A fixture for printed circuit boards

Abstract

The present application provides a kind of clamp for printed circuit board, the clamp includes: first clamp component, with the receiving space for receiving chip, one end surface of the first clamp component is equipped with first cooperation part and at least one set of first suction part;Second clamp component, it is installed on printed circuit board, is configured to be detachably engaged with first clamp component so that the chip in the first clamp component and the printed circuit board form electric connection;The second clamp component includes the second cooperation part corresponding to the first cooperation part, and the second suction part corresponding to the first suction part.

Description

Technical Field

[0001] This disclosure relates to the field of medical devices, and more particularly to a clamp for printed circuit boards. Background Technology

[0002] When engineers debug integrated circuit test chips on printed circuit boards (PCBs), or when production personnel mass-produce integrated circuit test chips on PCBs, precision test sockets need to be installed on the PCBs for chip testing. However, during chip testing, problems such as oxidation of the contact points of the precision test sockets and aging of the socket housing due to high and low temperature testing can prevent normal testing, necessitating the replacement of the precision test sockets after a certain number of tests. Alternatively, multiple test sockets of the same model may need to be disassembled and reassembled at the same workstation for comparative testing. These replacement and installation operations are cumbersome and reduce the efficiency of chip testing.

[0003] The current method typically involves installing multiple sets of screws and nuts on both sides of the printed circuit board (PCB) to install the precision test socket. This method of replacing the socket is cumbersome, and in some cases, installation problems can damage the precision test socket or the PCB, leading to lost machine time, testing delays, or production postponements.

[0004] Therefore, it is necessary to provide a new type of fixture for mounting chips for related tests without cumbersome replacement and installation operations, in order to solve the above problems. Summary of the Invention

[0005] This disclosure provides a fixture for a printed circuit board, the fixture comprising: a first fixture assembly having a receiving space for receiving a chip, one end face of the first fixture assembly having a first mating portion and at least one set of first suction portions; a second fixture assembly mounted on the printed circuit board and configured to detachably engage with the first fixture assembly such that the chip in the first fixture assembly and the printed circuit board form an electrical connection; the second fixture assembly including a second mating portion corresponding to the first mating portion and a second suction portion corresponding to the first suction portion.

[0006] In some embodiments, the first mating portion is disposed in the central region of the first end face of the first clamping assembly, and the first mating portion includes a protrusion protruding outward from the first end face.

[0007] In some embodiments, the second mating portion includes a stepped portion disposed in the central region of the second clamping assembly, and the second mating portion engages with the first mating portion to match and engage the first clamping assembly and the second clamping assembly.

[0008] In some embodiments, the second mating portion includes a hollow portion extending through the central region of the second clamping assembly, and the second mating portion engages with the first mating portion to match and engage the first clamping assembly and the second clamping assembly.

[0009] In some embodiments, the second mating part has a non-centrosymmetric shape when projected onto a plane parallel to the horizontal plane.

[0010] The non-centrosymmetric shape includes any one of the following shapes, or any combination of at least two of them: trapezoid, pentagon, scalene triangle, and semicircle.

[0011] In some embodiments, the structural height of the second mating part on the printed circuit board is less than or equal to 10 mm.

[0012] In some embodiments, the number of the first adsorption portions is two sets;

[0013] The two sets of first adsorption portions are respectively disposed at the two opposite edges of the end face.

[0014] In some embodiments, one of the first adsorption portion and the second adsorption portion is a concave portion, and the other is a convex portion that matches the concave portion.

[0015] In some embodiments, the two sets of first adsorption portions have different shapes, and the two first adsorption portions located in the same set have the same shape;

[0016] The second clamping assembly is provided with a second adsorption part that corresponds one-to-one with the first adsorption part.

[0017] In some embodiments, one of the first adsorption portion and the second adsorption portion includes a magnet layer, and the other includes a metal layer.

[0018] Compared with related technologies, this disclosure has at least the following technical effects:

[0019] The fixture of the present invention forms a concave-convex mating structure through the first mating part of the first fixture assembly and the second mating part of the second fixture assembly, and forms an adsorption fastening structure through the first adsorption part and the second adsorption part. This can enhance the bonding strength of the first fixture assembly and the second fixture assembly, and make the concave-convex mating structure cooperate with the adsorption fastening structure to form an optimized concave-convex matching bonding structure. This can more effectively realize the error-proof function of the fixture, further improve the stability of the bonding structure, and effectively avoid the problem of damage to precision test sockets or printed circuit boards due to installation problems. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 An exploded perspective view of an example of a fixture for printed circuit boards provided in this disclosure;

