TWI905645B - Positioning device with heat dissipation effect - Google Patents

Abstract

This invention relates to a positioning device with heat dissipation effect, comprising a limiting mechanism, and an accommodating space provided inside the sleeve of the limiting mechanism, within which an adjustment part can be assembled. The outside of the sleeve is provided with a non-planar heat dissipation part. The adjustment part includes a connecting member and an elastic member sleeved on the connecting member. A connecting part is provided on one side of the connecting member, and an operating part is provided on the other side. By positioning the sleeve of the limiting mechanism axially outward at the connecting part, the connecting part on one side of the connecting member can be assembled at the connecting part on the connecting part of the connecting part. A first plate is then assembled at the connecting part of the base, and a second plate is assembled at the bottom of the sleeve, thus achieving the purpose of the sleeve of the limiting mechanism assisting the pre-set second plate in heat dissipation.

Description

Positioning device with heat dissipation effect

This invention provides a positioning device with heat dissipation effect, particularly a positioning device that assists in heat dissipation of a pre-set plate and its heat-generating components. It comprises a sleeve, connector, and elastic element of a limiting mechanism assembled on a base, which can be used to assemble pre-set first and second plates to achieve the purpose of assisting in heat dissipation of the pre-set plate and its heat-generating components.

Note: With the booming development of industrial technology, various industrial products such as computers, televisions, telephones, refrigerators, washing machines, wardrobes, drawers, and desks have long become indispensable items in people's lives. These industrial products are mostly assembled from multiple components, such as the outer casing of a computer motherboard, the circuit board and its heat sink inside a television casing, the desktop and supporting side panels of a desk, or board-to-board assembly between two opposing circuit boards. These components are mostly assembled using screws, allowing the industrial product to be disassembled into multiple parts for easy transportation. Subsequently, the assembled industrial product can be partially disassembled for repair or replacement.

Applications such as circuit boards and their heat sinks inside computer and television casings, or board-to-board assembly between two-phase circuit boards, require heat dissipation devices to assist in cooling the various electronic components (e.g., central processing units (CPUs), microprocessors, or chips) located on these circuit boards. These heat dissipation devices, mounted on the heat sinks, can be screwed onto the circuit board surrounding the heat sink. However, space must be left around the heat dissipation device for the screws to secure it. Without proper heat dissipation assistance, the cooling effect of the device will be affected, causing manufacturing difficulties and problems.

Furthermore, since the components of the aforementioned industrial products or circuit boards are assembled together using screws, components whose surfaces are pressed against by the screw heads often suffer dents, cracks, or other damage due to overtightening of the screws during assembly. To address this problem of component damage caused by screw connections, some manufacturers use welding to assemble the components. However, this design makes it difficult to disassemble some components after assembly, leading to difficulties in maintenance or component replacement.

Therefore, how to solve the problems and difficulties that currently arise when using screws for fastening, such as damage to the board material due to tightening, difficulty in disassembly and assembly, and the inconvenience and shortcomings of assembling on the board material, which affect the structure and performance of the board material, is the direction that manufacturers in this industry urgently want to research and improve.

Therefore, recognizing the aforementioned problems and shortcomings, the inventor collected relevant data, conducted extensive evaluations and considerations, and, drawing upon years of experience in this industry, continuously innovated and modified the design to finally create this patented positioning device with heat dissipation effect.

The main objective of this invention is to provide a heat-dissipating positioning device. The device comprises a receiving space within the sleeve of a limiting mechanism, within which an adjustment part can be assembled. The outer surface of the sleeve has a non-planar heat-dissipating part. This adjustment part includes a connecting member and an elastic member fitted onto the connecting member. A connecting part is provided on one side of the connecting member for assembly at the mating part of the base, and an operating part is provided on the other side of the connecting member. This allows for the assembly of a first positioning hole in the mating part of the base with a pre-set first plate, and the assembly of the bottom of the sleeve with a second positioning hole in the pre-set second plate. This facilitates the assembly and disassembly of the pre-set first and second plates, and further enables the sleeve of the limiting mechanism to assist in heat dissipation of the pre-set second plate.

