A shrapnel needle module for testing cylindrical products

Abstract

The present invention discloses a shrapnel needle module for testing cylindrical products, which relates to the technical field of circuit testing, and includes a needle card mounting base; and a plurality of shrapnel needle components fixed on the needle card mounting base, and each of the shrapnel needle components is circumferentially distributed. The shrapnel needle component includes a plurality of shrapnel needles, and each of the shrapnel needles presses and contacts the test post of the product by means of clamping. The shrapnel needle includes an elastic pressing strip at the end, and the elastic pressing strip has a pressing convex block arranged radially inward to press and contact the test post of the product. According to the above technical solution, by arranging a plurality of shrapnel needle components on the needle card mounting base, when the product is clamped to the needle card mounting base, the test post contacts the pressing convex block, and then the elastic pressing strip deforms. The elastically deformed elastic pressing strip can apply pressure to the test post. The shrapnel needle presses and contacts the test post of the product by means of clamping, and the pressing convex block contacts the Pad point of the test post, so as to realize stable testing after the product is clamped.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit testing, and particularly relates to a shrapnel pin module for testing cylindrical products. Background Art

[0002] With the rapid development of electronic technology, the output of printed circuit boards (PCBs) widely used in various electronic devices has increased significantly. Technicians need to quickly determine short-circuit, open-circuit faults on their backplanes or locate over-standard resistances. And the PCB test fixture is an important device in the test link of the PCB production process. It mainly connects the solder joints on the back of the PCB through metal probes. When the PCB is powered on, typical values such as voltage values and current values of the test circuit are obtained, so as to observe whether the tested circuit is conducting normally. The commonly used test method is to use conventional probes to contact the product to be tested, so as to conduct.

[0003] Currently, the probes on the market are mainly for testing flat PCBs, that is, the most common double-headed probes. A pin point is led out on a PCB, and then the double-headed probe is used to pierce the TP point, and then conduct, so as to obtain typical values such as voltage values and current values of the test circuit, so as to observe whether the tested circuit is conducting normally. However, when encountering some relatively special-shaped products, unlike the TP points of traditional PCBs which are on the TOP layer or the BOT layer, but on the curved surface of a cylinder, at this time, the traditional probes cannot stably pierce the TP point. Summary of the Invention

[0004] The present invention aims to solve at least one of the above technical problems in the prior art to some extent. For this reason, an embodiment of the present invention provides a shrapnel pin module for testing cylindrical products, which can stably test cylindrical products.

[0005] The shrapnel pin module for testing cylindrical products according to an embodiment of the present invention includes a needle card mounting base; and a plurality of shrapnel pin components fixed on the needle card mounting base. Each of the shrapnel pin components is circumferentially distributed. The shrapnel pin component includes a plurality of shrapnel pins. Each of the shrapnel pins presses and contacts the test column of the product by a clamping method. The shrapnel pin includes an elastic pressing strip at the end. The elastic pressing strip has a pressing convex block radially inwardly arranged to press and contact the test column of the product.

[0006] In an optional or preferred embodiment, the elastic pressing strip is formed by being bent multiple times, so as to have elasticity, and the elastic pressing strip has an elastic deformation space for elastic deformation.

[0007] In an optional or preferred embodiment, the pressing convex block tapers towards the outside of the end of the needle card mounting base, so as to form a test column guiding insertion port that can be elastically expanded and elastically tightened.

[0008] In an alternative or preferred embodiment, the pressing bump is triangular, and the end corners of the pressing bump are provided with arcs.

[0009] In an alternative or preferred embodiment, each of the spring probe pins is surface gold-plated.

[0010] In an alternative or preferred embodiment, the needle card mounting base includes a spring probe pin card for mounting the spring probe pins. The spring probe pin card is provided with a slot for the spring probe pins to be inserted. The pressing bump of the elastic pressing strip extends out from the slot for pressing against the test posts of the product.

[0011] In an alternative or preferred embodiment, the needle card mounting base further includes a needle card mounting block and a needle card restraint block that are fixedly connected to each other. The spring probe pin card is mounted between the needle card mounting block and the needle card restraint block. The needle card restraint block is used for positioning the product. The needle card restraint block is of an annular structure, and the needle card restraint block is provided with a slot for the elastic pressing strip to pass through.

[0012] In an alternative or preferred embodiment, the spring probe pin module further includes a connector. The needle card mounting base is mounted on the connector through a plurality of fasteners. The connector is provided with a plurality of stud bolts. The fasteners are sequentially passed through the needle card mounting block and the needle card restraint block and then connected to the stud bolts to fix the needle card mounting base on the connector and fixedly connect the needle card mounting block and the needle card restraint block to each other.

[0013] In an alternative or preferred embodiment, a plurality of pin dowels are provided between the spring probe pin card and the needle card mounting block to position the spring probe pin card.

[0014] In an alternative or preferred embodiment, the needle card mounting base is further provided with a plurality of first double-headed probes and a plurality of second double-headed probes.