[0022] Figure 2 To and Figure 1 A schematic diagram of another example of the orthographic projection shape of the second mating part in the second clamping assembly of the clamp in the horizontal plane;

[0023] Figure 3 To and Figure 1 A schematic diagram of another example of the orthographic projection shape of the second mating part in the second clamping assembly of the clamp in the horizontal plane;

[0024] Figure 4 To and Figure 1 A schematic diagram of another example of the orthographic projection shape of the second mating part in the second clamping assembly of the clamp in the horizontal plane;

[0025] Figure 5 An exploded perspective view of another example of a fixture for printed circuit boards provided in this disclosure. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this disclosure clearer, the disclosure will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0027] The terminology used in the embodiments of this disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure. The singular forms “a,” “the,” and “the” as used in the embodiments of this disclosure and the appended claims are also intended to include the plural forms, and “multiple” generally includes at least two unless the context clearly indicates otherwise.

[0028] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0029] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or device. Without further limitation, an element defined by the phrase "comprising one" does not exclude the presence of other identical elements in the article or device that includes said element.

[0030] In view of the above problems, this disclosure provides a fixture for a printed circuit board, the fixture comprising: a first fixture assembly having a receiving space for receiving a chip, one end face of the first fixture assembly having a first mating portion and at least one set of first suction portions; a second fixture assembly mounted on the printed circuit board and configured to detachably engage with the first fixture assembly such that the chip in the first fixture assembly and the printed circuit board form an electrical connection; the second fixture assembly includes a second mating portion corresponding to the first mating portion and a second suction portion corresponding to the first suction portion.

[0031] Using the fixture provided in this disclosure, starting with the installation method of the precision test socket, a magnetic clamping assembly (i.e., the second clamping assembly) is added to the precision test socket position on the printed circuit board. Specifically, the first clamping assembly carrying the chip is detachably matched and engaged with the second clamping assembly, so that the chip in the first clamping assembly and the printed circuit board form an electrical connection. This can effectively realize the magnetic, installation-free, and quick embedding connection between the fixture and the printed circuit board, more effectively realize the foolproof function of the fixture, further improve the stability of the joint structure, and effectively avoid the problem of damage to the precision test socket or the printed circuit board due to installation problems.

[0032] The optional embodiments of this disclosure are described in detail below with reference to the accompanying drawings.

[0033] Figure 1 An exploded perspective view of an example of a fixture for printed circuit boards provided in this disclosure.

[0034] like Figure 1 As shown, the clamp of the present invention includes a first clamp assembly 10 and a second clamp assembly 20 detachably engaged with the first clamp assembly 10.

[0035] Specifically, the first clamping assembly 10 has a receiving space for accommodating a chip. For example, the chip is specifically placed in the first clamping assembly 10 for relevant chip testing.

[0036] In this example, the first clamping assembly 10 is an integral structure, but it is not limited to this. In other examples, the first clamping assembly can also be a separate structure, such as including a main body with a receiving space and a cover that covers the main body, wherein the receiving space is used to hold the chip to be tested.

[0037] It should be noted that in this invention, the upper side of the attached drawing paper is called the upper side, the lower side of the attached drawing paper (i.e., the side opposite to the upper side) is called the lower side, the left side of the attached drawing paper is called the left side, and the right side of the attached drawing paper (i.e., the side opposite to the left side) is called the right side; the end face of the first clamping assembly 10 that is mounted with the second clamping assembly 20 in the attached drawing paper is called the first end face, and the end face opposite to the first end face is called the second end face.

[0038] exist Figure 1 In the example, the first mating part 11 is disposed in the central region of the first end face of the first clamping assembly 10, and the first mating part 11 includes a protrusion 111 protruding outward from the first end face.

[0039] Specifically, the first end face of the protrusion 111 is generally trapezoidal, more specifically, a non-isosceles trapezoid. However, it is not limited to this; in other examples, it can also be other non-centrosymmetric shapes. The above is only described as optional examples and should not be construed as limiting the invention.

[0040] By setting the protrusion of the first mating part 11 of the first clamping assembly to a non-centrally symmetrical shape and forming a concave-convex mating structure with the concave part of the second mating part 21 of the second clamping assembly, a mating structure with a foolproof function can be achieved.

[0041] Optionally, one end face (i.e., the first end face) of the first clamping assembly 10 is further provided with at least one set of first adsorption portions 13.

[0042] It should be noted that in this invention, the ab and cd sides of the first end face are used as the first side sides, and the ac and bd sides of the first end face are used as the second side sides.