Another objective of this invention is that the sleeve of the limiting mechanism is an integral, non-planar heat dissipation part on the outside. The heat dissipation part can be formed on the outside of the sleeve in various shapes, such as a plurality of rectangular plate-shaped fins in a symmetrical biaxial shape, a plurality of rectangular plate-shaped fins in a cross-shaped symmetrical shape, a plurality of arc-shaped plate-shaped fins in a polygonal symmetrical shape, a plurality of arc-shaped plate-shaped fins in a vortex shape, or a plurality of fins in a circular radial shape. The sleeve can be made of aluminum, copper, or their alloys, and the thermal conductivity of the sleeve can be between 70 and 500 W/m·K. Furthermore, the sleeve of the limiting mechanism includes an inner cylinder and a cover... The heat dissipation cylinder is located outside the inner cylinder. A non-planar heat dissipation section is formed on the outside of the heat dissipation cylinder. This heat dissipation section can be formed in various shapes, such as a plurality of rectangular plate-shaped fins in a bi-symmetrical shape, a plurality of rectangular plate-shaped fins in a cross-shaped symmetrical shape, a plurality of arc-shaped plate-shaped fins in a polygonal symmetrical shape, a plurality of arc-shaped plate-shaped fins in a vortex shape, or a plurality of circular radial fins. The inner cylinder and the heat dissipation cylinder can be made of aluminum, copper, or their alloys, and the thermal conductivity of both the inner cylinder and the heat dissipation cylinder can be between 70 and 500 W/m·K.

Another objective of this invention is that a stop portion is provided on the outer side of the accommodating space of the sleeve of the limiting mechanism, which can limit the position of the coupling member inside the accommodating space of the sleeve, allowing the coupling member to move vertically up and down within the accommodating space, and allowing the operating part on one side of the coupling member to protrude outside the stop portion. The stop portion is arc-shaped and inwardly tapered to form a narrow opening, thereby limiting the position of the coupling member within the accommodating space of the sleeve. The connecting part has a flange protruding from the outer side near the operating part, which can abut against the inner edge surface of the narrowed opening of the stop part. On the other side of the receiving space opposite the stop part is an assembly part with a pre-assembled second plate. This assembly part is an outwardly expanding annular structure that can be fitted or riveted, and has a through hole with a reduced diameter on one side near the receiving space of the assembly part. An inner shoulder is formed adjacent to the through hole and the receiving space.

Another objective of this invention is that the operating part on one side of the coupling of the limiting mechanism is the outer side of the stop portion that can be exposed to the receiving space of the sleeve, and the operating part includes a mating unit and an operating area. The mating unit of the operating part is for assembling at least one or more other positioning devices, and the other positioning device includes another limiting mechanism. The other limiting mechanism includes another sleeve and another adjusting part located inside the other sleeve. The other sleeve is provided with a mounting mechanism for assembling the other adjusting part. Another accommodating space has an external non-planar heat dissipation section. The other adjustment section includes another connector and another elastic member fitted onto the other connector. The other connector has another connecting portion on one side and another operating portion on the other side. This operating portion includes another mating unit and another operating area, allowing the other connecting portion on one side of the other connector to be aligned and assembled at the mating unit in the operating area of the operating portion. The other sleeve has another assembly portion that abuts against the stop portion.

Another objective of this invention is that the operating area of the operating part on one side of the coupling and the operating area of the other operating part of the other coupling can be various shapes such as star-shaped groove, square groove, hexagonal groove, or polygonal groove; and the space between the outer stop on one side of the accommodating space of the sleeve and the other assembly part of the other sleeve is for assembly into the third positioning hole of the predetermined third plate; the predetermined second plate can be a heat dissipation device, circuit board, or plate, etc., and the heat dissipation device includes a base plate abutting against the surface of a predetermined heating element provided on the predetermined first plate, and a plurality of heat dissipation fins formed on the surface of the base plate, etc.; the predetermined third plate can also be another heat dissipation device, circuit board, or plate, etc., and the other heat dissipation device includes another base plate abutting against the predetermined second plate, and a plurality of other heat dissipation fins formed on the surface of the other base plate, etc.

Another objective of this invention is that the base is assembled into a limiting mechanism, and one side of the base has a connecting portion for the sleeve of the limiting mechanism to align axially outward on the connecting portion. The base further includes a chassis body, a mating portion with a reduced outer diameter formed on the chassis body, and a connecting portion with a reduced outer diameter formed on the other side of the mating portion opposite to the chassis body. A pre-installed first plate can be assembled at the mating portion. The connection between the connecting portion on one side of the base and the connecting part on one side of the limiting mechanism can be a screw and screw hole, a pin and pin hole, or a taper and taper hole, etc., which are structures that can be assembled or disassembled.

