electronic components near the exposed pins. If existing pin trimming equipment is used for trimming, it is often easy to bump and damage other electronic components around the pins.

[0004] Therefore, the second method of trimming pins is usually adopted, that is, manual trimming. Specifically, workers use scissors to perform targeted manual trimming. However, during the manual trimming process, the discarded pins that are cut off are prone to randomly splashing and scratching the circuit board, resulting in a decrease in the yield rate of the circuit board. In severe cases, the pins may even accidentally injure the workers' eyes. Utility Model Content

[0005] The purpose of the utility model is to overcome the shortcomings of the existing technology and provide a suction device for circuit board pin trimming that can effectively prevent the discarded pins that are cut from being splashed and scratching the circuit board during the manual trimming process, thereby ensuring the yield rate of the circuit board and the safety of life and property of the staff.

[0006] The purpose of this utility model is achieved through the following technical solutions:

[0007] A suction device for trimming circuit board pins, comprising:

[0008] The base is fixedly mounted above the scissors body, the base is provided with a suction through hole, and the suction through hole is tilted at a preset angle so that one end of the suction through hole faces the shearing position of the scissors;

[0009] a transfer pipe, one end of which is connected to the other end of the suction through hole;

[0010] The suction assembly includes a negative pressure box and a connecting hose; a negative pressure pump is provided in the negative pressure box, one end of the connecting hose is connected to the other end of the transfer tube, and the suction end of the negative pressure pump is used to communicate with the other end of the connecting hose.

[0011] In one embodiment, one end of the transfer tube is detachably connected to the base.

[0012] In one embodiment, an external threaded portion is formed on an outer peripheral wall of one end of the transfer tube, and an internal threaded portion is formed on an inner peripheral wall of the other end of the suction through hole, and the external threaded portion is threadedly connected to the internal threaded portion.

[0013] In one embodiment, one end of the connecting hose is sleeved on the other end of the transfer tube, and one end of the connecting hose and the other end of the transfer tube are interference fit.

[0014] In one embodiment, the suction device further includes a cable tie, which is used to tie the connecting hose to the outer wall of the adapter tube.

[0015] In one embodiment, an obliquely expanded hole is formed at the end of one end of the suction through hole, and the obliquely expanded hole covers the shearing position of the blade of the scissors.

[0016] In one embodiment, the preset angle is 30 degrees to 60 degrees.

[0017] In one embodiment, the suction device for trimming circuit board pins also includes a fastening assembly, which includes a fastener and a positioning pin; the end of the base facing away from the suction through hole is fixedly connected to the scissors body of the scissors through the fastener, and the positioning pin is used to position the base and the scissors body of the scissors.

[0018] In one embodiment, a collection cabinet is further provided in the negative pressure box, and the collection cabinet is used to collect discarded needles. The collection cabinet is detachably connected to the negative pressure box.

[0019] Compared with the prior art, the present invention has at least the following advantages:

[0020] By installing a base with a suction through hole above the scissors body of the scissors, and the suction through hole is inclined at a preset angle, one end of the suction through hole is directed toward the cutting position of the blade of the scissors; at the same time, the negative pressure pump in the negative pressure box always keeps a working state, that is, the suction end of the negative pressure pump can realize negative pressure suction on the blade shearing position through the connecting hose and the adapter tube connected thereto, so that when the staff operates the blade of the scissors to cut the pins to be trimmed, the cut waste pins are sucked into the suction through hole at the first time, which can effectively prevent the waste pins from splashing randomly, thereby ensuring the yield of the circuit board and the safety of life and property of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 is a structural cross-sectional view of a suction device for trimming circuit board pins in one embodiment;

[0023] Figure 2 for Figure 1 A schematic diagram of the structure of the scissors of the suction device for trimming the pins of the circuit board is shown;

[0024] Figure 3 for Figure 1 A schematic structural diagram of a suction assembly of a suction device for trimming circuit board pins is shown;

[0025] Figure 1: Suction device 10 for trimming circuit board pins; base 100; suction through hole 101; oblique expansion hole 102; scissors 200; blade cutting position 201; adapter tube 300; suction assembly 400; negative pressure box 410; connecting hose 420; cable tie 500; fastening assembly 600; fastener 610; positioning pin 620. DETAILED DESCRIPTION

[0026] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be provided below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosure of the present invention.

