Structure for fixing MOS (Metal Oxide Semiconductor) tube by utilizing wire holder and lower plastic part

Abstract

The utility model discloses a structure for fixing a metal oxide semiconductor (MOS) tube by using a wire holder and a lower plastic part, which relates to the field of controllers, adopts the technical scheme that the structure comprises the wire holder, the MOS tube, a circuit board and a shell, and is characterized in that the wire holder is positioned above the circuit board; a screw penetrates through the wire holder and the circuit board and then is connected to a supporting strip, the supporting strip is connected with the inner wall of the shell, and the MOS tube is tightly pressed between the circuit board and the shell. The structure is simpler, more reliable and firmer, no pressure spring is needed, no stress is generated on the aluminum shell, the aluminum shell does not deform, the performance of vibration and falling resistance is better, machining is easy, and the production cost is lower.

Description

Technical Field

[0001] The utility model relates to the field of controllers, in particular to a structure for fixing a MOS tube by utilizing a wiring seat and a lower plastic part. Background Art

[0002] MOS tube is an important component in the controller. MOS tube is usually pressed in the controller (such as Figure 3 ): Use the compression spring to clamp into the groove of the aluminum shell, and use the elastic deformation generated by the angle change of the inner angle of the compression spring to press the MOS tube.

[0003] In order to ensure that the MOS tube is tightly attached to the aluminum shell, the size of L1 should be as small as possible to ensure the size of the pressing force F1, so the size L2 should also be smaller (see Figure 3 When the controller vibrates or falls, the MOS tube may be displaced. Since the size of L2 is too small, the compression spring and the MOS tube may be displaced. Figure 3 If the temperature changes, the MOS tube will separate from the aluminum shell, affecting the heat dissipation effect and even causing damage to the MOS tube.

[0004] After the compression spring is pressed into the groove of the aluminum shell and the assembly is completed, a force F2 will be generated towards the aluminum shell. The F2 force acts on the aluminum shell, which may cause the side of the aluminum shell to deform and affect the assembly. In order to eliminate the stress F2, the aluminum shell wall thickness and R angle can be increased ( Figure 3 ) method, but this method will increase the weight of the aluminum shell and increase product cost.

[0005] In addition, when assembling this solution, a special compression spring machine is required to press the compression spring into the aluminum shell. Utility Model Content

[0006] In order to solve the above technical problems, the utility model provides a structure for fixing the MOS tube by using a terminal block and a lower plastic part. The structure is simpler, more reliable and firm, does not require the use of a compression spring, does not generate stress on the aluminum shell, the aluminum shell will not deform, has better resistance to vibration and falling, is simple to process, and has lower production costs.

[0007] The technical solution adopted by the utility model to solve the technical problem is: a structure for fixing the MOS tube by using a terminal block and a lower plastic part, comprising a terminal block, a MOS tube, a circuit board and a shell, characterized in that:

[0008] The terminal block is located above the circuit board; the screw passes through the terminal block and the circuit board and is connected to the support bar, the support bar is connected to the inner wall of the shell, and the MOS tube is pressed between the circuit board and the shell.

[0009] This solution uses screws, terminal blocks and circuit boards to firmly press the MOS tube against the housing. The pressure on the MOS tube is directly provided by the circuit board. The overall structure is more reliable and simple, and no additional compression spring is required.

[0010] Preferably, the inner wall of the housing is provided with a slot, and the support bar is fixed to the slot, so as to facilitate screw connection and the support bar can support the circuit board.

[0011] Preferably, grooves are provided on both sides of the lower end of the support bar, and hooks are provided on the inner wall of the slot to fit into the grooves, so as to facilitate the fixing of the support bar and ensure that the fixing is firm enough.

[0012] Preferably, a support bar is provided between the circuit board and the housing, and the screw is connected to the housing after passing through the support bar, so as to provide support for the lower side of the circuit board at the screw position and prevent damage to the circuit board caused by excessive pressure from the screw.

[0013] Preferably, the housing is provided with a groove for accommodating the support bar, which makes it more convenient to position the support bar.

[0014] Preferably, the support bar is made of plastic material, which makes installation more convenient and reduces cost.

[0015] Preferably, the MOS tubes are distributed on both sides of the screw, so that the pressure is more balanced and the fixation is more firm and stable.

[0016] Preferably, the terminal block is provided with a through hole for the screw to pass through, and pressure feet are provided on both sides of the through hole for contacting the circuit board, so that the pressure provided by the screw can be better applied to the top of the MOS tube by means of the pressure feet.

[0017] Preferably, when the presser foot contacts the circuit board, a gap is left between the inner end of the through hole and the circuit board, so that when the screw presses down the wire holder, the inner end of the through hole has room to move further toward the circuit, thereby better applying pressure to the circuit board through the presser foot.