1: Limiting Mechanism

11: Sleeve

110: Storage space

111: Heat Dissipation Section

1111: Fins

112: Stop section

1121: Narrowing the mouth

1122: Inner edge surface

113: Assembly Department

114: Through hole

115: Inner shoulder area

12: Adjustment Department

121: Connector

1211: Protruding flange

122: Elastic component

123: Connecting Part

124: Operations Department

125: Connecting Unit

126: Operating Area

13: Inner cylinder

14: Heat dissipation cylinder

2: Base

21: Connecting Section

22: Connecting part

23: Chassis

3: First board material

30: First positioning hole

31: Thermogenic Body

4: Second board material

40: Second positioning hole

41: Heat dissipation device

411: Base Plate

412: Heat dissipation fins

5: Another limiting mechanism

51: Another sleeve

510: Another accommodating space

511: Another heat dissipation section

52: Another adjustment section

521: Another component

522: Another elastic component

523: Another connecting part

524: Another operating unit

525: Another docking unit

526: Another operating area

527: Another Combination Unit

6: Third board material

60: Third positioning hole

61: Another heat dissipation device

611: Another base plate

612: Another heat dissipation fin

Figure 1 is a three-dimensional view of the first embodiment of this invention.

Figure 2 is an exploded perspective view of the first embodiment of this invention.

[Figure 3] is an exploded perspective view of the first embodiment of the present invention.

Figure 4 is an exploded side sectional view of the first embodiment of the present invention.

Figure 5 is a side sectional view of the first embodiment of the present invention.

Figure 6 is a perspective view of the application of the first embodiment of this invention.

[Figure 7] is a three-dimensional view (a) of a preferred embodiment of the sleeve of this invention.

Figure 8 is a three-dimensional view (II) of a preferred embodiment of the sleeve of this invention.

Figure 9 is a three-dimensional view (iii) of a preferred embodiment of the sleeve of this invention.

[Figure 10] is a three-dimensional view (four) of a preferred embodiment of the sleeve of this invention.

Figure 11 is a three-dimensional sectional view of Figure 10 of this invention.

Figure 12 is an exploded perspective view of the second embodiment of the present invention.

Figure 13 is an exploded perspective view of the second embodiment of the present invention.

Figure 14 is a side sectional view of the second embodiment of the present invention.

[Figure 15] is a perspective view of the application of the third embodiment of this invention.

Figure 16 is a side sectional view of the third embodiment of the present invention.

To achieve the aforementioned objectives and effects, the technical means, structure, and implementation methods employed in this invention are illustrated below with reference to preferred embodiments, and their features and functions are explained in detail to facilitate a complete understanding.

Please refer to Figures 1-11. As clearly shown in the figures, the positioning device with heat dissipation effect of this invention includes a limiting mechanism 1, wherein: the limiting mechanism 1 includes a sleeve 11, an adjusting part 12 located inside the sleeve 11, and the sleeve 11 has an accommodating space 110 for assembling the adjusting part 12, and an external non-planar heat dissipation part 111. The adjusting part 12 includes a connecting member 121 and an elastic member 122 sleeved on the connecting member 121. The connecting member 121 has a connecting part 123 on one side and an operating part 124 on the other side.

A base 2 can be disposed below the sleeve 11 relative to the limiting mechanism 1. The base 2 has a mating portion 21, and a connecting portion 22 is provided on one side of the mating portion 21, allowing the connecting portion 123 to be aligned and assembled at the connecting portion 22. The base 2 further includes a chassis body 23, a mating portion 21 with a reduced outer diameter formed on the chassis body 23, and a connecting portion 22 with a reduced outer diameter formed on the other side of the mating portion 21 relative to the chassis body 23. The first positioning hole 30 of the pre-set first plate 3 can be assembled at the mating portion 21.

The connecting portion 123 on one side of the coupling 121 of the limiting mechanism 1 of the present invention is assembled with the engaging portion 22 on one side of the base 2. The connecting portion 123 and the engaging portion 22 can be structures that can be assembled or disassembled, such as a screw and a screw hole, a pin and a pin hole, or a taper and a taper hole.