[0015] Based on the above technical solutions, the embodiments of the present invention have at least the following beneficial effects: Through the above technical solutions, by providing a plurality of spring probe pin assemblies on the needle card mounting base, when the product is clamped to the needle card mounting base, the test posts contact the pressing bumps, and then the elastic pressing strip deforms. The elastically deformed elastic pressing strip can apply pressure to the test posts. The spring probe pins press against the test posts of the product in a clamping manner, and the pressing bumps contact the Pad points of the test posts, so as to realize stable testing after clamping the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below in conjunction with the drawings and embodiments;

[0017] Figures 1 to 3 is a schematic structural diagram of the product;

[0018] Figure 4 is a perspective view of an embodiment of the present invention, in which the product is also shown;

[0019] Figure 5 is an exploded Figure 1 ;

[0020] Figure 6 is an exploded Figure 2 ;

[0021] Figure 7 is a perspective view of the elastic needle in an embodiment of the present invention;

[0022] Figure 8 is a schematic structural diagram of the elastic needle after deformation in an embodiment of the present invention. Detailed Embodiments

[0023] This part will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the drawings. The role of the drawings is to supplement the description in the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present invention. However, it should not be construed as a limitation on the protection scope of the present invention.

[0024] In the description of the present invention, it should be understood that with regard to the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc., is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the present invention.

[0025] In the description of the present invention, the meaning of several is one or more, the meaning of multiple is two or more. Understandings such as greater than, less than, exceeding, etc. do not include the present number, and understandings such as above, below, within, etc. include the present number. If there is a description of first and second, it is only for the purpose of distinguishing technical features and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0026] In the description of the present invention, unless otherwise clearly defined, words such as setting, installing, connecting, etc. should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0027] Refer to Figures 1 to 3, product 100 was presented. Product 100 has a test post 110, and it is necessary to connect to the Pad point 111 on the outer peripheral surface of the test post 110 to obtain typical values such as the voltage value and current value of the test circuit. For this type of product, ordinary probes cannot reach the pad point 111 that is both embedded and attached to the peripheral surface of the test post.

[0028] Referring to Figures 4 to 8 , a shrapnel needle module for testing cylindrical products was presented. The shrapnel needle module 200 for testing cylindrical products includes a needle card mounting base and a plurality of shrapnel needle components 240 fixed on the needle card mounting base.

[0029] Each shrapnel needle component 240 is circumferentially distributed. The shrapnel needle component 240 includes several shrapnel needles 241. Each shrapnel needle 241 presses against the test post 110 of the product 100 by means of clamping. The shrapnel needle 241 includes an elastic pressing strip 242 at the end. The elastic pressing strip 242 has a pressing convex block 243 arranged radially inward to press against the test post 110 of the product 100.

[0030] It can be understood that by arranging a plurality of shrapnel needle components 240 on the needle card mounting base, referring to Figure 4 , when the product 100 is clamped to the needle card mounting base 240, the test post 110 of the product 100 will first contact the pressing convex block 243 of the elastic pressing strip 242, and then the elastic pressing strip 242 will bend radially outward and deform. The elastically deformed elastic pressing strip 242 can apply pressure to the test post 110. For example, in the working state of the shrapnel needle 241, the compression amount of the elastic pressing strip 242 is 0.5 mm, and it is subjected to a force of 0.15 N. According to the interaction of forces, it can be judged that the normal force of the elastic pressing strip 242 of each shrapnel needle 241 on the test post 110 of the product 100 is 0.15 N. Therefore, a relatively stable test state can be achieved. Each shrapnel needle 241 is circumferentially distributed and presses against the test post 110 of the product 100 by means of clamping. Among them, the pressing convex block 243 contacts the Pad point 111 of the test post 110, so as to achieve stable testing after the product is clamped.

[0031] Those skilled in the art know that in such products with complex shapes, there are often many tests to be done. However, through the shrapnel needle module 200 for testing cylindrical products, impedance testing can be performed on the product, and the test is carried out by contacting the Pad point 111 of the test post 110 through the elastic needle 241. By testing the impedance, it can be checked whether the product has assembly defects, circuit defects, whether there are open circuits or short circuits on the circuit, and whether the impedance on the signal line is consistent. If the difference is large, it may affect the communication quality. In this way, the test process can be greatly simplified.

[0032] Referring to Figure 7 and Figure 8, specifically, the elastic strip 242 is formed by bending multiple times, thus having elasticity, and the elastic strip 242 has an elastic deformation space 244 for elastic deformation. Among them, the middle of the elastic strip 242 can be designed with a hollow, which can increase its elastic deformation amount.

[0033] The pressing bump 243 tapers towards the outer side of the end of the needle card mounting base, thereby forming a test post guiding insertion port 201 that can be elastically expanded and elastically tightened. When the product 100 is clipped onto the needle card mounting base, the test post 110 will first contact the tapered part of the pressing bump 243, and the elastic strip 242 will start to gradually deform until the product 100 is clipped in place. At this time, the state of the spring needle 241 is as Figure 8 shown. Preferably, the pressing bump 243 is triangular, and the end corners of the pressing bump 243 are provided with rounded arcs, so that the elastic sheet will not scratch the outer shape of the product.

