CN116487346A - Fixing unit and heat dissipating device using same - Google Patents

Fixing unit and heat dissipating device using same Download PDF

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Publication number
CN116487346A
CN116487346A CN202310515738.0A CN202310515738A CN116487346A CN 116487346 A CN116487346 A CN 116487346A CN 202310515738 A CN202310515738 A CN 202310515738A CN 116487346 A CN116487346 A CN 116487346A
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CN
China
Prior art keywords
spring
screw sleeve
screw
notches
heat
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CN202310515738.0A
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Chinese (zh)
Inventor
蓝文基
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Asia Vital Components Co Ltd
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Asia Vital Components Co Ltd
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Application filed by Asia Vital Components Co Ltd filed Critical Asia Vital Components Co Ltd
Priority to CN202310515738.0A priority Critical patent/CN116487346A/en
Publication of CN116487346A publication Critical patent/CN116487346A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L23/00—Details of semiconductor or other solid state devices
    • H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
    • H01L23/40—Mountings or securing means for detachable cooling or heating arrangements ; fixed by friction, plugs or springs
    • H01L23/4006—Mountings or securing means for detachable cooling or heating arrangements ; fixed by friction, plugs or springs with bolts or screws
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L23/00—Details of semiconductor or other solid state devices
    • H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
    • H01L23/36—Selection of materials, or shaping, to facilitate cooling or heating, e.g. heatsinks
    • H01L23/367—Cooling facilitated by shape of device
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L23/00—Details of semiconductor or other solid state devices
    • H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
    • H01L23/40—Mountings or securing means for detachable cooling or heating arrangements ; fixed by friction, plugs or springs
    • H01L23/4006—Mountings or securing means for detachable cooling or heating arrangements ; fixed by friction, plugs or springs with bolts or screws
    • H01L2023/4075—Mechanical elements
    • H01L2023/4087—Mounting accessories, interposers, clamping or screwing parts

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)

Abstract

The invention relates to a fixing unit and a heat dissipating device using the same, wherein four corners of the heat dissipating device are assembled with a heat source by arranging a plurality of fixing units; the fixing unit is provided with a spring screw, a screw sleeve and a clamping spring piece, wherein the tail section of the spring screw is provided with a retaining ring for preventing the spring from falling off, and the spring screw is sleeved in the screw sleeve; the screw sleeve is provided with two notches, the snap spring piece is sleeved on the screw sleeve, one side of the snap spring piece extends upwards to form a pair of buckling pieces, and the buckling pieces extend into the notches to buckle the top ends of the springs so that the springs are in a compressed state in the sleeve; when the heat dissipation device is in close contact with the heat source for heat exchange, the spring can be released only by removing the buckling of the pair of buckling pieces on the spring through external force or foreign objects, so that the spring provides a uniform and synchronous downward pressure contact force of the heat dissipation device on the heat source.

Description

Fixing unit and heat dissipating device using same
Technical Field
The present invention relates to a fixing unit and a heat dissipating device using the same, and more particularly, to a fixing unit capable of providing synchronous and uniform downward force to prevent damage or thermal resistance caused by uneven contact stress between a bare die and the heat dissipating device, and a heat dissipating device using the same.
Background
In order to provide the high-performance computing capability of the electronic equipment, a high-performance high-power wafer is adopted, when the wafer is operated, quite high heat is generated, the exterior of the traditional operation wafer is provided with a packaging shell, the packaging shell wraps the wafer inside the wafer to protect the wafer from damage, and along with the improvement of the operation performance of the wafer, the wafer generates higher temperature than the traditional operation, and the heat dissipation and the heat conduction efficiency of the wafer are seriously influenced by the packaging shell packaged outside the wafer; most of the chips in the market are changed into bare crystal form for arrangement, but the bare crystal surface is not flat and is in convex arc form, and the unprotected shell leads to small heat exchange contact surface and low strength, so that the heat exchange contact surface is easy to be damaged and cracked when being combined with a heat dissipating device,
in addition, when the conventional heat dissipating device is fixed above the heat source (bare die), single locking points are adopted to be locked in sequence, so that the time points of each locking are not synchronous and are easy to generate contact inclination, the bare die cannot bear uneven pressure, and the problems of chip cracking, damage and the like are easy to occur.
