Positioning needle

Abstract

The utility model provides a positioning pin, and relates to the technical field of circuit board maintenance and positioning. A positioning needle comprises a positioning rod; the first spring is arranged on the positioning rod in a winding manner; the needle sleeve is arranged on the positioning rod in a sliding mode, and the first spring is located in the needle sleeve; the positioning device further comprises a polyurethane gasket, and the bottom of the positioning rod is fixedly connected with the polyurethane gasket. The pressing device drives the needle sleeve to move downwards, the needle sleeve drives the positioning rod to move downwards, so that the polyurethane gasket is pressed on the PCB, the polyurethane gasket replaces an existing hard contact face of the positioning rod, and the effect of preventing the PCB from being damaged is achieved.

Description

Technical Field

[0001] The utility model provides a positioning pin, which relates to the technical field of circuit board repair and positioning. Background Art

[0002] PCB board, also known as printed circuit board, is an important electronic component. During the production process of PCB board, it needs to be tested to check whether there is short circuit leakage and other phenomena on the PCB board.

[0003] When the PCB board is being tested, it needs to be positioned. Generally, four holes are punched at the four corners of the PCB board for positioning, and the PCB board needs to be positioned by aligning the four positioning holes. During the positioning and pressing process of the circuit board, there is friction between the positioning pins and the surface of the components, which can easily scratch the components and cause damage to the components.

[0004] Therefore, it is necessary to provide a positioning pin that can avoid scratching components. Utility Model Content

[0005] In order to overcome the disadvantages of existing circuit boards that, during the positioning and pressing process, there is friction between the positioning pins and the surfaces of components, which easily scratches the components and causes damage to the components, the utility model provides a positioning pin that avoids scratching the components.

[0006] In order to achieve the above-mentioned purpose, an embodiment of the utility model provides the following technical solutions: a positioning needle, comprising: a positioning rod; a first spring, the first spring is wound around the positioning rod; and a needle sleeve, the needle sleeve is slidably arranged on the positioning rod, and the first spring is located inside the needle sleeve; and also includes: a polyurethane gasket, the polyurethane gasket is fixedly connected to the bottom of the positioning rod.

[0007] Further description, it also includes: a threaded portion, the threaded portion is arranged on the top of the positioning rod; and a nut, the nut is threadedly arranged on the threaded portion, and the nut is located above the needle sleeve.

[0008] Further description, it also includes: a guide bar, a plurality of the guide bars fixedly connected to the positioning rod, a plurality of guide grooves are opened on the needle sleeve, and the needle sleeve slides along the guide bar through the guide grooves.

[0009] Further description, it also includes: a fixed plate, the fixed plate installed on both sides of the needle sleeve; and a clamping block, the clamping block is slidably arranged in the fixed plate; a second spring, two of the second springs are fixedly connected between the clamping block and the fixed plate; a clamping rod, the clamping rod is slidably arranged on the fixed plate, the second spring pushes the clamping block to clamp with the clamping rod, and the clamping rod is installed on the downward pressing device of the peripheral device.

[0010] It is further explained that a metal gasket is sleeved on the threaded portion of the positioning rod, and the metal gasket is located between the nut and the needle sleeve.

[0011] It is further explained that a fixing ring is sleeved on the positioning rod and the polyurethane gasket.

[0012] It is further explained that a plurality of sawtooth grooves are formed on one side of the clamping rod close to the clamping block, and the clamping rod is clamped with the clamping block through the sawtooth grooves.

[0013] Compared with the prior art, the positioning needle provided by the embodiment of the utility model has the following advantages: 1. The needle sleeve is driven to move downward by the pressing device, and the needle sleeve drives the positioning rod to move downward, so that the polyurethane gasket is pressed on the PCB board. The polyurethane gasket replaces the existing hard contact surface of the positioning rod, thereby preventing the PCB board from being damaged.