[0027] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly attached to the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are intended solely for the purpose of describing specific embodiments and are not intended to limit this invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0029] The present disclosure provides a suction device for trimming circuit board pins, comprising a base, an adapter tube, and a suction assembly. The base is fixedly mounted above the scissors body, and is provided with a suction through-hole. The suction through-hole is tilted at a preset angle, with one end of the suction through-hole facing the cutting position of the scissors. One end of the adapter tube is connected to the other end of the suction through-hole. The suction assembly comprises a negative pressure box and a connecting hose. A negative pressure pump is provided within the negative pressure box, one end of the connecting hose is connected to the other end of the adapter tube, and the suction end of the negative pressure pump is used to connect to the other end of the connecting hose.

[0030] See also Figures 1 to 3 In order to better understand the suction device 10 for trimming circuit board pins of the present application, the suction device 10 for trimming circuit board pins is further explained below:

[0031] A suction device 10 for trimming circuit board pins in one embodiment includes a base 100, a transfer tube 300, and a suction assembly 400. The base 100 is fixedly mounted above the scissors body 200. The base 100 is provided with a suction through-hole 101. The suction through-hole 101 is tilted at a preset angle so that one end of the suction through-hole 101 faces the cutting position 201 of the blade of the scissors 200. One end of the transfer tube 300 is connected to the other end of the suction through-hole 101. The suction assembly 400 includes a negative pressure box 410 and a connecting hose 420. A negative pressure pump (not shown) is provided in the negative pressure box 410. One end of the connecting hose 420 is connected to the other end of the transfer tube 300. The suction end of the negative pressure pump (not shown) is used to connect to the other end of the connecting hose 420.

[0032] In this embodiment, the base 100 with the suction hole 101 is installed above the scissors body of the scissors 200, and the suction hole 101 is tilted at a preset angle so that one end of the suction hole 101 is facing the blade cutting position 201 of the scissors 200; at the same time, the negative pressure pump (not shown) in the negative pressure box 410 always keeps working, that is, the suction end of the negative pressure pump (not shown) can realize negative pressure suction of the blade cutting position 201 through the connecting hose 420 and the adapter tube 300 connected thereto, so that when the staff operates the blade of the scissors 200 to cut the stitches to be trimmed, the cut waste stitches are sucked into the suction hole 101 at the first time, which can effectively prevent the waste stitches from being splashed, thereby ensuring the yield rate of the circuit board and the safety of life and property of the staff.

[0033] like Figure 1 As shown, in one embodiment, one end of the adapter tube 300 is detachably connected to the base 100. In one embodiment, the outer peripheral wall of one end of the adapter tube 300 is formed with an external thread, and the inner peripheral wall of the other end of the suction through-hole 101 is formed with an internal thread, and the external thread is threadedly connected to the internal thread. This improves the ease of assembly and disassembly of the adapter tube 300 and the base 100, and facilitates subsequent removal and clearing of the adapter tube 300 or the suction through-hole 101 if they become clogged.

[0034] like Figure 1 As shown, in one embodiment, one end of the connecting hose 420 is sleeved on the other end of the transfer tube 300 , and one end of the connecting hose 420 and the other end of the transfer tube 300 are interference fit.

[0035] It can be understood that in this embodiment, the connecting hose 420 has good stretchability, deformability and ductility, so the inner tube wall of one end of the connecting hose 420 is sleeved on the outer tube wall of the other end of the adapter tube 300, so that the two have an interference fit, thereby improving the assembly convenience and practicality of the suction device.

[0036] like Figure 1 As shown, in one embodiment, the suction device 10 further includes a cable tie 500, which is used to tie the connecting hose 420 to the outer wall of the adapter tube 300. This can further improve the connection stability between one end of the connecting hose 420 and the other end of the adapter tube 300, thereby effectively preventing the connection between one end of the connecting hose 420 and the other end of the adapter tube 300 from becoming loose.

[0037] like Figure 1 and Figure 2As shown, in one embodiment, an obliquely expanded hole 102 is formed at the end of one end of the suction through hole 101 , and the obliquely expanded hole 102 covers the blade shearing position 201 of the scissors 200 .

[0038] It can be understood that by providing the obliquely expanded hole 102 and making the obliquely expanded hole 102 cover the blade shearing position 201 of the scissors 200 , it can be effectively ensured that the discarded stitches that are cut are sucked into the suction through hole 101 .

[0039] like Figure 1 and Figure 2 As shown, in one embodiment, the preset angle is 30 degrees to 60 degrees. It should be noted that Y points to the first preset direction, and X is the angle between the central axis of the suction through-hole 101 and the first preset direction, that is, the preset angle. In this embodiment, the angle between the central axis of the suction through-hole 101 and the first preset direction is 35 degrees, that is, the preset angle is 35 degrees, which ensures that the oblique expansion hole 102 can be better aligned and covered with the blade shearing position 201 of the scissors 200, and enables the suction through-hole 101 to be in a straight line path directly to one end of the connecting hose 420.