Referring to fig. 6 and 7, a conventional heat dissipating device and die assembly is shown, the heat source a (die form) is set on a substrate D, copper columns B with internal threads are disposed at four corners of the substrate D corresponding to the outer side of the heat source a, four holes C3 are disposed at the positions of the heat dissipating device C corresponding to the copper columns B, and screw units C1 are respectively disposed on the heat dissipating device C, a spring C2 is sleeved outside the screw units C1, and when the heat dissipating device C and the heat source a are fastened, a screw-fastening operation is directly performed sequentially by a manual or mechanical arm operation on an electric screwdriver, so that each set screw can be fastened in place at a fast and direct time, and when the screw units C1 are fastened to fixed points one by one, the spring C2 sleeved on the screw units C1 is also supported in the direction of the heat source a, so that the heat source C1 is not uniformly stressed, and the heat source C1 is immediately broken due to the lack of the uneven stress, but the heat source a is easily damaged due to the fact that the heat source a is easily damaged (die C1 is completely and completely damaged due to the fact that the die C2 is not damaged by the stress is uniformly and completely fastened.
Moreover, the bare die is fragile, and as described above, the four corners of the bare die must be combined by simultaneously providing a bonding force with uniform downward pressure, if the downward pressing force cannot be provided by simultaneously providing an average force to the four corners of the bare die, the heat spreader or the heat dissipating device is easy to generate warpage, no complete adhesion or damage between the heat dissipating device and the heat source (bare die), and heat resistance is also easy to be formed, so that uneven heating or heat conduction failure can occur.
Therefore, how to improve the heat dissipation device, which can be completely and comprehensively synchronized, and provide even pressure to be tightly attached to the heat source, and how to provide the effects of maintaining proper bonding force between the bare die and the heat dissipation device, and repeatedly performing installation or adjustment, is a primary problem for industry.
Disclosure of Invention
Therefore, in order to effectively solve the above-mentioned problems, a main object of the present invention is to provide a fixing unit capable of simultaneously and synchronously providing an average pressing force and a heat dissipating device using the same, so as to effectively avoid the occurrence of cracking or chipping of the corners of the die computing unit caused by the prior locking of a single locking point.
To achieve the above object, the present invention provides a fixing unit, comprising:
the spring screw is provided with at least one clamping groove close to the lower end, a retaining ring is clamped in the clamping groove, a spring is arranged outside the spring screw in a penetrating mode, and one end of the spring is abutted against the retaining ring;
the screw sleeve is provided with a first end and a second end which are open, a containing space is communicated between the first end and the second end, two notches are arranged at intervals at the first end of the screw sleeve, a step part is arranged at two sides of the opening of the notch, and the spring screw is arranged in the containing space of the screw sleeve;
the clamping spring piece is provided with an inner hole, the clamping spring piece is sleeved outside the screw sleeve through the inner hole, one side of the clamping spring piece upwards extends to form a pair of buckling pieces, a bending part is formed towards the inner hole direction and then extends to form a tail end, the bending part is propped against the step part, a hole is formed in the buckling pieces respectively, and the tail ends of the buckling pieces extend into the accommodating space of the sleeve from the notch of the sleeve to clamp one end of the spring.
The fixing unit, wherein: the outer edge of the screw sleeve is connected with the lower part of the notch and is provided with a sleeving part which is used for sleeving the clamp spring piece, and an annular groove or an annular convex rib is formed at the sleeving part.
The fixing unit, wherein: the snap spring piece is provided with a fixed end and a free end, the fixed end is connected with the snap spring piece, the free end is formed at the tail end of the snap spring piece, and the left side and the right side of the fixed end of the snap spring piece, which are connected with the snap spring piece, are respectively provided with a small groove.
The fixing unit, wherein: the first end of the screw sleeve is provided with two notches which are arranged in a staggered way at intervals, the first end of the screw sleeve is correspondingly provided with the two notches, a pair of arc-shaped flanges radially extend towards the screw sleeve, the arc-shaped flanges are correspondingly arranged at intervals at 180 degrees, the notches penetrate through the inner wall surface and the outer wall surface of the screw sleeve and simultaneously extend upwards to the arc-shaped flanges to form an axial guide rail, and the notches are correspondingly provided with a first position and a second position in the axial direction of the screw sleeve.
