Clamping groove tightly matched with thickness of PCB (Printed Circuit Board) and LED (Light Emitting Diode) lamp

Abstract

The utility model provides a clamping groove tightly matched with the thickness of a PCB. The clamping groove is divided into a first section, a second section and a third section along the section in the height direction. The two sides of the section of the first section in the height direction are inclined planes, so that the opening of the first section is gradually reduced in the direction close to the second end; the width of the section of the second section in the height direction is L2, and the width of the section of the third section in the height direction is L3 and L3lt; the second section and the third section are connected together through a transition section; the height of the third section is L1; the section, in the thickness direction, of the clamping groove is of a structure with the width gradually reduced, and the width L4 of the innermost side is gradually reduced to the width L5 of the outermost side. The utility model further provides an LED lamp. A clamping groove used for being connected with the driving circuit board in an inserted mode is formed in the inner wall of the radiator. The clamping groove is the above clamping groove.

Description

Technical Field

[0001] The utility model relates to the field of lighting, especially an LED lamp is provided. Background Art

[0002] The PCB material is cut from a whole sheet of 1m * 1m or even larger area into small pieces. The area of the whole sheet is very large. During the production process, it is very difficult to ensure that the tolerance of the sheet thickness is very small and meets the requirement of tight fitting with the plastic part. The normal industry standard tolerance is ±10%, that is, ±0.16mm (taking a 1.6mm sheet as an example). In order to avoid the above adverse effects in tight fitting, the tolerance is required to reach ±0.05mm or even smaller. Moreover, due to the change of temperature and humidity environment, the thickness of the sheet also has a certain expansion change, making it even more difficult to achieve the tight fitting thickness of the card slot.

[0003] To solve this problem, the existing technology is to bond with glue or add foam gaskets for filling, which has the disadvantages of increasing material cost, increasing labor cost, and for those using glue, it also has a long curing time, affecting the continuity of the production line and increasing time cost. Content of the Utility Model

[0004] The main technical problem to be solved by the utility model is to provide a card slot for tightly fitting the PCB thickness, which solves the technical problem that it can be applicable even when the PCB thickness has a large tolerance.

[0005] To solve the above technical problem, the utility model provides a card slot for tightly fitting the PCB thickness. The cross-section of the card slot along the height direction is divided into a first section, a second section and a third section;

[0006] On both sides of the cross-section of the first section along the height direction are inclined planes, so that the opening of the first section gradually becomes smaller along the direction close to the second end;

[0007] The width of the second section along the cross-section of the height direction is L2, the width of the third section along the cross-section of the height direction is L3, L3 < L2, and the second section and the third section are connected together through a transition section; the height of the third section is L1;

[0008] The cross-section of the card slot along the thickness direction is a structure with gradually shrinking width, gradually shrinking from the innermost width L4 to the outermost width L5.

[0009] The invention also provides an LED lamp, including: a lamp shade, a light source board, a radiator, a lamp head and a driving circuit board; a card slot for plugging with the driving circuit board is arranged on the inner wall of the radiator; the card slot is the card slot as described above.

[0010] In a preferred embodiment: the heat sink is provided with an installation cavity along the axial direction, and the card slot is provided on the side wall of the installation cavity.

[0011] In a preferred embodiment: the lamp holder is mounted on the lower end of the heat sink along the axial direction, and the lampshade is mounted on the upper end of the heat sink along the axial direction.

[0012] In a preferred embodiment: a side of the heat sink is provided with a clearance opening connected to the installation cavity, a switch is provided on the driving circuit board, and a dial button is linked to the switch through the clearance opening.

[0013] Compared with the prior art, the technical solution of the utility model has the following beneficial effects:

[0014] The utility model provides a card slot which is tightly matched with the thickness of the PCB, and can find the best balance point between appropriate PCB pressure and appropriate insertion friction force, so that the PCB does not shake and the difficulty of PCB insertion in production is moderate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is an exploded view of the LED lamp in the preferred embodiment of the utility model;

[0016] Figure 2 A three-dimensional diagram of a card slot in a preferred embodiment of the utility model;

[0017] Figure 3 This is a schematic diagram of a card slot in a preferred embodiment of the utility model;

[0018] Figure 4 This is a schematic diagram of the card slot at another angle in the preferred embodiment of the utility model. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be described clearly and completely below in conjunction with the accompanying drawings; it is obvious that the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the utility model without making creative work are within the scope of protection of the utility model.