[0040] like Figure 1 and Figure 2 As shown, in one embodiment, the suction device 10 for trimming circuit board pins further includes a fastening assembly 600, and the fastening assembly 600 includes a fastener 610 and a positioning pin 620; the end of the base 100 facing away from the suction through hole 101 is fixedly connected to the scissors body of the scissors 200 via the fastener 610, and the positioning pin 620 is used to position and connect the base 100 and the scissors body of the scissors 200.

[0041] It can be understood that in this embodiment, the fastener 610 is a fastening screw; and an internal threaded hole is provided on the scissors body of the scissors 200, so that the base 100 can be reliably fixedly connected to the scissors body of the scissors 200 through the threaded end of the fastening screw.

[0042] At the same time, in order to ensure that the base 100 does not rotate as the staff performs trimming work at various angles, in this embodiment, a positioning pin 620 is used to prevent the base 100 from rotating, so that one end of the suction hole 101 is always facing the blade shearing position 201 of the scissors 200, thereby ensuring the suction efficiency of the suction device 10 used for trimming circuit board pins.

[0043] like Figures 1 to 3As shown, in one embodiment, a collection cabinet (not shown) is further provided in the negative pressure box 410. The collection cabinet (not shown) is used to collect discarded needles and is detachably connected to the negative pressure box 410. This allows the operator to easily remove the collection cabinet (not shown) that has collected a sufficient amount of discarded needles from the negative pressure box 410 and replace it with a new one (not shown).

[0044] It should be noted that the cooperative working principle between the negative pressure box, the negative pressure pump and the collection cabinet is a technical means well known to those skilled in the art and will not be introduced in detail here.

[0045] Compared with the prior art, the present invention has at least the following advantages:

[0046] By installing a base with a suction through hole above the scissors body of the scissors, and the suction through hole is inclined at a preset angle, one end of the suction through hole is directed toward the cutting position of the blade of the scissors; at the same time, the negative pressure pump in the negative pressure box always keeps a working state, that is, the suction end of the negative pressure pump can realize negative pressure suction on the blade shearing position through the connecting hose and the adapter tube connected thereto, so that when the staff operates the blade of the scissors to cut the pins to be trimmed, the cut waste pins are sucked into the suction through hole at the first time, which can effectively prevent the waste pins from splashing randomly, thereby ensuring the yield of the circuit board and the safety of life and property of the staff.

[0047] The above-described embodiments merely represent several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. A suction device for trimming circuit board pins, characterized in that: include: The base is fixedly mounted above the scissors body, the base is provided with a suction through hole, and the suction through hole is tilted at a preset angle so that one end of the suction through hole faces the shearing position of the scissors; a transfer pipe, one end of which is connected to the other end of the suction through hole; The suction assembly includes a negative pressure box and a connecting hose; a negative pressure pump is provided in the negative pressure box, one end of the connecting hose is connected to the other end of the transfer tube, and the suction end of the negative pressure pump is used to communicate with the other end of the connecting hose.

2. The suction device for trimming circuit board pins according to claim 1, characterized in that: One end of the transfer tube is detachably connected to the base.

3. The suction device for trimming circuit board pins according to claim 2, characterized in that: An external thread portion is formed on an outer peripheral wall of one end of the transfer tube, and an internal thread portion is formed on an inner peripheral wall of the other end of the suction through hole, and the external thread portion is threadedly connected to the internal thread portion.

4. The suction device for trimming circuit board pins according to claim 1, characterized in that: One end of the connecting hose is sleeved on the other end of the transfer tube, and one end of the connecting hose and the other end of the transfer tube are interference fit.

5. The suction device for trimming circuit board pins according to claim 4, characterized in that: The suction device further comprises a cable tie, which is used to tie the connecting hose to the outer peripheral wall of the adapter tube.

6. The suction device for trimming circuit board pins according to claim 1, characterized in that: An obliquely expanded hole is formed at the end portion of one end of the suction through hole, and the obliquely expanded hole covers the shearing position of the blade of the scissors.

7. The suction device for trimming circuit board pins according to claim 1, characterized in that: The preset angle is 30 degrees to 60 degrees.

8. The suction device for trimming circuit board pins according to claim 1, characterized in that: The suction device for trimming circuit board pins also includes a fastening assembly, which includes a fastener and a positioning pin; the end of the base facing away from the suction through hole is fixedly connected to the scissors body of the scissors through the fastener, and the positioning pin is used to position the base and the scissors body.

9. The suction device for trimming circuit board pins according to claim 1, characterized in that: A collection cabinet is also provided in the negative pressure box, and is used to collect discarded needles. The collection cabinet is detachably connected to the negative pressure box.

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