The fixing unit, wherein: the release piece is provided with a body, the body is provided with an outer wall surface and an inner wall surface, the body is provided with two outward expansion supporting parts, the two outward expansion supporting parts can penetrate through holes of the buckle piece, the two outward expansion supporting parts are respectively provided with an extension section, the two extension sections are arranged at 180-degree corresponding intervals, the two extension sections are formed by axially extending the outer wall surface along the edge of the body, and the tail ends of the extension sections obliquely extend to the central direction of the body for an inclined section.
The fixing unit, wherein: the release piece is also provided with two axial guide parts which are staggered with the two outward expansion propping parts, each axial guide part is provided with a vertical section which is arranged at a corresponding interval of 180 degrees, the two vertical sections are formed by extending the edge of the inner wall surface along the axial direction below the body, and a limiting section is arranged at the tail end of each vertical section in an outward extending mode.
A heat sink having a fixing unit, comprising:
the heat dissipation device comprises a heat dissipation device body, a heat dissipation device and a heat dissipation device, wherein the heat dissipation device body is provided with a first side, a second side and a heat receiving area, four corners outside the heat receiving area are provided with a plurality of through holes, and the plurality of through holes penetrate through the first side and the second side;
the fixing units are correspondingly arranged at the through holes of the heat dissipating device body, and the fixing units comprise:
the spring screw is provided with at least one clamping groove close to the lower end, a retaining ring is clamped in the clamping groove, a spring is arranged outside the spring screw in a penetrating mode, and one end of the spring and one side surface of the retaining ring are respectively attached to the first side and the second side of the heat dissipation device body;
the screw sleeve is provided with a first end and a second end which are open, a containing space is communicated between the first end and the second end, two notches are arranged at intervals at the first end of the screw sleeve, a step part is arranged at two sides of the opening of the notch, and the spring screw is arranged in the containing space of the screw sleeve;
the clamping spring piece is provided with an inner hole, the clamping spring piece is sleeved outside the screw sleeve through the inner hole, one side of the clamping spring piece upwards extends to form a pair of buckling pieces, a bending part is formed in the direction of the inner hole, the bending part is erected on the step part, a hole is formed in the buckling pieces respectively, and the tail ends of the buckling pieces extend into the accommodating space of the sleeve from the notch of the sleeve to clamp one end of the spring for axial limiting.
The heat dissipating device with the fixing unit, wherein: the outer edge of the screw sleeve is connected with the lower part of the notch and is provided with a sleeving part which is used for sleeving the clamp spring piece, and an annular groove or an annular convex rib is formed at the sleeving part.
The heat dissipating device with the fixing unit, wherein: the snap spring piece is provided with a fixed end and a free end, the fixed end is connected with the snap spring piece, the free end is formed at the tail end of the snap spring piece, and the left side and the right side of the snap spring piece, which are connected with the fixed ends of the snap spring piece, are respectively provided with a small groove.
The heat dissipating device with the fixing unit, wherein: the first end of the screw sleeve is provided with two notches which are arranged in a staggered way at intervals, the first end of the screw sleeve is correspondingly provided with a pair of arc-shaped flanges which extend towards the screw sleeve in the radial direction at the positions of the two notches, the pair of arc-shaped flanges are correspondingly arranged at intervals at 180 degrees, the notches penetrate through the inner wall surface and the outer wall surface of the screw sleeve and extend upwards to the arc-shaped flanges to form an axial guide rail, and the notches are correspondingly provided with a first position and a second position in the axial direction of the screw sleeve.
The heat dissipating device with the fixing unit, wherein: the release piece is provided with a body, the body is provided with an outer wall surface and an inner wall surface, the body is provided with two outward expansion supporting parts, the two outward expansion supporting parts can penetrate through holes of the buckle piece, the two outward expansion supporting parts are respectively provided with an extension section, the two extension sections are arranged at 180-degree corresponding intervals, the two extension sections are formed by axially extending the outer wall surface along the edge of the body, and the tail ends of the extension sections obliquely extend to the central direction of the body for an inclined section.
The heat dissipating device with the fixing unit, wherein: the release piece is also provided with two axial guide parts which are staggered with the two outward expansion propping parts, each axial guide part is provided with a vertical section which is arranged at a corresponding interval of 180 degrees, the two vertical sections are formed by extending the edge of the inner wall surface along the axial direction below the body, and a limiting section is arranged at the tail end of each vertical section in an outward extending mode.
