Mounting device for printed circuit board

Abstract

The present invention provides a mounting device for a printed circuit board, the structure of which includes an extension portion; a first clamping portion, which is arranged on both sides of the extension portion in a first direction and is used to clamp the printed circuit board in the first direction; a second clamping portion, which is arranged on both sides of the extension portion in a second direction perpendicular to the first direction and is used to clamp the printed circuit board in the second direction; and a telescopic portion, which connects the second clamping portion and the extension portion. The mounting device for a printed circuit board can solve the problem of how to install printed circuit boards of various sizes.

Description

Technical Field

[0001] The present application relates to the technical field of printed circuit board installation, and in particular to an installation device for a printed circuit board. Background Art

[0002] Printed circuit boards, also known as printed circuit boards, are providers of electrical connections for electronic components and are also supports for electronic components. They are widely used in the field of electronic products.

[0003] In the process of using printed circuit boards, how to install them has become the primary issue. For example, when installing printed circuit boards in an electric control box, since printed circuit boards come in a variety of sizes, it is necessary to replace installation fixtures of different sizes to match the size of the printed circuit boards. Replacing installation fixtures is time-consuming and labor-intensive, and the cost of multiple installation fixtures is high. Summary of the invention

[0004] In view of this, the purpose of the present application is to provide a mounting device for a printed circuit board, so as to solve the problem of how to mount printed circuit boards of various sizes.

[0005] According to the present invention, there is provided an installation device for a printed circuit board, wherein the installation device for a printed circuit board comprises: an extension portion; a first clamping portion, arranged on both sides of the extension portion in a first direction, for clamping the printed circuit board in the first direction; a second clamping portion, arranged on both sides of the extension portion in a second direction perpendicular to the first direction, for clamping the printed circuit board in the second direction; and a telescopic portion, connecting the second clamping portion and the extension portion.

[0006] Preferably, the extension part comprises: an extension unit, the extension part is composed of one extension unit or a plurality of extension units connected to each other in the first direction; and a connection part, the connection parts are arranged on both sides of the extension unit in the first direction.

[0007] Preferably, the first clamping portion includes: a first clamping component disposed on one side of the extension portion in the first direction; and a second clamping component disposed on the other side of the extension portion in the first direction.

[0008] Preferably, the connecting portion includes: a first connecting component, which is arranged on one side of the expansion unit in the first direction; and a second connecting component, which is arranged on the other side of the expansion unit in the first direction and is used to cooperate and connect with the first connecting component; the first connecting component or the second connecting component is provided on one side of the first clamping component and the second clamping component that is connected to the expansion unit.

[0009] Preferably, the expansion portion further includes a first travel spring for connecting the expansion unit with the first clamping component and connecting the expansion unit with the second clamping component.

[0010] Preferably, the second clamping portion includes: first movable claws arranged on both sides of the expansion unit in the second direction; and second movable claws arranged on both sides of the first clamping member and the second clamping member in the second direction.

[0011] Preferably, the telescopic part includes: a second travel spring, used to connect the first movable claw with the expansion unit and used to connect the second movable claw with the first clamping part and the second clamping part; a spring groove, the second travel spring is installed in the spring groove, the spring groove is connected to the first movable claw or the second movable claw; and a cover plate, the spring groove is provided with the cover plate.

[0012] Preferably, both sides of the expansion unit, the first clamping component and the second clamping component in the second direction are provided with sliding grooves, and the spring groove is installed in the sliding grooves.

[0013] Preferably, the installation device for the printed circuit board further comprises a mounting portion, wherein the mounting portion is connected to the extension portion and is used to cooperate with the guide rail.

[0014] Preferably, the mounting portion comprises: a mounting plate connected to the expansion unit; and a clamping component disposed on both sides of the mounting plate for cooperating with the guide rail.

[0015] The installation device for a printed circuit board in an embodiment of the present invention has an extension portion that can be expanded laterally to accommodate printed circuit boards of different sizes in the laterally direction, and a first clamping portion is provided on both lateral sides of the extension portion for clamping the printed circuit board in the laterally direction, and a second clamping portion is provided on both longitudinal sides of the extension portion for clamping the printed circuit board in the longitudinal direction, and a telescopic portion is provided to connect the second clamping portion and the extension portion to accommodate printed circuit boards of different sizes in the longitudinal direction, thereby effectively solving the problem of how to install printed circuit boards of various sizes.

