CN213094554U

CN213094554U - Circuit board fixing structure

Info

Publication number: CN213094554U
Application number: CN202022053608.4U
Authority: CN
Inventors: 林海峰
Original assignee: Tianjin Tupo Electrical Technology Co ltd
Current assignee: Tianjin Tupo Electrical Technology Co ltd
Priority date: 2020-09-18
Filing date: 2020-09-18
Publication date: 2021-04-30
Anticipated expiration: 2030-09-18

Abstract

The utility model discloses a circuit board fixed knot constructs for fixed circuit board, circuit board fixed knot constructs and includes: a spring member for holding a first surface of the circuit board in a first direction; a positioning rod fixed relative to the circuit board and traversing the circuit board, a contour of at least a portion of the positioning rod mating with a contour of at least a portion of the circuit board such that the circuit board is blocked from moving in a second direction perpendicular to the first direction; and an elastic pressing piece arranged on the positioning rod, wherein at least one part of the elastic pressing piece is pressed against a second surface of the circuit board opposite to the first surface in a third direction which is approximately opposite to the first direction, so that the elastic pressing piece and the spring member are matched to limit the movement of the circuit board in the first direction and the third direction. The circuit board fixing structure can effectively alleviate the stress of the circuit board, and is particularly suitable for being used in the occasions with frequent vibration.

Description

Circuit board fixing structure

Technical Field

The utility model relates to a power adapter's technical field, especially a circuit board fixed knot constructs.

Background

In the power adapter, it is necessary to fix the circuit board in the housing of the power adapter. Traditionally, rigid connections have been used to directly secure the circuit board, however, this is not suitable for frequent vibration applications.

In applications where vibrations are frequent (e.g., industrial equipment, automobiles), the circuit board is susceptible to damage from the forces of the high frequency vibrations.

Thus, there is still room for improvement.

SUMMERY OF THE UTILITY MODEL

The utility model provides a be suitable for circuit board fixed knot who uses at high frequency oscillation occasion and construct.

This is realized by the following technical scheme: a circuit board fixing structure for fixing a circuit board, the circuit board fixing structure comprising: a spring member for holding a first surface of the circuit board in a first direction; a positioning rod fixed relative to the circuit board (e.g., a positioning rod rigidly fixed to a power adapter) and traversing the circuit board, a profile of at least a portion of the positioning rod mating with a profile of at least a portion of the circuit board such that movement of the circuit board relative to the positioning rod in a second direction perpendicular to the first direction is blocked; and an elastic pressing piece arranged on the positioning rod, wherein at least one part of the elastic pressing piece is pressed against a second surface of the circuit board opposite to the first surface in a third direction which is approximately opposite to the first direction, so that the elastic pressing piece and the spring member are matched to limit the movement of the circuit board in the first direction and the third direction.

Advantageously, a buffer layer is arranged at a contact portion between the circuit board and the positioning rod. Thereby, relative movement between the circuit board and the power adapter in the second direction can be effectively mitigated.

Advantageously, the buffer layer is arranged on the positioning rod. Thus, the arrangement of the buffer layer does not have an excessive influence on the circuit board, which is more convenient for production and installation.

Advantageously, the (substantially central region of the) circuit board is provided with a first through hole for the positioning rod to pass through, the hole profile of the first through hole being adapted to the size and shape of the outer contour of the positioning rod. Furthermore, the first through hole is circular, and the positioning rod is cylindrical; the first through hole is opened at a substantially center/substantially central region of the circuit board. Here, "central" may be understood as a shape that leaves a complete circular through hole on the circuit board in advance, or that the complete first through hole is completely contained within the circuit board without contacting the edge of the circuit board, i.e., the first through hole is not at the edge of the circuit board. Generally, for a power adapter having a small size, it is possible to achieve good fixation with a simple structure by disposing only one through hole for passing the positioning rod in the central region and then providing the elastic pressing piece.

Further, two elastic pressing pieces arranged diametrically opposite to each other are provided on the positioning rod(s). This can obtain a good fixing effect with a simple structure, and is convenient to install.

Advantageously, the second surface of the circuit board is pressed against the free end of the elastic pressing piece. Whereby the arrangement of the elastic pressing piece can be facilitated.

Advantageously, the positioning rod is provided with a thread and is fixed in a power adapter by means of the thread. This facilitates especially the selection and fixation of the positioning rod.

Drawings

The invention will be described below with reference to the accompanying drawings, in which:

fig. 1 is a schematic view of a circuit board fixing structure according to an embodiment of the present invention; and

fig. 2 schematically shows a cross-section at a first through hole of a circuit board.

Detailed Description

Fig. 1 shows the circuit board 10 within the power adapter, the circuit board 10 being placed on the spring member 20, the spring member supporting the first surface 11 of the circuit board 10 in the first direction D1.

A positioning rod 30 is disposed in the power adapter, and the positioning rod 30 is fixed with respect to the circuit board 10, for example, in fig. 1, the bottom of the positioning rod 30 is fixed to the housing of the power adapter. Meanwhile, a first through hole 60 is formed in the circuit board 10 in advance, the positioning rod 30 passes through the first through hole 60 in the circuit board 10, and the contour of the positioning rod 30 matches the contour of the first through hole 60, so that the relative movement of the circuit board 10 with respect to the positioning rod 30 in a second direction D2 perpendicular to the first direction D1 is blocked. Here, the direction D2 is not only a single direction, but refers to all directions perpendicular to D1, for example, in fig. 1, all directions in a horizontal plane.

