PNP type switch transistor

Abstract

The utility model relates to the technical field of PNP type switch transistors, in particular to a PNP type switch transistor, which comprises a transistor, a fixing plate and a heat dissipation fan, fixing grooves are arranged on two sides outside the transistor, threaded holes are arranged inside the fixing grooves, a mounting groove penetrating through the fixing plate is arranged at the top end of the fixing plate, and the heat dissipation fan is arranged in the mounting groove. A mounting groove is formed in the fixing plate, a positioning plate is fixedly connected to the inner wall of the mounting groove, a cylindrical supporting leg is fixedly connected to the position, close to the edge, of the bottom end of the fixing plate, and a sliding block is slidably connected to the outer side of the supporting leg. The PNP switch transistor can be fixed among the four supporting legs from the outside through the sleeve and the auxiliary rod, and the supporting legs can be fixed on a circuit board through the suckers at the bottoms of the supporting legs, so that the transistor is stably fixed.

Description

Technical Field

[0001] The utility model relates to the technical field of PNP type switching transistors, in particular to a PNP type switching transistor. Background Art

[0002] The PNP switching transistor is a commonly used bipolar transistor, typically used in switching and amplifying circuits. Compared to the NPN switching transistor, the structure and operating principle of the PNP transistor are different. The PNP transistor is composed of two P-type semiconductor materials sandwiching an N-type semiconductor material. In the PNP transistor, the N-type region in the center of the P-type material is called the base region, while the P-type region is called the emitter and collector. When a forward bias voltage is applied between the emitter and the base, electrons are injected from the emitter into the base region. At the same time, the reverse bias voltage applied between the base region and the collector prevents electrons from flowing to the collector. The PNP switching transistor is mounted on a circuit board, and the pins at the bottom of the transistor are inserted into the holes in the circuit board to form a connection and fix the transistor.

[0003] After a PNP switching transistor is mounted on a circuit board, it is fixed only by pins at the bottom of the transistor. Therefore, when lateral extrusion occurs, the PNP switching transistor is easily dislodged from the circuit board or the pins are damaged. Furthermore, the length of the support rod providing external support for the PNP switching transistor cannot be adjusted according to actual needs. The external dimensions and fixing slot dimensions of different types of PNP switching transistors are different. Finally, the PNP switching transistor lacks a heat dissipation device. During long-term operation, the surface temperature of the PNP switching transistor will continue to rise. Therefore, a PNP-type switching transistor is proposed to address the above problems. Utility Model Content

[0004] The purpose of the present invention is to provide a PNP type switching transistor to solve the problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A PNP type switching transistor includes a transistor, a fixing plate and a heat dissipation fan, wherein fixing grooves are provided on both sides of the outside of the transistor, threaded holes are provided inside the fixing grooves, a mounting groove is provided at the top of the fixing plate and penetrates the fixing plate, a positioning plate is fixedly connected to the inner wall of the mounting groove, a cylindrical leg is fixedly connected to the bottom end of the fixing plate near the edge, a slider is slidably connected to the outside of the leg, a sleeve is fixedly connected to the outside of the slider, a secondary rod is slidably connected to the inside of the sleeve, one end of the secondary rod located inside the sleeve is fixedly connected to a circular plate, a damping ring is fixedly connected to the outside of the circular plate, an end of the secondary rod away from the sleeve is fixedly connected to a connecting plate with a hole, a suction cup is fixedly connected to the bottom end of the leg, and the outside of the heat dissipation fan is fixedly connected to the mounting plate.

[0007] Preferably, the mounting groove is circular, the number of positioning plates is four, and the angle between two adjacent positioning plates is ninety degrees.

[0008] Preferably, the connecting plate fits tightly in the fixing groove, and the center of the circular hole of the connecting plate and the center of the threaded hole are on a straight line.

[0009] Preferably, the diameter of the damping ring is larger than the diameter of the circular plate, and the diameter of the damping ring is smaller than the inner diameter of the sleeve, and the damping ring and the sleeve are in sliding connection.

[0010] Preferably, the mounting plate is fixed to the top of the positioning plate by bolts, and the number of the mounting plates is also four.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] 1. In the present invention, the PNP switching transistor can be fixed by providing a fixing plate, legs, sleeves, auxiliary rods, fixing grooves and threaded holes. The PNP switching transistor can be fixed between the four legs from the outside through the sleeves and auxiliary rods. The legs can be fixed to the circuit board through the suction cups at the bottom, forming a stable fixation for the transistor.