[0034] Each spring needle 241 is surface gold-plated. After the surface gold-plating process treatment, the impedance of the elastic sheet is lower than or equal to 100 milliohms, having good electrical performance.

[0035] In some of the embodiments, the needle card mounting base includes a spring needle card 231 for mounting the spring needle 241. The spring needle card 231 is provided with a slot 232 for the spring needle 241 to be inserted. The pressing bump 243 of the elastic strip 242 protrudes from the slot 232 for pressing the test post 110 of the product 100. Further, the needle card mounting base further includes a needle card mounting block 221 and a needle card restraint block 222 that are fixedly connected to each other. The spring needle card 231 is mounted between the needle card mounting block 221 and the needle card restraint block 222. The needle card restraint block 222 is of an annular structure, and the needle card restraint block 222 is provided with a slot for the elastic strip 242 to pass through. In addition, the needle card restraint block 222 is also used for positioning the product 100, and the product 100 is clipped onto the needle card restraint block 222 for testing.

[0036] The spring needle module further includes a connector 211. The connector 211 is mounted with a PCB board. The needle card mounting base is mounted on the connector 211 through a plurality of fasteners. After installation, the bottom of the spring needle 241 is connected to the PCB board.

[0037] Specifically, the connector 211 is provided with a plurality of studs 212. The fasteners pass through the needle card mounting block 221 and the needle card restraint block 222 in sequence and are then connected to the studs 212 to fix the needle card mounting base on the connector 211 and fix the needle card mounting block 221 and the needle card restraint block 222 to each other. A plurality of pins 261 are provided between the spring needle card 231 and the needle card mounting block 221 to position the spring needle card 231.

[0038] The needle card mounting base is also provided with a plurality of first double-headed probes 251 and a plurality of second double-headed probes 252. The first double-headed probes 251 and the second double-headed probes 252 are used to test the ordinary signals and GND of the product.

[0039] The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made without departing from the gist of the present invention within the scope of knowledge possessed by those of ordinary skill in the art.

Claims

1. A shrapnel needle module for testing cylindrical products, characterized in that: It includes a needle card mounting base; and a plurality of shrapnel needle components fixed on the needle card mounting base, each of the shrapnel needle components is circumferentially distributed, each of the shrapnel needle components includes a number of shrapnel needles, each of the shrapnel needles presses against the test column of the product by means of clamping, and the shrapnel needle includes an elastic pressing strip at the end, and the elastic pressing strip has a pressing convex block arranged radially inward to press against the test column of the product; The needle card mounting base includes a shrapnel needle card for mounting the shrapnel needle, and the shrapnel needle card is provided with a slot for the shrapnel needle to be inserted, and the pressing convex block of the elastic pressing strip extends out of the slot for pressing against the test column of the product; The needle card mounting base further includes a needle card mounting block and a needle card restraint block that are fixedly connected to each other, the shrapnel needle card is mounted between the needle card mounting block and the needle card restraint block, the needle card restraint block is used for product positioning, the needle card restraint block is an annular structure, and the needle card restraint block is provided with a slot for the elastic pressing strip to pass through.

2. The shrapnel needle module for testing cylindrical products according to claim 1, characterized in that: The elastic pressing strip is formed by being bent multiple times, so as to have elasticity, and the elastic pressing strip has an elastic deformation space for elastic deformation.

3. The shrapnel needle module for testing cylindrical products according to claim 2, characterized in that: The pressing convex block tapers towards the outside of the end of the needle card mounting base, so as to form a test column guiding insertion port that can be elastically expanded and elastically tightened.

4. The shrapnel needle module for testing cylindrical products according to claim 3, characterized in that: The pressing convex block is triangular, and the end angle of the pressing convex block is provided with an arc.

5. The shrapnel needle module for testing cylindrical products according to claim 1, characterized in that: Each of the shrapnel needles is surface gold-plated.

6. The shrapnel needle module for testing cylindrical products according to claim 1, characterized in that: The shrapnel needle module further includes a connector, the needle card mounting base is mounted on the connector by a number of fasteners, the connector is provided with a number of stud bolts, and the fasteners pass through the needle card mounting block and the needle card restraint block in sequence and are connected to the stud bolts to fix the needle card mounting base on the connector and fix the needle card mounting block and the needle card restraint block to each other.

7. The shrapnel needle module for testing cylindrical products according to claim 6, characterized in that: A number of pin pins are arranged between the shrapnel needle card and the needle card mounting block to position the shrapnel needle card.

8. The shrapnel needle module for testing cylindrical products according to claim 1, characterized in that: The needle card mounting base is further provided with a number of first double-headed probes and a number of second double-headed probes.

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