[0018] Beneficial effects of the utility model:

[0019] The structure is simpler, more reliable and stronger, does not require the use of compression springs, does not generate stress on the aluminum shell, the aluminum shell will not deform, has better resistance to vibration and falling, is simple to process, and has lower production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only three of the drawings of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 A cross-sectional view of an embodiment of the present utility model;

[0022] Figure 2 A perspective view of an embodiment of the present utility model;

[0023] Figure 3 A schematic diagram of the prior art of an embodiment of the present utility model;

[0024] Among them, 1. Terminal block; 2. MOS tube; 3. Circuit board; 4. Shell; 5. Support bar; 6. Screw; 7. Presser foot; 8. Compression spring. DETAILED DESCRIPTION

[0025] In order to deepen the understanding of the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and embodiments. The embodiments are only used to explain the present invention and do not limit the scope of protection of the present invention.

[0026] Example

[0027] like Figure 1 As shown, a structure for fixing a MOS tube by using a terminal block and a lower plastic part includes a terminal block 1, a MOS tube 2, a circuit board 3 and a housing 4. Figure 2 As shown, the terminal block 1 is located above the circuit board 3; screws 6 pass through the terminal block 1 and circuit board 3 and connect to the support bar 5. The support bar 5 is connected to the inner wall of the housing 4, and the MOS tube 2 is compressed between the circuit board 3 and the housing 4. This solution utilizes the screws 6, terminal block 1, and circuit board 3 to firmly press the MOS tube 2 against the housing 4. The pressure on the MOS tube 2 is directly provided by the circuit board 3, making the overall structure more reliable and simple, and eliminating the need for a separate compression spring 8.

[0028] The inner wall of the housing 4 is provided with a slot, and the support bar 5 is fixed to the slot, which is convenient for connecting screws, and the support bar 5 can also support the circuit board 3.

[0029] The lower ends of the support bar 5 are provided with grooves on both sides, and the inner wall of the slot is provided with hooks adapted to fit into the grooves, so as to facilitate the fixing of the support bar 5 and ensure that the fixing is firm enough.

[0030] The housing 4 is provided with a groove for accommodating the support bar 5, making it more convenient to position the support bar 5.

[0031] The support bar 5 is made of plastic material, which makes installation more convenient and reduces cost.

[0032] The MOS tubes 2 are distributed on both sides of the screw 6. The pressure is more balanced and the fixation is more firm and stable.

[0033] The terminal block 1 is provided with a through hole for the screw 6 to pass through, and pressure feet 7 are provided on both sides of the through hole to contact the circuit board 3. The pressure provided by the screw 6 can be better applied to the top of the MOS tube 2 by the pressure feet 7.

[0034] When the presser foot 7 is in contact with the circuit board 3, a gap is left between the inner end of the through hole and the circuit board 3. This allows the inner end of the through hole to move further toward the circuit when the screw 6 presses down on the wire holder 1, thereby better applying pressure to the circuit board 3 through the presser foot 7.

[0035] Combine Figure 1 As shown, during the tightening process of self-tapping screw 6, upward tightening force F3 is transmitted through terminal block 1 and converted into downward pressure F4, F5, which is then transmitted to circuit board 3, flattening MOS tube 2. Finally, glue is poured into the aluminum shell, and after the glue cures, MOS tube 2 is completely fixed.

[0036] Beneficial effects of the utility model:

[0037] The structure is simpler, more reliable and stronger, does not require the use of a compression spring 8, does not generate stress on the aluminum shell, the aluminum shell will not deform, has better vibration and drop resistance, is simple to process, and has lower production costs.

[0038] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0039] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art could make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A structure for fixing a MOS tube using a terminal block and a lower plastic part, comprising a terminal block (1), a MOS tube (2), a circuit board (3) and a housing (4), characterized in that: The wiring base (1) is located above the circuit board (3); a screw (6) passes through the wiring base (1) and the circuit board (3) and is connected to a support bar (5); the support bar (5) is connected to the inner wall of the housing (4); and the MOS tube (2) is pressed between the circuit board (3) and the housing (4).

2. The structure for fixing a MOS tube using a terminal block and a lower plastic part according to claim 1, characterized in that: The inner wall of the housing (4) is provided with a slot, and the support bar (5) is fixed to the slot.

3. The structure for fixing a MOS tube using a terminal block and a lower plastic part according to claim 2, characterized in that: Grooves are provided on both sides of the lower end of the support bar (5), and hooks are provided on the inner wall of the groove to fit into the groove.

4. The structure for fixing a MOS tube using a terminal block and a lower plastic part according to claim 3, characterized in that: The housing (4) is provided with a groove for accommodating the support bar (5).

5. The structure for fixing a MOS tube using a terminal block and a lower plastic part according to claim 1, characterized in that: The support bar (5) is made of plastic.

6. The structure for fixing a MOS tube using a terminal block and a lower plastic part according to claim 1, characterized in that: The MOS tubes (2) are distributed on both sides of the screw (6).

7. The structure for fixing a MOS tube using a terminal block and a lower plastic part according to claim 1, characterized in that: The wiring seat (1) is provided with a through hole for the screw (6) to pass through, and pressure feet (7) in contact with the circuit board (3) are respectively provided on both sides of the through hole.

8. The structure for fixing a MOS tube using a terminal block and a lower plastic part according to claim 7, characterized in that: When the presser foot (7) contacts the circuit board (3), a gap is left between the inner end of the through hole and the circuit board (3).

Images