The heat dissipating device with the fixing unit, wherein: the screw sleeve is integrally formed by extending the first side of the heat dissipating device body.
The invention has the advantages that: after the heat-radiating device body is heated to correspond to the heat-generating source, one end of the external thread is arranged on the spring screw of the fixing unit and is in primary pre-screwing combined positioning with the substrate loaded with the heat-generating source, at the moment, the springs are still in a compressed state in the inner space of the screw sleeve, after the fixing units of four corners are all in the pre-screwing locking position, a pair of buckling pieces of the clamping spring piece can be outwards stretched towards the outer side direction of the screw sleeve by operating the release piece through the outwards-expanding propping part, so that the buckling pieces can be simultaneously removed to clamp the top end of the springs, the springs can further provide synchronous and uniform downward pressing force for the four corners of the heat-radiating device body, the heat-generating source (bare die) can be stably and closely contacted, and the situation that corners are broken or burst or thermal resistance is generated due to incomplete adhesion is avoided, and the situation that the heat-generating source (bare die) is burst and damaged due to overlarge pressure in the screwing process is avoided.
Drawings
FIG. 1 is an exploded perspective view of a stationary unit of the present invention;
FIG. 2 is a sectional view of a combination of the fixing units of the present invention;
FIG. 3 is a sectional view of a combination of the fixing units of the present invention;
FIG. 4 is a schematic view of a stationary unit of the present invention;
FIG. 5 is a schematic diagram illustrating the combined operation of the heat dissipating device according to the present invention;
FIG. 6 is a schematic diagram of a conventional heat spreader and die assembly;
fig. 7 is a schematic diagram of a conventional heat spreader and die combination.
Reference numerals illustrate: a fixing unit 1; a spring screw 11; an upper end 11A; a lower end 11B; a nut 112; an external thread 113; a card slot 114; a spring 12; a tip 121; a bottom end 122; a screw sleeve 13; a first end 13A; a second end 13B; the accommodation space 13C; a notch 131; a cutout 132; a socket 133; a step 134; an arcuate flange 135; a clip spring member 14; an inner bore 141; a cleat 142; a bending portion 142A; a fixed end 1421; a free end 1422; a button piece 143; a bending portion 143A; a fixed end 1431; a free end 1432; a hole 144; a hole 145; a small groove 146; a release member 15; an outer wall surface 15A; an inner wall surface 15B; a body 151; an axial guide 152; a vertical section 1521; a limit segment 1522; hook end 1521; an outer expanding jack 153; an extension 1531; a sloped section 1532; a clasp 16; a heat dissipating device body 2; a first side 21; a second side 22; a heated region 23; a perforation 24; a heat source 3; a fixed structure 4; a device 5; a jig 6; a top brace 61; a first position A; a second position B; a distance E; an outer diameter F; pitch G.
Detailed Description
The above objects of the present invention, as well as the structural and functional characteristics thereof, will be described in terms of the preferred embodiments of the present invention as illustrated in the accompanying drawings.
Referring to fig. 1, 2 and 3, which are respectively a three-dimensional combination and an exploded view of a fixing unit of the present invention, as shown in the drawings, a fixing unit 1 of a heat dissipating device of the present invention includes: a spring screw 11, a screw sleeve 13, a snap spring element 14 and a release element 15;
the spring screw 11 has an upper end 11A and a lower end 11B, the upper end 11A and the lower end 11B have a nut 112 and a plurality of external threads 113, respectively, the spring screw 11 has at least one clamping groove 114 above the external threads 113, the clamping groove 114 is annularly and radially recessed outside the spring screw 11, the clamping groove 114 is provided with a retaining ring 16, a spring 12 is sleeved between the clamping groove 114 of the spring screw 111 and the nut 112, the spring 12 has a top end 121 and a bottom end 122, the bottom end 122 is abutted against an upwardly facing side surface of the retaining ring 16, and the retaining ring 16 provides axial limitation of the spring 12 to prevent the spring 12 from falling off from the lower end 11B of the spring screw 11, and the retaining ring 16 is a C-shaped retaining ring, an E-shaped retaining ring or other retaining ring, which is an example, but not limited thereto.