[0020] In the description of the present utility model, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installed", "provided with", "sleeved / connected", "connected", etc. should be understood in a broad sense. For example, "connection" can be a wall-mounted connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be a direct connection or an indirect connection through an intermediate medium. It can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0021] Reference Figure 1-4 , this embodiment provides an LED lamp, including: a lamp cover 1, a light source board 2, a radiator 4, a lamp head 5, and a driving circuit board 3; a card slot for plugging with the driving circuit board 3 is arranged on the inner wall of the radiator 4. The radiator 4 is axially provided with an installation cavity, and the card slot is arranged on the side wall of the installation cavity. The lamp head 5 is installed at the lower end of the radiator 4 along the axis, and the lamp cover 1 is installed at the upper end of the radiator 4 along the axis. A relief opening communicating with the installation cavity is arranged on the side surface of the radiator 4, and a switch is arranged on the driving circuit board 3, and a knob is in linkage cooperation with the switch through the relief opening.

[0022] The cross-section of the card slot along the height direction is divided into a first section, a second section, and a third section; both sides of the cross-section of the first section along the height direction are inclined planes, so that the opening of the first section gradually becomes smaller along the direction close to the second end; the width of the second section along the cross-section of the height direction is L2, the width of the third section along the cross-section of the height direction is L3, L3 < L2, and the second section and the third section are connected together through a transition section; the height of the third section is L1; the cross-section of the card slot along the thickness direction has a structure with gradually shrinking widths, gradually shrinking from the innermost width L4 to the outermost width L5.

[0023] As Figure 2 shown, since L5 < L4, when the PCB enters the card slot, the left side ensures the planar position accuracy of the PCB, and the right sharp corner ensures the extrusion of the PCB, which not only ensures the position stability of the PCB in the planar direction but also ensures that the PCB is tightly pressed and the size does not shake. When there are size changes in the thickness of the PCB, this sharp corner can generate some elastic force relatively well, and even collapse to adapt to the thickness size changes.

[0024] Since L3 < L2, the width area of L2 is used as the auxiliary fixing area for the PCB, the L3 area is used as the tight-fitting control area for the PCB, and the height of L1 is used as the friction control area. When the PCB is inserted into the slot, it first enters the guiding chamfer area where the opening is relatively wide, and the PCB can be more easily and smoothly inserted; then it enters the auxiliary fixing area where the PCB is relatively loose, with little or no friction, to ensure smooth and deeper insertion of the PCB; then it enters the tight-fitting control area. In this area, for a PCB with a smaller thickness, there will be a smaller extrusion force, and for a PCB with a larger thickness, there will be a larger extrusion force, and even the plastic sharp corner of the PCB may be damaged by extrusion to adapt to the thickness of the PCB. By adjusting the reasonable height of L1, the best balance point can be found between the appropriate PCB pressure and the appropriate insertion friction force, so that the PCB does not shake and the insertion difficulty of the PCB in production is also moderate.

[0025] The above description is only a preferred specific implementation method of the utility model, and does not limit the patent scope of the utility model. Any technical equivalent changes made using the contents of the utility model specification are within the protection scope of the utility model.

Claims

1. A card slot that closely matches the thickness of a PCB, characterized in that: The cross-section of the card slot along the height direction is divided into a first section, a second section and a third section; Both sides of the cross-section of the first section along the height direction are inclined surfaces, so that the opening of the first section gradually becomes smaller along the direction close to the second end; The width of the second section in the cross-section along the height direction is L2, the width of the third section in the cross-section along the height direction is L3, L3 < L2, and the second section and the third section are connected together through a transition section; the height of the third section is L1; The cross-section of the card slot along the thickness direction has a structure with gradually decreasing width, gradually contracting from the innermost width L4 to the outermost width L5.

2. An LED lamp, characterized in that Comprising: A lamp cover, a light source board, a radiator, a lamp head and a driving circuit board; a card slot for plugging with the driving circuit board is arranged on the inner wall of the radiator; The card slot is the card slot described in claim 1.

3. The LED lamp according to claim 2, characterized in that: The radiator is provided with an installation cavity penetrating along the axis, and the card slot is arranged on the side wall of the installation cavity.

4. The LED lamp according to claim 3, characterized in that: The lamp head is installed at the lower end of the radiator along the axis, and the lamp cover is installed at the upper end of the radiator along the axis.

5. The LED lamp according to claim 3, characterized in that: A relief opening communicating with the installation cavity is arranged on the side surface of the radiator, a switch is arranged on the driving circuit board, and a toggle button is in linkage cooperation with the switch through the relief opening.

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