[0013] 2. In the present invention, different types of PNP switching transistors can be fixed by means of the provided sleeve, circular plate, damping ring and auxiliary rod. The auxiliary rod can be arbitrarily changed in position within the sleeve through the circular plate and damping ring, thereby changing the overall length of the support rod, and can fix different types of PNP switching transistors.

[0014] 3. In the present invention, the PNP switch transistor can be cooled from the top by providing a fixing plate, a mounting groove, a positioning plate, a heat dissipating fan and a mounting plate. The positioning plate and the mounting plate can be connected by bolts, so that the heat dissipating fan can be fixed in the mounting groove, and the heat dissipating fan can dissipate heat for the PNP switch transistor. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 For this utility model Figure 1 Schematic diagram of the structure at A;

[0017] Figure 3 This is a schematic diagram of the fixed plate structure of the utility model;

[0018] Figure 4 This is a schematic diagram of the installation of the auxiliary rod structure of the utility model;

[0019] Figure 5This is a schematic diagram of the casing structure of the utility model;

[0020] Figure 6 This is a schematic diagram of the fixed structure of the transistor of the present invention.

[0021] In the figure: 1. transistor; 2. fixing groove; 3. threaded hole; 4. fixing plate; 5. mounting groove; 6. positioning plate; 7. support leg; 8. slider; 9. sleeve; 10. circular plate; 11. damping ring; 12. auxiliary rod; 13. connecting plate; 14. suction cup; 15. cooling fan; 16. mounting plate. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0024] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0025] See also Figure 1-6 , the utility model provides a technical solution:

[0026] A PNP type switching transistor includes a transistor 1, a fixing plate 4 and a heat dissipation fan 15. Fixing grooves 2 are provided on both sides of the outside of the transistor 1, and threaded holes 3 are provided inside the fixing grooves 2. A mounting groove 5 is provided at the top of the fixing plate 4 and penetrates the fixing plate 4. A positioning plate 6 is fixedly connected to the inner wall of the mounting groove 5. A cylindrical support leg 7 is fixedly connected to the bottom end of the fixing plate 4 near the edge. A slider 8 is slidably connected to the outside of the support leg 7. A sleeve 9 is fixedly connected to the outside of the slider 8. A secondary rod 12 is slidably connected to the inside of the sleeve 9. The end of the secondary rod 12 located inside the sleeve 9 is fixedly connected to a circular plate 10. A damping ring 11 is fixedly connected to the outside of the circular plate 10. The end of the secondary rod 12 away from the sleeve 9 is fixedly connected to a connecting plate 13 with a hole. A suction cup 14 is fixedly connected to the bottom end of the support leg 7. The outside of the heat dissipation fan 15 is fixedly connected to a mounting plate 16.

[0027] The mounting groove 5 is circular, the number of positioning plates 6 is four, and the angle between two adjacent positioning plates 6 is ninety degrees; the connecting plate 13 fits tightly in the fixing groove 2, and the center of the circular hole of the connecting plate 13 and the center of the threaded hole 3 are on a straight line; the diameter of the damping ring 11 is larger than the diameter of the circular plate 10, and the diameter of the damping ring 11 is smaller than the inner diameter of the sleeve 9, and the damping ring 11 and the sleeve 9 are slidingly connected; the mounting plate 16 is fixed to the top of the positioning plate 6 by bolts, and the number of the mounting plates 16 is also four.