[0016] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 is a schematic diagram of a mounting device for a printed circuit board according to the present invention.

[0019] Figure 2 FIG. 1 is a schematic diagram of a mounting device for a printed circuit board according to the present invention from another angle.

[0020] Figure 3 It is a partial structural schematic diagram of a mounting device for a printed circuit board according to the present invention.

[0021] Figure 4 It is a partial structural schematic diagram from another angle of the mounting device for a printed circuit board according to the present invention.

[0022] Figure 5 1 is a schematic structural diagram of an expansion unit of a mounting device for a printed circuit board according to the present invention.

[0023] Figure 6 It is a schematic structural diagram from another angle of the expansion unit of the mounting device for a printed circuit board according to the present invention.

[0024] Figure 7 It is a schematic structural diagram of a first clamping portion of a mounting device for a printed circuit board according to the present invention.

[0025] Figure 8 It is a schematic structural diagram of another angle of the first clamping portion of the mounting device for a printed circuit board according to the present invention.

[0026] Figure markings: 1-extension part; 11-extension unit; 111-matching groove; 12-connecting part; 121-first connecting component; 122-second connecting component; 13-first stroke spring; 2-first clamping part; 21-first clamping component; 22-second clamping component; 23-U-shaped groove; 3-second clamping part; 31-first movable claw; 32-second movable claw; 4-telescopic part; 41-second stroke spring; 42-spring groove; 43-cover plate; 5-slide groove; 6-mounting part; 61-mounting plate; 62-clamping component. DETAILED DESCRIPTION

[0027] The following specific embodiments are provided to help the reader obtain a comprehensive understanding of the methods, devices and / or systems described herein. However, after understanding the disclosure of the present application, various changes, modifications and equivalents of the methods, devices and / or systems described herein will be apparent. For example, the order of operations described herein is merely an example, and is not limited to the order set forth herein, but in addition to the operations that must occur in a particular order, changes that will be apparent after understanding the disclosure of the present application may be made. In addition, in order to improve clarity and brevity, descriptions of features known in the art may be omitted.

[0028] The features described herein may be implemented in different forms and should not be interpreted as being limited to the examples described herein. Rather, the examples described herein have been provided only to illustrate some of the many possible ways of implementing the methods, devices and / or systems described herein that will be apparent after understanding the disclosure of the present application.

[0029] Throughout the specification, when an element (such as a layer, a region, or a substrate) is described as being “on”, “connected to”, “bound to”, “over”, or “covering” another element, it may be directly “on”, “connected to”, “bound to”, “over”, or “covering” another element, or one or more other elements may be present between them. In contrast, when an element is described as being “directly on”, “directly connected to”, “directly bound to”, “directly over”, or “directly covering” another element, there may be no other elements present between them.

[0030] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0031] Although terms such as "first," "second," and "third" may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, or portions are not limited by these terms. Rather, these terms are only used to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Therefore, without departing from the teachings of the examples described herein, the first member, component, region, layer, or portion referred to may also be referred to as the second member, component, region, layer, or portion.

[0032] For ease of description, spatial relational terms such as "above", "upper", "below", and "lower" may be used herein to describe the relationship of one element to another element as shown in the accompanying drawings. Such spatial relational terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, an element described as being "above" or "upper" relative to another element will subsequently be "below" or "lower" relative to the other element. Therefore, the term "above" includes both "above" and "below" orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relational terms used herein will be interpreted accordingly.

[0033] The terms used herein are only used to describe various examples and are not used to limit the present disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms "include", "comprise" and "have" list the stated features, quantities, operations, components, elements and / or their combinations that exist, but do not exclude the existence or addition of one or more other features, quantities, operations, components, elements and / or their combinations.

[0034] Variations in the shapes shown in the drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include variations in shapes that occur during manufacturing.

[0035] The features of the examples described herein may be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have various configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application.

[0036] The present invention provides a mounting device for a printed circuit board, such as Figures 1 to 8 As shown, the mounting device for the printed circuit board comprises an expansion portion 1 , a first clamping portion 2 , a second clamping portion 3 and a telescopic portion 4 .