[0014] 2. The guide strip on the positioning rod is slidably matched with the guide groove on the needle sleeve to limit the position of the needle sleeve to prevent the needle sleeve from rotating on the positioning rod, so as to prevent the needle sleeve from twisting the first spring through friction and causing deformation and damage, thereby preventing the first spring from being damaged.

[0015] 3. Pull the card block to slide along the fixed plate to the side close to the positioning rod. At this time, the second spring is compressed and deformed. Then the fixed plate is slid upward and inserted into the card rod. After the card block is released, the second spring pushes the card block to slide and reset, so that the card block is engaged with the card rod, thereby achieving the effect of quickly fixing the needle sleeve on the pressing device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0017] Figure 2 It is a schematic diagram of the three-dimensional explosion structure of the utility model.

[0018] Figure 3 The utility model is a three-dimensional cross-sectional structural schematic diagram of the positioning rod, the nut and the guide strip.

[0019] Figure 4 It is a three-dimensional structural schematic diagram of the needle sleeve, the fixing plate and the clamping rod of the utility model.

[0020] Figure 5 It is a three-dimensional cross-sectional structural schematic diagram of the clamping rod, the clamping block and the second spring of the utility model.

[0021] In the above figures: 1: positioning rod, 101: threaded portion, 2: first spring, 3: needle sleeve, 4: nut, 5: polyurethane gasket, 6: guide strip, 7: guide groove, 8: fixing plate, 9: clamping rod, 10: clamping block, 11: second spring, 12: metal gasket, 13: fixing ring. DETAILED DESCRIPTION

[0022] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0023] Embodiment 1: A positioning needle, see Figure 1-Figure 3 As shown, it includes: a positioning rod 1, a first spring 2 and a needle sleeve 3, the first spring 2 is wound around the positioning rod 1, the needle sleeve 3 for protecting the first spring 2 is slidably arranged on the positioning rod 1, the first spring 2 is located inside the needle sleeve 3, and also includes: a polyurethane gasket 5, the bottom of the positioning rod 1 is fixedly connected to the polyurethane gasket 5 by bonding.

[0024] The top of the positioning rod 1 is provided with a threaded portion 101 , and a nut 4 is threadedly provided on the threaded portion 101 , and the nut 4 is located above the needle sleeve 3 .

[0025] When the PCB board needs to be positioned, the needle sleeve 3 is driven downward by the pressing device, and the needle sleeve 3 drives the positioning rod 1 to move downward so that the polyurethane gasket 5 is pressed on the PCB board. As the pressing device drives the needle sleeve 3 to continue to press downward, the needle sleeve 3 slides downward along the positioning rod 1. At this time, the first spring 2 is compressed and deformed by force, and the first spring 2 applies downward pressure to the positioning rod 1 to fix the PCB board. The PCB board is positioned and fixed by multiple positioning rods 1; the needle sleeve 3 is limited by the nut 4, and the nut 4 is used instead of the existing retaining spring limiting method. The installation and use are more firm, and the needle sleeve 3 and the positioning rod 1 are prevented from slipping.

[0026] Example 2: Based on Example 1, refer to Figure 3 As shown, it also includes two guide strips 6 fixedly connected to the positioning rod 1 in the circumferential direction by welding. Two guide grooves 7 are provided on the needle sleeve 3. The needle sleeve 3 slides along the guide strips 6 through the guide grooves 7.

[0027] When the needle sleeve 3 slides along the positioning rod 1, the guide strip 6 on the positioning rod 1 and the guide groove 7 on the needle sleeve 3 are slidably matched to limit the needle sleeve 3, thereby preventing the needle sleeve 3 from rotating on the positioning rod 1, so as to prevent the needle sleeve 3 from twisting the first spring 2 due to friction and causing deformation and damage.