Particularly advantageously, as shown in fig. 2, a cushioning layer 50 is formed on the outer periphery of the positioning rod 30, and any cushioning/shock absorbing material may be used for the cushioning layer 50, such as an elastomer material, a rubber strip, an air bag, or the like. In this way, when there is a tendency of movement in the direction D2, the buffer layer 50 reduces the acting force of the relative movement between the positioning rod 30 and the circuit board 10, so that the circuit board 10 can be better protected by buffering in the direction D2.

According to one embodiment, the first through hole 60 is a circular hole and the positioning rod 30 is a cylindrical rod. This facilitates the machining implementation (for example, the locating rod may be directly threaded rod). Of course, the positioning rod 30 may take other shapes depending on the layout of the circuit board.

On the positioning rod 30, an elastic pressing piece 40 is provided, a portion (in particular the free end) of the elastic pressing piece 40 is pressed against the second surface 12 of the circuit board 10 opposite to the first surface 11 in a third direction D3 substantially opposite to the first direction D1, in such a way that the spring pressing piece 40 acts together with the spring member 20, the two elastic elements limiting the movement/tendency of the circuit board 10 in opposite directions, i.e. the first direction D1 and the third direction D3. Since both the spring member 20 and the elastic pressing piece 40 have elasticity, it is possible to better alleviate the force of the vibration acting on the circuit board 10 in the longitudinal direction of fig. 1 (i.e., the first direction D1 and the third direction D3), especially more effective against high-frequency vibration.

According to one embodiment, each locating rod 30 is provided with two resilient preforms 40 arranged diametrically (diametrically) opposite each other. That is, the two elastic pressing pieces 40 are arranged at an interval of 180 ° with respect to the positioning rod 30. In this way, the elastic pressing action is directly exerted in at least two directions, which can ensure a simple structure while stabilizing the fixation.

The elastic pressing piece 40 and the positioning rod 30 may be integrally formed, or the elastic pressing piece 40 may be fixed to the positioning rod 30 by welding, for example.

According to one embodiment, the positioning rod 30 is a screw/stud, whereby the positioning rod 30 is fixed inside the power adapter by a threaded connection. For example, the positioning rod 30 is provided at least at one end (e.g., in fig. 1, on an outer peripheral surface of a lower end portion of the positioning rod 30) with a male screw by which the positioning rod is screwed in a threaded groove (not shown) located inside the power adapter.

In addition, the first through hole 60 is not necessarily integrally formed inside the circuit board 10, but may be formed to interface with an edge of the circuit board 10, in other words, the first through hole 60 is opened at the edge of the circuit board 10. At this time, in order to secure the fixing effect, it is necessary to arrange a plurality of first through holes 60 along the edge/periphery of the circuit board, and in particular, the first through holes 60 are equally spaced on the edge/periphery of the circuit board 10, for example, 2 first through holes are arranged substantially diagonally (i.e., 180 ° apart) on the edge/periphery of the circuit board 10, or 3 first through holes are arranged 120 degrees apart from each other.

Thus, the technical problem is solved.

Claims

1. A circuit board fixing structure for fixing a circuit board, the circuit board fixing structure comprising:

a spring member for holding a first surface of the circuit board in a first direction;

a positioning rod fixed relative to the circuit board and traversing the circuit board, a profile of at least a portion of the positioning rod mating with a profile of at least a portion of the circuit board such that movement of the circuit board relative to the positioning rod in a second direction perpendicular to the first direction is blocked; and

a resilient tab disposed on the positioning rod, at least a portion of the resilient tab pressing against a second surface of the circuit board opposite the first surface in a third direction substantially opposite the first direction such that cooperating with the spring member limits movement of the circuit board in the first direction and the third direction.

2. The circuit board fixing structure according to claim 1, wherein a buffer layer is provided at a contact portion between the circuit board and the positioning rod.

3. The circuit board fixing structure according to claim 2, wherein the buffer layer is fixed to the positioning rod.

4. The circuit board fixing structure according to claim 1, wherein a first through hole through which the positioning rod passes is provided at a center of the circuit board, and a hole profile of the first through hole is adapted to a size and a shape of an outer profile of the positioning rod.

5. The circuit board fixing structure according to claim 4, wherein the first through hole is circular in shape, and the positioning rod is cylindrical in shape.

6. The circuit board fixing structure according to claim 4, wherein the first through hole is opened at a substantially center of the circuit board.

7. The circuit board fixing structure according to claim 1, wherein two elastic pressing pieces arranged diametrically opposite to each other are provided on each positioning rod.

8. The circuit board fixing structure according to claim 1, wherein a free end of the elastic pressing piece presses against a second surface of the circuit board opposite to the first surface in a third direction substantially opposite to the first direction.

9. The circuit board fixing structure according to any one of claims 1 to 8, wherein the positioning rod is provided with a screw thread and fixed in a power adapter by means of the screw thread.