[0037] In the following description, reference will be made to Figures 1 to 8 The specific structure of the above components of the mounting device for the printed circuit board and the connection relationship of the above components are specifically described.

[0038] like Figure 1 and Figure 2As shown, in the embodiment, the extension part 1 is used as the main body, and the first clamping part 2 for clamping the printed circuit board in the horizontal direction is provided on both sides of the extension part 1 in the horizontal direction, and the second clamping part 3 for clamping the printed circuit board in the longitudinal direction is provided on both sides of the extension part 1 in the longitudinal direction. The second clamping part 3 is connected to the extension part 1 through the telescopic part 4, so that the second clamping part 3 can be telescoped in the longitudinal direction, thereby realizing the longitudinal adjustment of the size to adapt to printed circuit boards of different sizes, and the extension part 1 can be expanded in the horizontal direction, realizing the horizontal adjustment of the size to adapt to printed circuit boards of different sizes (in the specification, the horizontal and longitudinal directions refer to two directions perpendicular to each other, and do not limit the width direction or the length direction to the horizontal or longitudinal direction, and in the following embodiments, for ease of description, it can be Figure 1 The left-right direction in the paper is the horizontal direction. Figure 1 The up-down direction in the paper is the vertical direction).

[0039] Preferably, Figure 1 , Figure 5 and Figure 6 As shown, in the embodiment, the expansion portion 1 may include an expansion unit 11 and a connection portion 12. The expansion portion 1 may be composed of one or more expansion units 11, that is, the expansion portion 1 may be expanded in the horizontal direction by connecting multiple expansion units 11 to each other in the horizontal direction (the case where the expansion portion 1 is composed of multiple expansion units 11 is not shown). Connection portions 12 may be provided on both sides of the expansion unit 11 in the horizontal direction, and multiple expansion units 11 may be connected to each other through the connection portions 12, and the connection portions 12 may also be used to connect the first clamping portion 2.

[0040] Specifically, Figures 1 to 6 As shown, in an embodiment, the expansion unit 11 may be a rectangular plate, and the rectangular plate is adapted to the shape of the printed circuit board, so that the expansion portion 1 formed by connecting the expansion units 11 to each other is easier to place the printed circuit board, and the rectangle also makes it easier for multiple expansion units 11 to be aligned with each other when they are connected to each other laterally. The expansion unit 11 is provided with connecting portions 12 on both lateral sides, and the connecting portion 12 may include a first connecting component 121 and a second connecting component 122. The first connecting component 121 is arranged on one lateral side of the expansion unit 11, and the second connecting component 122 is arranged on the other lateral side of the expansion unit 11, that is, the first connecting component 121 and the second connecting component 122 are arranged opposite to each other. The first connecting component 121 and the second connecting component 122 can cooperate with each other to be connected. It can be, for example Figure 5 and Figure 6As shown, the first connecting component 121 is a cylindrical pin that protrudes laterally from the expansion unit 11, and the second connecting component 122 is a cylindrical pin hole that is embedded in the expansion unit 11. The position of the first connecting component 121 corresponds to the position of the second connecting component 122, so that multiple expansion units 11 can be aligned with each other when connected to each other. In order to ensure the structural stability when multiple expansion units 11 are connected to each other, in the embodiment, the cylindrical pins and the cylindrical pin holes can be set in three groups and arranged at equal distances along the longitudinal direction at the edge of the expansion unit 11. Here, the first connecting component 121 and the second connecting component 122 are set in three groups only as a setting method to adapt to the size of the expansion unit 11 in the embodiment. In actual production, adaptive adjustments can be made according to the actual size of the expansion unit 11.

[0041] However, it is not limited to this. The first connecting part 121 and the second connecting part 122 of the connecting part 12 are cylindrical pins and cylindrical pin holes, which is only one case in the embodiment. As long as it can satisfy the requirement that multiple expansion units 11 can be detachably connected to each other, the connecting part 12 can also be set to other connection methods. For example, a clip and a slot are set on both sides of the expansion unit, and the expansion units are matched with each other through clip connection.