[0028] See also Figure 4 and Figure 5 As shown, it also includes a fixing plate 8 installed on both sides of the needle sleeve 3 by welding, a clamping block 10 is arranged in a transverse sliding manner in the fixing plate 8, and two second springs 11 are fixedly connected between the clamping block 10 and the fixing plate 8 by welding, a clamping rod 9 is arranged on the fixing plate 8 in a vertical sliding manner, and a plurality of serrated grooves are provided on a side of the clamping rod 9 close to the clamping block 10, the clamping rod 9 is clamped with the clamping block 10 through the serrated grooves, the second spring 11 pushes the clamping block 10 to clamp with the serrated groove on the clamping rod 9, and the clamping rod 9 is installed on the external pressing device by bolt connection.

[0029] When the needle sleeve 3 needs to be quickly installed on the pressing device, first pull the clamping block 10 to slide along the fixing plate 8 to the side close to the positioning rod 1. At this time, the second spring 11 is compressed and deformed by force, and then the fixing plate 8 is slid upward and inserted into the clamping rod 9, so that the clamping rod 9 is inserted into the fixing plate 8. Then the clamping block 10 is released. At this time, the second spring 11 pushes the clamping block 10 to slide and reset, so that the clamping block 10 is clamped with the clamping rod 9, so that the needle sleeve 3 is fixed on the pressing device.

[0030] See also Figure 3 As shown, a metal gasket 12 is sleeved on the threaded portion 101 of the positioning rod 1, and the metal gasket 12 is located between the nut 4 and the needle sleeve 3; a fixing ring 13 is sleeved on the positioning rod 1 and the polyurethane gasket 5 by bonding.

[0031] The metal gasket 12 can reduce the wear between the needle sleeve 3 and the nut 4; the fixing ring 13 can make the connection between the positioning rod 1 and the polyurethane gasket 5 more stable.

[0032] 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, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A positioning needle, comprising: Positioning rod (1); A first spring (2), the first spring (2) being wound around the positioning rod (1); and a needle sleeve (3), wherein the needle sleeve (3) is slidably arranged on the positioning rod (1), and the first spring (2) is located inside the needle sleeve (3); Its characteristics are: also include: A polyurethane gasket (5) is fixedly connected to the bottom of the positioning rod (1).

2. A positioning needle according to claim 1, characterized in that: include: A threaded portion (101), the top of the positioning rod (1) being provided with the threaded portion (101); and a nut (4), wherein the nut (4) is threadedly arranged on the threaded portion (101), and the nut (4) is located above the needle sleeve (3).

3. A positioning needle according to claim 1, characterized in that: include: A guide bar (6), a plurality of the guide bars (6) fixedly connected to the positioning rod (1), a plurality of guide grooves (7) being provided on the needle sleeve (3), and the needle sleeve (3) sliding along the guide bar (6) through the guide grooves (7).

4. A positioning needle according to claim 1, characterized in that: include: A fixing plate (8), the fixing plate (8) being mounted on both sides of the needle sleeve (3); and a clamping block (10), wherein the clamping block (10) is slidably arranged in the fixing plate (8); A second spring (11), wherein two second springs (11) are fixedly connected between the clamping block (10) and the fixing plate (8); A clamping rod (9) is slidably arranged on the fixing plate (8), the second spring (11) pushes the clamping block (10) to clamp with the clamping rod (9), and the clamping rod (9) is installed on a downward pressing device of an external device.

5. A positioning needle according to claim 2, characterized in that: A metal gasket (12) is sleeved on the threaded portion (101) of the positioning rod (1), and the metal gasket (12) is located between the nut (4) and the needle sleeve (3).

6. A positioning needle according to claim 1, characterized in that: A fixing ring (13) is sleeved on the positioning rod (1) and the polyurethane gasket (5).

7. A positioning needle according to claim 4, characterized in that: A plurality of sawtooth grooves are formed on one side of the clamping rod (9) close to the clamping block (10), and the clamping rod (9) is clamped with the clamping block (10) via the sawtooth grooves.

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