Furthermore, in the aforementioned limiting mechanism 1 of the present invention, the sleeve 11 can be an integral, non-planar heat dissipation part 111 on the outside. The heat dissipation part 111 can be a plurality of rectangular plate-shaped fins 1111 formed on the outside of the sleeve 11 in a symmetrical shape (see Figures 1, 2, 3, and 6), a plurality of rectangular plate-shaped fins 1111 formed on the outside of the sleeve 11 in a cross-shaped symmetrical shape (see Figure 7), or a polygonal symmetrical shape formed on the outside of the sleeve 11. The sleeve 11 can have various shapes, including a plurality of arc-shaped plate-like fins 1111, a plurality of arc-shaped plate-like fins 1111 formed in a vortex shape on the outside of the sleeve 11 (see also Figure 8), or a plurality of circular radial fins 1111 formed on the outside of the sleeve 11 (see also Figure 9), etc. The sleeve 11 can be made of aluminum, copper, or their alloys, and the thermal conductivity of the sleeve 11 can be between 70 and 500 W/m·K. Furthermore, the limiting mechanism 1... The sleeve 11 may further include an inner cylinder 13 and a heat dissipation cylinder 14 covering the outside of the inner cylinder 13 (see Figures 10 and 11 for reference). A non-planar heat dissipation portion 111 is formed on the outside of the heat dissipation cylinder 14. The heat dissipation portion 111 may be a plurality of rectangular plate-shaped fins 1111 formed on the outside of the heat dissipation cylinder 14 in a symmetrical shape, a plurality of rectangular plate-shaped fins 1111 formed on the outside of the heat dissipation cylinder 14 in a cross-shaped symmetrical shape, or a plurality of rectangular plate-shaped fins 1111 formed on the outside of the heat dissipation cylinder 14. 4. Various shapes can be used, such as a plurality of rectangular plate-shaped fins 1111 with a polygonal symmetrical shape on the outside, a plurality of rectangular plate-shaped fins 1111 with a vortex shape formed on the outside of the heat dissipation cylinder 14, or a plurality of circular radial fins 1111 formed on the outside of the heat dissipation cylinder 14. In this case, the inner cylinder 13 and the heat dissipation cylinder 14 can be made of aluminum, copper, or their alloys, and the thermal conductivity of the inner cylinder 13 and the heat dissipation cylinder 14 can be between 70 and 500 W/m·K.

Furthermore, in the aforementioned limiting mechanism 1 of the present invention, a stop portion 112 is provided on the outer side of one side of the accommodating space 110 of the sleeve 11. The stop portion 112 is arc-shaped and narrows inward from one side of the sleeve 11 to form a constriction 1121, which limits the position of the coupling member 121 inside the accommodating space 110 of the sleeve 11, allowing the coupling member 121 to move vertically within the accommodating space 110. The operating portion 124 of the coupling member 121 is exposed outside the constriction 1121 of the stop portion 112. Therefore, the coupling member 121 is positioned near the operating portion 124. A flange 1211 protrudes from the side and abuts against the inner edge 1122 of the constriction 1121 of the stop 112. On the other side of the accommodating space 110 opposite to the stop 112, there is an assembly part 113, providing a second positioning hole 40 for assembling a pre-set second plate 4. A through hole 114 with a reduced diameter is located near the accommodating space 110 of the assembly part 113. The assembly part 113 is an outwardly expanding annular structure for fitting or riveting. An inner shoulder 115 is formed adjacent to the through hole 114 and the accommodating space 110.

Furthermore, please refer to Figures 1-16. The adjusting part 12 of the limiting mechanism 1 of the present invention has an operating part 124 on one side of its connecting member 121 that is exposed outside the stop part 112 on one side of the receiving space 110 of the sleeve 11. The operating part 124 includes a mating unit 125 and an operating area 126. The mating unit 125 of the operating part 124 is for assembling at least one or more other positioning devices. These other positioning devices include another limiting mechanism 5 (please also refer to Figures 15 and 16). The other limiting mechanism 5 includes another sleeve 51 and another adjusting part 52 located inside the other sleeve 51. The other sleeve 51 has another receiving space 510 for assembling the other adjusting part 52. The exterior is provided with another non-planar heat dissipation part 511, and the other adjustment part 52 includes another connecting member 521 and another elastic member 522 sleeved on the other connecting member 521. The other connecting member 521 has another connecting part 523 on one side and another operating part 524 on the other side. The other operating part 524 includes another mating unit 525 and another operating area 526, allowing the other connecting part 523 on one side of the other connecting member 521 to be aligned and assembled at the mating unit 125 of the operating area 126 of the operating part 124. The other sleeve 51 has another assembly part 527 abutting against the stop part 112 on one side, which can be used to assemble at the third positioning hole 60 of the predetermined third plate 6.