[0042] Preferably, in an embodiment, Figure 1 and Figure 3 As shown, the first clamping portion 2 may include a first clamping component 21 and a second clamping component 22. The first clamping component 21 is arranged on one side of the extension unit 11 in the horizontal direction, and the second clamping component 22 is arranged on the other side of the extension unit 11 in the horizontal direction, that is, the first clamping component 21 and the second clamping component 22 are arranged opposite to each other. When the number of the extension unit 11 is one, the first clamping component 21 and the second clamping component 22 are connected to the same extension unit 11, and when the number of the extension unit 11 is multiple, the first clamping component 21 and the second clamping component 22 are respectively connected to the extension units 11 located at the two ends of the extension portion 1 in the horizontal direction. Specifically, for example: the extension portion is formed by connecting three extension units, the first clamping component located on the left side of the extension portion is connected to the left edge of the extension unit at the leftmost end of the extension portion, and the second clamping component located on the right side of the extension portion is connected to the right edge of the extension unit at the rightmost end of the extension portion.

[0043] Specifically, in the embodiments, Figure 7 and Figure 8 As shown, the first clamping member 21 and the second clamping member 22 may be T-shaped baffles having the same longitudinal length as the extension unit 11 (in the embodiment, the side facing the printed circuit board is the front side, and the side away from the printed circuit board is the back side, wherein, Figure 7 is the front side of the first clamping portion 2, and Figure 8The two T-shaped baffles are arranged opposite to each other, and the horizontal plates of the two T-shaped baffles are used to clamp the printed circuit board, while the vertical plates of the two T-shaped baffles are connected to the expansion unit 11. It can be that the first clamping part 21 and the second clamping part 22 are also provided with a first connecting part 121 or a second connecting part 122 at the ends connected to the expansion unit 11. In the embodiment, the first clamping part 21 is provided with three first connecting parts 121 corresponding to the positions of the second connecting parts 122 of the expansion unit 11, and the second clamping part 22 is provided with three second connecting parts 122 corresponding to the positions of the first connecting parts 121 of the expansion unit 11.

[0044] Preferably, in an embodiment, Figures 3 to 8 As shown, the expansion part 1 also includes a first travel spring 13, which is used to connect the expansion unit 11 with the first clamping part 21 and the second clamping part 22. A U-shaped groove 23 extending in the horizontal direction and protruding from the board surface may be formed on the back of the first clamping part 21 and the second clamping part 22, and the groove plate of the U-shaped groove 23 protrudes from the vertical plate of the T-shaped baffle, and the openings of the U-shaped grooves 23 of the first clamping part 21 and the second clamping part 22 are opposite. On the back of the expansion unit 11, a matching groove 111 extending in the horizontal direction and protruding from the board surface is formed, and the width of the notch of the matching groove 111 is equal to the width of the U-shaped groove 23, so that the protruding part of the U-shaped groove 23 can just be inserted into the notch of the matching groove 111, so as to realize the plug-in matching of the U-shaped groove 23 and the matching groove 111. A first spring column protruding from the board surface is formed in the U-shaped groove 23 of the first clamping part 21 and the second clamping part 22, and a second spring column protruding from the board surface is also formed at the end of the matching groove 111 of the expansion unit 11 away from the first clamping part 2, and the two ends of the first travel spring 13 are respectively fixed to the first spring column and the second spring column, so that the first travel spring 13 can connect and tighten the expansion unit 11 and the first clamping part 21 and the second clamping part 22.

[0045] Further, preferably, in the embodiment, two U-shaped grooves 23 are formed on the back of the first clamping member 21 and the second clamping member 22, and the two U-shaped grooves 23 are respectively formed at the upper and lower parts of the longitudinal direction of the first clamping member 21 and the second clamping member 22, and preferably, the position of the U-shaped groove 23 does not overlap with the connecting portion 12. Correspondingly, four matching grooves 111 are formed on the back of the expansion unit 11, and the notches of the matching grooves 111 are aligned with the transverse ends of the expansion unit 11, and the positions of the four matching grooves 111 are aligned with the positions of the U-shaped grooves 23, so that when assembled, the U-shaped grooves 23 of the first clamping member 21 and the second clamping member 22 can be simultaneously inserted into the matching grooves 111 of the expansion unit 11. In this way, the expansion unit 11 can be fixed more firmly when connected with the first clamping part 21 and the second clamping part 22, and it is not easy to fall off, and the first stroke spring 13 provides a lateral tensioning force, which can pull the first clamping part 21 and the second clamping part 22 toward the expansion unit 11. When the lateral size of the printed circuit board is larger than the lateral spacing between the first clamping part 21 and the second clamping part 22, the first clamping part 21 and the second clamping part 22 can be stretched laterally to further expand the spacing between the two to accommodate the printed circuit board, and the first stroke spring 13 provides a lateral tension to clamp the printed circuit board. When the expansion part 1 includes a plurality of expansion units 11, the first stroke spring 13 can be installed only by the expansion units 11 located at the lateral ends of the expansion part 1, and the two expansion units 11 are each connected with two first stroke springs 13. In this case, the notch of the matching groove 111 is aligned with the lateral end of the expansion unit 11, so that when two adjacent expansion units 11 are connected to each other, the matching groove 111 will not hinder them.