[0028] Working process: This device is used to fix and dissipate heat for the PNP switching transistor 1. An external power supply supplies power to the cooling fan 15 of the device. There are four fixing grooves 2 on the outside of the transistor 1. The fixing grooves 2 are provided with threaded holes 3 inside. The bottom end of the fixing plate 4 is fixedly connected to four cylindrical legs 7. The top of the fixing plate 4 is provided with a mounting groove 5. Four positioning plates 6 arranged at equal angles are fixedly connected inside the circular mounting groove 5. A slider 8 is slidably connected to the outside of the legs 7. A sleeve 9 is fixedly connected to the outside of the slider 8. The auxiliary rod 12 is connected to the circular plate 10 at one end and the circular plate 10 at the other end. The damping ring 11 on the outside of the plate 10 slides inside the sleeve 9, and a connecting plate 13 with a hole is fixedly connected to the other end of the auxiliary rod 12. There is a suction cup 14 at the bottom of the leg 7. The cooling fan 15 can be fixed on the top of the positioning plate 6 through the external mounting plate 16. When the transistor 1 needs to be fixed, first install the transistor 1 on the circuit board according to the installation requirements, fix the leg 7 of the fixing plate 4 and the suction cup 14 at the bottom of the leg 7 can be fixed on the circuit board. The transistor 1 is between the four legs 7. Adjust the adjusting bolt on the outside of the slider 8 to adjust the sleeve 9 and the auxiliary rod 12 to the appropriate position. The auxiliary rod 12 is pulled to a suitable height, so that the connecting plate 13 at one end of the auxiliary rod 12 fits tightly in the fixing groove 2, and the center of the circular hole on the connecting plate 13 and the center of the threaded hole 3 are in a straight line, and the fixing bolt is passed through the hole on the connecting plate 13 and screwed into the threaded hole 3, which can fix the transistor 1 in one direction. In the same way, the other three connecting plates 13 and the auxiliary rod 12 are pulled to the length, and then the transistor 1 is fixed. The mounting plate 16 outside the cooling fan 15 is pressed on the top of the positioning plate 6, and the two are fixed by bolts. The heat dissipation fan 15 can be fixed in the mounting groove 5. The entire device is stably fixed on the circuit board under the action of the suction cup 14 at the bottom of the leg 7. The transistor 1 can be stably fixed on the circuit board through the sleeve 9, the auxiliary rod 12, the connecting plate 13 and the threaded hole 3. When squeezed from the outside or pushed by external force, the transistor 1 will not be separated from the circuit board and can work stably. The external power supply supplies power to the heat dissipation fan 15. When the heat dissipation fan 15 works, it drives the air flow to cool the transistor 1 and prevent the transistor 1 from overheating after long-term work.

[0029] Any matters not described in detail in this specification are prior art known to those skilled in the art. Standard parts used in this utility model are commercially available, and special-shaped parts can be customized according to the description in the specification and the accompanying drawings. The specific connection methods of each part are all conventional means such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts, and equipment are all conventional models in the prior art, and the circuit connections use conventional connection methods in the prior art, which will not be described in detail here.

[0030] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A PNP type switching transistor, comprising a transistor (1), a fixing plate (4) and a heat dissipation fan (15), characterized in that: The transistor (1) is provided with fixing grooves (2) on both sides of its exterior, and a threaded hole (3) is provided inside the fixing groove (2). The top of the fixing plate (4) is provided with a mounting groove (5) that penetrates the fixing plate (4), and a positioning plate (6) is fixedly connected to the inner wall of the mounting groove (5). The bottom end of the fixing plate (4) is fixedly connected to a cylindrical leg (7) near the edge, and the outer side of the leg (7) is slidably connected to a slider (8), and the outer side of the slider (8) is fixedly connected to a sleeve (9), and the inner side of the sleeve (9) is slidably connected to a secondary rod (12), and one end of the secondary rod (12) located inside the sleeve (9) is fixedly connected to a circular plate (10), and the outer side of the circular plate (10) is fixedly connected to a damping ring (11), and the end of the secondary rod (12) away from the sleeve (9) is fixedly connected to a connecting plate with a hole (13), and the bottom end of the leg (7) is fixedly connected to a suction cup (14), and the outer side of the heat dissipation fan (15) is fixedly connected to a mounting plate (16).

2. A PNP switching transistor according to claim 1, characterized in that: The installation groove (5) is circular, the number of the positioning plates (6) is four, and the angle between two adjacent positioning plates (6) is ninety degrees.

3. The PNP switching transistor according to claim 1, wherein: The connecting plate (13) is tightly fitted in the fixing groove (2), and the center of the circular hole of the connecting plate (13) and the center of the threaded hole (3) are on a straight line.

4. The PNP switching transistor according to claim 1, wherein: The diameter of the damping ring (11) is larger than the diameter of the circular plate (10), and the diameter of the damping ring (11) is smaller than the inner diameter of the sleeve (9). The damping ring (11) and the sleeve (9) are in sliding connection.

5. The PNP switching transistor according to claim 1, wherein: The mounting plate (16) is fixed to the top end of the positioning plate (6) by means of bolts, and the number of the mounting plates (16) is also four.

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