Furthermore, the operating area 126 of the operating part 124 on one side of the aforementioned connector 121 and the operating area 526 of the other operating part 524 of the other connector 521 can be respectively shaped as star-shaped grooves, square grooves, hexagonal grooves, or polygonal grooves; and the outer stop 112 on one side of the accommodating space 110 of the sleeve 11 and the other assembly part 527 of the other sleeve 51 can be assembled at the third positioning hole 60 of the predetermined third plate 6; the predetermined second plate 4 is The heat dissipation device 41, circuit board, or plate material can be a heat dissipation device 41, etc. The heat dissipation device 41 includes a base plate 411 resting against the surface of a predetermined heat-generating element 31 on a predetermined first plate material 3, and a plurality of heat dissipation fins 412 formed on the surface of the base plate 411. The predetermined third plate material 6 can also be another heat dissipation device 61, circuit board, or plate material, etc. In this case, the other heat dissipation device 61 includes another base plate 611 resting against a predetermined second plate material 4, and a plurality of other heat dissipation fins 612 formed on the surface of the other base plate 611.

The mating portion 21 of the base 2 of the present invention can be assembled to the first positioning hole 30 of the first plate 3 by means of welding, fitting, or riveting. The assembly portion 113 of the sleeve 11 of the limiting 1 can also be assembled to the second positioning hole 40 of the second plate 4 by means of fitting or riveting. The other assembly portion 527 of the other sleeve 51 can also be assembled to the third positioning hole 60 of the third plate 6 by means of welding, fitting, or riveting.

The limiting mechanism 1 of the positioning device of the present invention can be assembled on the base 2. It can be assembled on the predetermined second plate 4, predetermined first plate 3 or predetermined third plate 6 by using at least one or more limiting mechanisms 1 and base 2 of the positioning device. The heat generated by the predetermined heating element 31 on the predetermined first plate 3 during operation can be quickly dissipated outward with the assistance of the predetermined second plate 4 or predetermined third plate 6. At the same time, the heat can also be dissipated by the sleeve 11 of at least one or more limiting mechanisms 1. The heat dissipation section 111 effectively increases the heat dissipation area and region, thereby assisting the pre-set first plate 3, pre-set second plate 4, or pre-set third plate 6 in heat dissipation and cooling. It also accelerates the dissipation of heat generated during operation from the pre-set heating element 31, pre-set first plate 3, pre-set second plate 4, or pre-set third plate 6, and enhances the structural strength of the assembly between the pre-set first plate 3, pre-set second plate 4, or pre-set third plate 6—all unexpected benefits.

The foregoing description is merely a preferred embodiment of the present invention and does not limit the scope of the patent. Therefore, any simple modifications and equivalent structural changes made using the description and drawings of the present invention should also be included within the scope of the patent and are hereby stated.

In conclusion, the aforementioned heat-dissipating positioning device of this invention effectively achieves its intended function and purpose during use. Therefore, this invention is a highly practical creation. To meet the requirements for an invention patent application, this application is hereby filed in accordance with the law. We respectfully request the patent committee to grant this application as soon as possible to protect the inventor's hard work. If the patent committee has any questions, please do not hesitate to contact us for guidance. The inventor will do their utmost to cooperate. Thank you for your assistance.

1: Limiting Mechanism

11: Sleeve

110: Storage space

111: Heat Dissipation Section

1111: Fins

112: Stop section

1121: Narrowing the mouth

1122: Inner edge surface

12: Adjustment Department

121: Connector

1211: Protruding flange

122: Elastic component

123: Connecting Part

124: Operations Department

125: Connecting Unit

126: Operating Area

2: Base

21: Connecting Section

22: Connecting part

23: Chassis

Claims (9)