[0046] Preferably, in an embodiment, Figures 1 to 4 As shown, the second clamping portion 3 may include a first movable claw 31 and a second movable claw 32. The first movable claw 31 is arranged on both sides of the longitudinal direction of the expansion unit 11, that is, two first movable claws 31 will be added for each expansion unit 11 added to the expansion portion 1, so as to ensure that when the size of the printed circuit board is large, the second clamping portion 3 can still firmly clamp the printed circuit board. The second movable claw 32 is arranged on both sides of the longitudinal direction of the first clamping component 21 and the second clamping component 22, so that the printed circuit board can still be clamped by the second clamping portion 3 at the lateral edge. Specifically, the first movable claw 31 and the second movable claw 32 are both formed with claws extending and bending toward the front, and as shown in FIG. Figure 2As shown, arc-shaped protrusions are formed in the claws of the first movable claw 31 and the second movable claw 32 to cope with stress concentration. Preferably, the lateral dimension of the first movable claw 31 can be smaller than the lateral dimension of the expansion unit 11, while the lateral dimension of the second movable claw 32 is equal to the lateral dimension of the first clamping member 21 and the second clamping member 22.

[0047] Further, preferably, in an embodiment, Figures 2 to 4 As shown, the telescopic part 4 may include a second travel spring 41, a spring slot 42 and a cover plate 43, and the second clamping part 3 is connected to the first clamping part 2 and the two sides of the extension part 1 in the longitudinal direction through the telescopic part 4. Specifically, a rectangular spring slot 42 protruding outward is formed on the back of the first movable claw 31 and the second movable claw 32, and the spring slot 42 extends from the bottom edge of the first movable claw 31 or the second movable claw 32 in the length direction, and the protruding part contacts the back of the extension unit 11 or the first clamping part 2. The second travel spring 41 is installed in the spring slot 42, and a protruding third spring column may be provided on the back of the first movable claw 31 or the second movable claw 32, and the third spring column is located at one end in the spring slot 42. The spring slot 42 is provided with an opening at the other end, and a protruding fourth spring column is formed at the opening on the back of the expansion unit 11 and the first clamping part 2, and the second travel spring 41 is connected with the third spring column and the fourth spring column, thereby connecting the first movable claw 31 with the expansion unit 11 and connecting the second movable claw 32 with the first clamping part 21 and the second clamping part 22. The cover plate 43 is a rectangular plate of the same size as the spring slot 42, which is used to shield the inside of the spring slot 42 and prevent the second travel spring 41 from falling out.

[0048] Further, preferably, in the embodiment, the expansion unit 11, the first clamping member 21 and the second clamping member 22 are provided with a slide groove 5 protruding from the board surface on both sides of the longitudinal direction of the back. The slide groove 5 is arranged longitudinally, and the size of its notch is equal to the width of the spring groove 42, so that the spring groove 42 can match the slide groove 5, and the second travel spring 41 is used to provide a pulling force, thereby realizing that the second clamping portion 3 is slidably connected to the first clamping portion 2 and the expansion portion 1 through the telescopic portion 4.

[0049] Preferably, in an embodiment, Figure 2 As shown, the mounting device for the printed circuit board may further include a mounting portion 6. The mounting portion 6 may be disposed on the back of the extension portion 1 and is fixedly connected to the extension portion 1 for clamping the mounting device for the printed circuit board to the guide rail inside the electric control box.