[0043] Specifically, there are two sets of the first adsorption parts 13, which are located at opposite edges of the first end face. Specifically, the first set of first adsorption parts 13 located on the first side ab and the second set of first adsorption parts 13 located on the first side cd are included.

[0044] from Figure 1As can be seen from the image, two first adsorption parts 13 are provided on the first side ab and two first adsorption parts 13 are provided on the first side cd, wherein each first adsorption part 13 corresponds to a second adsorption part 23.

[0045] Preferably, one of the first adsorption portion 13 and the second adsorption portion 23 is a concave portion, and the other is a convex portion that matches the concave portion, so that each first adsorption portion 13 and its corresponding second adsorption portion 23 form an adsorption fastening structure. By setting the number, shape, and distribution of each first adsorption portion 13 and its corresponding second adsorption portion 23 relative to the first mating portion 11 and the second mating portion 21, the first clamp assembly and the second clamp assembly can form an adsorption fastening structure. This structure cooperates with the concave-convex mating structure of the first mating portion of the first clamp assembly and the second mating portion of the second clamp assembly to form an optimized concave-convex matching joint structure, which can more effectively realize the error-proof function of the clamp and further improve the stability of the joint structure.

[0046] Optionally, the two sets of first adsorption sections 13 have different shapes, and two first adsorption sections within the same set have the same shape. Figure 1 In the example, the first adsorption section 13 of the first group and the first adsorption section 13 of the second group have different shapes.

[0047] from Figure 1 As can be seen, the two first adsorption portions 13 (i.e., the first group of first adsorption portions) on the first side ab are protrusions protruding outward from the first end face of the first clamping assembly 10, and are cylindrical (or, the orthographic projection shape of the first adsorption portion 13 on the horizontal plane is circular). The two first adsorption portions 13 (i.e., the second group of first adsorption portions) on the first side cd are recesses recessed inward from the first end face of the first clamping assembly 10, and the orthographic projection shape of the first adsorption portion 13 on the first end face of the horizontal plane is pentagonal.

[0048] It should be noted that, regarding the number of the first adsorption portions, whether they are protrusions or recesses, and their shape (e.g., their orthographic projection shape on a horizontal plane or on a first end face parallel to the horizontal plane), in other examples, the number of the first adsorption portions may be three or more groups, or each group may contain three, four, etc. Furthermore, the orthographic projection shape of the first adsorption portion 13 on the horizontal plane includes the following shapes: an isosceles triangle, an isosceles pentagon, an ellipse, an isosceles hexagon, or other polygons. Additionally, other shapes of first adsorption portions may be provided on the second sides ac and bd of the first end face of the first clamping assembly, etc. The above description is merely an optional example and should not be construed as limiting the invention.

[0049] like Figure 1As shown, the fixture of the present invention further includes a second fixture assembly 20. The first fixture 20 is mounted on the printed circuit board 3 and configured to detachably engage with the first fixture assembly 10 such that the chip within the first fixture assembly 10 and the printed circuit board 3 form an electrical connection.

[0050] Specifically, the second clamping assembly 20 includes a second mating part 21 corresponding to the first mating part 11 and a second adsorption part 23 corresponding to each of the first adsorption parts 13.

[0051] exist Figure 1 In the example, the second mating part 11 includes a hollow portion penetrating the central region of the second clamping assembly 20, and the second mating part 21 engages with the first mating part 11 to match and engage the first clamping assembly 10 and the second clamping assembly 20.

[0052] Specifically, the orthographic projection of the second mating part 21 onto a plane parallel to the horizontal plane has a non-centrosymmetric shape, which includes any one of the following shapes, or any combination of at least two: trapezoid, pentagon, scalene triangle, and semicircle. In this example, the orthographic projection shape of the second mating part 21 onto a plane parallel to the horizontal plane is a trapezoid that matches the first mating part 11.

[0053] By setting the protrusion shape of the first mating part to a non-centrally symmetrical shape or setting the hollow part of the second mating part to a non-centrally symmetrical shape, a concave-convex mating structure with a foolproof function is formed, so as to eliminate the need for replacement and installation operations.

[0054] Specifically, when the second clamping assembly 20 is mounted on the printed circuit board 3, the structural height h of the second mating part 20 on the printed circuit board 3 is less than or equal to 10 mm.

[0055] Preferably, the structural height h (i.e., the structural height of the hollow part) is less than or equal to 8 mm.

[0056] Furthermore, the second clamp assembly 20 (specifically the first end face) is provided with two sets of second adsorption parts 23 (specifically the first set of second adsorption parts and the second set of second adsorption parts) corresponding to the two sets of first adsorption parts 23. Specifically, the second adsorption parts 23 are provided in a one-to-one correspondence with the first adsorption parts 13.