A positioning device with heat dissipation effect includes a limiting mechanism, wherein: the limiting mechanism includes a sleeve and an adjusting part located inside the sleeve; the sleeve has an accommodating space for assembling the adjusting part inside and a non-planar heat dissipation part outside; the adjusting part includes a connecting member and an elastic member sleeved on the connecting member; the connecting member has a connecting part on one side and an operating part on the other side; the sleeve outside the accommodating space has an assembly part on one side, and the assembly part is an outwardly expanding annular structure that can be inserted or riveted. As described in claim 1, the positioning device with heat dissipation effect, wherein the sleeve of the limiting mechanism is an integral, non-planar heat dissipation part on the outside, is wherein the heat dissipation part comprises, respectively, a plurality of rectangular plate-shaped fins in a dihedral shape formed on two sides of the sleeve, a plurality of rectangular plate-shaped fins in a cross-shaped symmetrical shape formed on four sides of the sleeve, a plurality of rectangular plate-shaped fins in a polygonal symmetrical shape formed on the sleeve, a plurality of arc-shaped plate-shaped fins in a vortex shape formed on the sleeve, or a plurality of rectangular plate-shaped fins in a circular radial shape formed on the sleeve. The sleeve is made of aluminum, copper, or their alloy, and the thermal conductivity of the sleeve is between 70 and 500 W/m·K. As described in claim 1, the positioning device with heat dissipation effect includes an inner cylinder and a heat dissipation cylinder covering the outside of the inner cylinder. A non-planar heat dissipation portion is formed on the outside of the heat dissipation cylinder. This heat dissipation portion consists of a plurality of rectangular plate-shaped fins formed on two symmetrical sides of the outside of the heat dissipation cylinder, and a plurality of rectangular plate-shaped fins formed on four symmetrical cross-shaped sides of the outside of the heat dissipation cylinder. The inner cylinder and the heat dissipation cylinder are made of aluminum, copper, or their alloys, respectively, and the thermal conductivity of both is between 70 and 500 W/m·K. These fins are either polygonally symmetrical, vortex-shaped, or radially radiating. As described in claim 1, the positioning device with heat dissipation effect includes a stop portion on the outer side of the receiving space of the sleeve of the limiting mechanism, which limits the coupling to allow the coupling to move longitudinally up and down in the receiving space, and allows the operating part of the coupling to protrude outside the stop portion. The coupling has a flange portion protruding near the outer side of the operating part, abutting against the inner edge of the stop portion. On the outer side of the receiving space opposite the stop portion, there is an assembly portion for assembling a pre-set second plate, and a through hole with a reduced diameter is provided on the receiving space side near the assembly portion. An inner shoulder portion is formed adjacent to the through hole and the receiving space. As described in claim 4, the positioning device with heat dissipation effect, wherein the operating part of the coupling member of the limiting mechanism is located outside the stop portion on the side of the receiving space of the sleeve, and the operating part includes a docking unit and an operating area, and the docking unit of the operating part is for assembling at least one or more other positioning devices, the other positioning device including another limiting mechanism, and the other limiting mechanism including another sleeve and another adjusting part located inside the other sleeve, wherein the other sleeve is provided with a mounting mechanism for assembling the other positioning device. Another accommodating space of the adjustment part has an external non-planar heat dissipation part. This other adjustment part includes another connecting member and an elastic member fitted onto the other connecting member. The other connecting member has another connecting portion on one side and another operating part on the other side. The other operating part includes another mating unit and another operating area, allowing the other connecting portion on one side of the other connecting member to be aligned and assembled at the mating unit in the operating area of the operating part. The other sleeve has another assembly part that abuts against the stop portion on one side. As described in claim 5, the positioning device with heat dissipation effect, wherein the operating area of the operating part on one side of the coupling and the other operating area of the other operating part of the other coupling are respectively in the shape of a star-shaped groove, a square groove, a hexagonal groove, or a polygonal groove; and a predetermined third plate is assembled between the stop portion on one side of the receiving space of the sleeve and the other assembly portion of the other sleeve, wherein the predetermined third plate is another heat dissipation device, a circuit board, or a plate, and the other heat dissipation device includes another base plate abutting against the predetermined second plate and a plurality of other heat dissipation fins formed on the surface of the other base plate. As described in claim 5, the positioning device with heat dissipation effect includes a limiting mechanism with a base below the sleeve for mating assembly. The base includes a mating portion and a connecting portion located on one side of the mating portion for assembling the connecting portion on one side of the connector. The base further includes a chassis body, the mating portion with a reduced outer diameter formed on the chassis body, and a connecting portion with a reduced outer diameter formed on the other side of the mating portion opposite to the chassis body. A first plate is pre-installed at the mating portion. As described in claim 7, the positioning device with heat dissipation effect, wherein the preset second plate is a heat dissipation device, which includes a base plate abutting against the surface of a preset heat-generating element disposed on the preset first plate, and a plurality of heat dissipation fins formed on the surface of the base plate. As described in claim 7, in the heat-dissipating positioning device, the connecting portion on one side of the connector and the engagement portion on the side of the base are respectively a screw and a screw hole, a pin and a pin hole, or a taper and a taper hole.