[0050] Preferably, in the embodiment, the mounting portion 6 may include a mounting plate 61 and a clamping member 62. The longitudinal dimension of the mounting plate 61 may be equal to the longitudinal dimension of the expansion unit 11, and the transverse dimension may be equal to the transverse dimension after the expansion portion 1 is connected to the first clamping portion 2, so as to cover the back of the expansion portion 1 and the first clamping portion 2, and avoid the exposure of the first travel spring 13 and other structures. Further, the cover plate 43 may be screwed to the spring slot 42 at one end away from the mounting plate 61, so that when the second clamping portion 3 is longitudinally stretched, both ends of the second travel spring 41 can be covered by the cover plate 43 or the mounting plate 61, and the second travel spring 41 is avoided from being exposed. In actual application, the transverse dimension of the mounting plate 61 can be adaptively modified according to the number of expansion units 11 actually used. On both transverse sides of the mounting plate 61, there are also clamping members 62 protruding to the back, which are used to connect to the guide rail.

[0051] Specifically, the clamping member 62 may be: Figure 2 As shown, the clamping structure for clamping on the DIN35 rail is formed into an angular protrusion, a horizontal portion, a recessed portion and a horizontal protrusion in sequence along the longitudinal direction. The DIN35 rail is clamped between the angular protrusion and the horizontal protrusion. When installed, the extension direction of the DIN35 rail is perpendicular to the extension direction of the clamping component 62, and the DIN35 rail is clamped on two clamping components 62 at the same time. Not limited to this, the above embodiment is only one case of the clamping component 62, and the clamping component 62 can also be formed in other shapes to match other types of rails or installation structures.

[0052] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The protection scope of the present application is not limited thereto. Although the present application is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed in the present application, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A mounting device for a printed circuit board, characterized in that: The mounting device for the printed circuit board comprises: Extension Department; A first clamping portion, arranged on both sides of the extension portion in a first direction, for clamping the printed circuit board in the first direction; second clamping portions, disposed on both sides of the extension portion in a second direction perpendicular to the first direction, for clamping the printed circuit board in the second direction; and a telescopic portion, connecting the second clamping portion and the expansion portion; The extension part comprises: an expansion unit, wherein the expansion portion is composed of one expansion unit or a plurality of expansion units connected to each other in the first direction; and A connecting portion, wherein the two sides of the expansion unit in the first direction are provided with connecting portions; The first clamping portion comprises: A first clamping member, disposed on one side of the extension portion in a first direction; and A second clamping member, disposed on the other side of the extension portion in the first direction; The expansion portion further includes a first travel spring for connecting the expansion unit with the first clamping component and connecting the expansion unit with the second clamping component.

2. The mounting device for a printed circuit board according to claim 1, characterized in that: The connecting portion comprises: A first connecting component, disposed on one side of the extension unit in a first direction; and A second connecting component, disposed at the other side of the extension unit in the first direction, and configured to cooperate and connect with the first connecting component; The first connecting member or the second connecting member is provided on one side of the first clamping member and the second clamping member connected to the expansion unit.

3. The mounting device for a printed circuit board according to claim 1, characterized in that: The second clamping portion comprises: first movable claws, arranged on both sides of the expansion unit in the second direction; and The second movable clamping claw is arranged on both sides of the first clamping component and the second clamping component in the second direction.

4. The mounting device for a printed circuit board according to claim 3, characterized in that: The telescopic portion comprises: A second travel spring, used for connecting the first movable jaw with the expansion unit and for connecting the second movable jaw with the first clamping member and the second clamping member; a spring slot, wherein the second travel spring is installed in the spring slot, and the spring slot is connected to the first movable claw or the second movable claw; and A cover plate is provided in the spring slot.

5. The mounting device for a printed circuit board according to claim 4, characterized in that: The expansion unit, the first clamping component and the second clamping component are all provided with sliding grooves on both sides in the second direction, and the spring groove is installed in the sliding grooves.

6. The mounting device for a printed circuit board according to claim 1, characterized in that: The printed circuit board is installed inside the electric control box. The installation device for the printed circuit board also includes a mounting portion, which is connected to the extension portion and is used to clamp the installation device for the printed circuit board to the guide rail inside the electric control box.

7. The mounting device for a printed circuit board according to claim 6, characterized in that: The installation part comprises: a mounting plate connected to the expansion unit; and The clamping components are arranged on both sides of the mounting plate and are used to cooperate with the guide rails.

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