[0057] More specifically, on the side ef of the second clamping assembly 20, there are two second adsorption parts 23 (i.e., the first group of second adsorption parts) that cooperate with the first group of first adsorption parts 13 (i.e., the two first adsorption parts 13 on the first side ab) of the first clamping assembly 10 at the corresponding engagement position. These two second adsorption parts 23 are recesses corresponding to the first group of first adsorption parts 13, specifically recesses that are recessed inward from the first end face of the second clamping assembly 20, and match and engage with the protrusion of the first adsorption part 13 at the unique engagement position. The recess is approximately cylindrical, that is, the orthographic projection shape of the two second adsorption parts 23 on the horizontal plane of the second clamping assembly 20 (or on the first end face parallel to the horizontal plane) is circular.

[0058] Furthermore, on the side gk of the second clamping assembly 20, there are two second adsorption parts 23 (i.e., the second group of second adsorption parts) that cooperate with the second group of first adsorption parts 13 (i.e., the two first adsorption parts 13 on the first side cd) of the first clamping assembly 10 at the corresponding engagement position. These two second adsorption parts 23 are protrusions corresponding to the above-mentioned second group of first adsorption parts 13, specifically protrusions that protrude outward from the second end face of the second clamping assembly 20, and match and engage with the recess of the first adsorption part 13 at the unique engagement position to form an adsorption fastening structure. The orthographic projection shape of the two second adsorption parts 23 on the horizontal plane (or the first end face) of the second clamping assembly 20 is pentagonal.

[0059] Furthermore, one of the first adsorption portion 13 and the second adsorption portion 23 includes a magnet layer, and the other includes a metal layer.

[0060] In this example, the first adsorption part 13 includes a magnet layer, and the second adsorption part 23 at the corresponding engagement position includes a metal layer. By providing a metal layer or a magnet layer for the first adsorption part and the corresponding engagement second adsorption part, and forming an adsorption fastening structure by setting an uneven shape, the engagement strength of the first clamp assembly and the second clamp assembly can be enhanced. It can also cooperate with the uneven engagement structure of the first mating part of the first clamp assembly and the second mating part of the second clamp assembly to form an optimized uneven matching engagement structure, which can more effectively realize the error prevention function of the clamp and further improve the stability of the engagement structure.

[0061] It should be noted that the number of the second adsorption portions, whether they are protrusions or recesses, and their shape (e.g., the orthographic projection shape on a horizontal plane or a first end face parallel to the horizontal plane) all correspond to the number of the first adsorption portions, whether they are protrusions or recesses, and their shape, forming a corresponding concave-convex fit. The above is only described as an optional example and should not be construed as limiting the present invention.

[0062] Optionally, the orthographic projection shape of the second mating part 21 of the second clamping assembly 20 on the horizontal plane is one of the following shapes or any combination of two shapes: trapezoid, pentagon, scalene triangle, semicircle.

[0063] In another embodiment, such as Figure 2 The second mating part 21 of the second clamping assembly 20 has a pentagonal and semi-circular orthographic shape when projected onto the horizontal plane.

[0064] In yet another implementation, such as Figure 3 As shown, the orthographic projection shape of the second mating part 21 of the second clamping assembly 20 on the horizontal plane is a combination of a pentagon and a semicircle.

[0065] In yet another implementation, such as Figure 4 As shown, the orthographic projection shape of the second mating part 21 of the second clamping assembly 20 on the horizontal plane is a combination of a trapezoid and an isosceles triangle.

[0066] It should be noted that the above is only an optional example and should not be construed as a limitation of the present invention. In other embodiments, it can also be a combination of a pentagon and an scalene triangle, etc. As long as the orthographic projection of the second mating part on a plane parallel to the horizontal plane (or printed circuit board) has a non-centrosymmetric shape, that is, the orthographic projection shape is a non-centrosymmetric shape.

[0067] Furthermore, the first end face of the first clamping assembly 10 is provided with an electrical connection area, and a first electrical connector 4, such as a pin contact point, is provided in this electrical connection area. Correspondingly, the first end face of the second clamping assembly 20 is provided with a second electrical connector 5, such as a pin contact point, corresponding to the position of the first electrical connector 4. Thus, when the first mating part of the first clamping assembly and the second mating part of the second clamping assembly are matched and engaged, the first and second electrical connectors are electrically connected to form an electrical connection between the chip in the first clamping assembly and the printed circuit board.

[0068] Figure 5 An exploded perspective view of another example of a fixture for printed circuit boards provided in this disclosure.

[0069] exist Figure 5 In the example shown, with Figure 1 The difference in the example shown is that the second mating part 21 includes a stepped part disposed in the central region of the second clamping assembly 20.

[0070] Specifically, the stepped portion is formed by recessing inward from the first end face of the second clamping assembly 20, and the recessed depth h1 is 4mm to 8mm.

[0071] Furthermore, the second mating part 21 includes a hollow part located closer to the center than the stepped part, and the hollow part is a through hole penetrating the central region of the second mating part 21.

[0072] Accordingly, the first mating part 11 of the first clamping assembly 10 includes a step part corresponding to the step part. The step part is formed by protruding outward from the first end face of the first clamping assembly 10. The length h2 of the protrusion is equal to the recessed depth h1 of the step part of the second clamping assembly 20, and is 4mm to 8mm.

[0073] By having the second mating part engage with the first mating part in a concave-convex manner, the first clamping assembly and the second clamping assembly can be matched and joined together, which can more effectively realize the error-proof function of the clamp and further improve the stability of the joint structure.

[0074] It should be noted that, due to Figure 5 The clamp in the example and Figure 1 The fixtures in the examples are largely the same, therefore, descriptions of their common parts are omitted.

[0075] Compared with the prior art, the clamp of the present invention forms a concave-convex mating structure through the first mating part of the first clamping assembly and the second mating part of the second clamping assembly, and forms an adsorption fastening structure through the first adsorption part and the second adsorption part. This can enhance the joint strength of the first clamping assembly and the second clamping assembly, and make the concave-convex mating structure cooperate with the adsorption fastening structure to form an optimized concave-convex matching joint structure. This can more effectively realize the error-proof function of the clamp and further improve the stability of the joint structure.

[0076] Those skilled in the art will understand that the injection device 40 in the foregoing embodiments is explained using a dual-syringe as an example, and in other embodiments, the injection device may be other syringes.

[0077] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the systems or apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the descriptions are relatively simple, and relevant parts can be referred to the method section.

[0078] The above embodiments are only used to illustrate the technical solutions of this disclosure, and are not intended to limit it. Although this disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this disclosure.

Claims

1. A clamp for printed circuit boards, characterized in that, The clamp includes: A first clamping assembly has a receiving space for receiving a chip, and one end face of the first clamping assembly is provided with a first mating part and at least one set of first adsorption parts; A second clamping assembly, mounted on a printed circuit board, is configured to detachably engage with a first clamping assembly such that a chip within the first clamping assembly and the printed circuit board form an electrical connection. The second clamping assembly includes a second mating portion corresponding to the first mating portion and a second adsorption portion corresponding to the first adsorption portion. The first mating part and the second mating part are configured to form a concave-convex mating structure, and the first mating part and the second mating part have a non-centrally symmetrical shape when projected onto a plane parallel to the horizontal plane.

2. The clamp according to claim 1, characterized in that, The first mating part is disposed in the central region of the first end face of the first clamping assembly, and the first mating part includes a protrusion protruding outward from the first end face.

3. The clamp according to claim 2, characterized in that, The second mating part includes a stepped portion disposed in the central region of the second clamping assembly. The second mating part engages with the first mating part in a concave-convex manner so that the first clamping assembly and the second clamping assembly match and engage.

4. The clamp according to claim 2, characterized in that, The second mating portion includes a hollow portion that extends through the central region of the second clamping assembly. The second mating portion engages with the first mating portion in a concave-convex manner so that the first clamping assembly and the second clamping assembly match and engage.

5. The clamp according to claim 1 or 2, characterized in that, The non-centrosymmetric shape includes any one of the following shapes, or any combination of at least two of them: Trapezoids, pentagons, scalene triangles, and semicircles.

6. The clamp according to any one of claims 1, 3, and 4, characterized in that, The structural height of the second mating part on the printed circuit board is less than or equal to 10 mm.

7. The clamp according to claim 1, characterized in that, The number of the first adsorption units is two; The two sets of first adsorption portions are respectively disposed at the two opposite edges of the end face.

8. The clamp according to claim 7, characterized in that, One of the first adsorption portion and the second adsorption portion is a concave portion, and the other is a convex portion that matches the concave portion.

9. The clamp according to claim 7, characterized in that, The two sets of first adsorption sections have different shapes, and the two first adsorption sections located in the same set have the same shape. The second clamping assembly is provided with a second adsorption part that corresponds one-to-one with the first adsorption part.

10. The clamp according to claim 1, characterized in that, One of the first adsorption part and the second adsorption part includes a magnet layer, and the other includes a metal layer.

Images