The upper and lower ends of the screw sleeve 13 are respectively provided with a first end 13A and a second end 13B which are open, and a containing space 13C is communicated between the first end 13A and the second end 13B, the first end 13A of the screw sleeve 13 is provided with two notches 131 and two notches 132 at annular intervals, the two notches 131 and the two notches 132 are arranged at intervals in a staggered manner (a cross shape is formed between the two notches), a sleeving part 133 is arranged at the lower part of the outer edge of the first end 13A of the screw sleeve 13 near the bottom of the notch 132, and an annular groove or an annular convex rib can be formed at the sleeving part 133 (region), thereby providing the axial positioning of the snap spring element 14, preventing the snap spring element 14 from axially falling off or displacing relative to the screw sleeve 13, and the spring screw 11 is sleeved in the containing space 13C of the screw sleeve 13.
The snap spring 14 is a ring body with an inner hole 141, and is sleeved on the sleeve connection portion 133 of the screw sleeve 13 through the inner hole 141, and the inner hole 141 of the snap spring 14 and the screw sleeve 13 can be combined in a loose fit or tight fit manner, which is taken as an illustration in the embodiment, but not limited to the embodiment. The snap ring 14 extends upward from the edge of the ring body to form a pair of elastic tabs 142, 143, the pair of tabs 142, 143 are disposed at 180 degrees relative to each other, the pair of tabs 142, 143 may be disposed in three or four or more corresponding annular spaces, the pair of tabs 142, 143 have a fixed end 1421, 1431 and a free end 1422, 1432, respectively, the fixed end 1421, 1431 is fixedly or integrally connected to the edge of the ring body of the snap ring 14, the pair of tabs 142, 143 form a bent portion 142A, 143A along the center direction of the inner hole 141 and further extend to form a distal end, and the free ends 1422, 1432 are formed at the distal ends of the pair of tabs 142, 143.
The first end 13A of the screw sleeve 13 is connected to two sides of the upper openings of the two notches 132, and has a step 134, and the pair of buckling pieces 142, 143 are bridged and erected at the step 134 toward the bent portions 142A, 143A in the screw sleeve 13, and the step 134 is used for supporting and leaning.
The pair of tabs 142, 143 are respectively provided with a hole 144, 145, the hole 144, 145 is formed between the fixed end 1421, 1431 and the free end 1422, 1432, and is closer to the free end 1422, 1432, the free end 1422, 1432 of the pair of tabs 142, 143 extends into the accommodating space 13C of the screw sleeve 13 from the notch 132 of the screw sleeve 13, so as to just hold the top end 121 of the spring 12, thereby limiting the upward axial release elasticity of the spring 12, i.e. temporarily making the top end 121 of the spring 12 unable to prop against the lower end of the nut 112 of the spring screw 11 in a compressed state, and the fixed end 1421, 1431 of the pair of tabs 142, 143 and the left and right sides of the ring body connected with the snap spring 14 are respectively provided with a small groove 146, and the arrangement of the small groove 146 can provide the pair of tabs 142, 143 with a larger bending angle and tear resistance.
The release member 15 has a body 151, the upper and lower ends of the body 151 are mutually communicated, the body 15 has an outer wall surface 15A and an inner wall surface 15B, the lower end of the body 151 is provided with two axial guiding portions 152 and two expanding supporting portions 153 in a spaced arrangement mode, and the two axial guiding portions 152 and the two expanding supporting portions 153 are arranged in a staggered and spaced arrangement mode.
The expanding top support 153 has an extending section 1531, the extending sections 1531 of the expanding top support 153 are disposed at 180 degrees corresponding to each other, the extending sections 1531 are formed by extending axially along the edge of the outer wall 15A of the main body 151, and an inclined section 1532 is formed by extending the end of the extending section 1531 obliquely toward the center of the main body 151, and a distance E is provided between the extending sections 1531 of the expanding top support, wherein the distance E is greater than or equal to the outer diameter F of the screw sleeve 13.
The two axial guiding portions 152 have two vertical sections 1521, the two vertical sections 1521 are disposed at 180 degrees corresponding to each other, the two vertical sections 1521 are formed by extending axially along the lower portion of the edge of the inner wall 15B of the main body 151, a limiting section 1522 is disposed at the end of the two vertical sections 1521 and extends outwards, and a gap G is provided between the two vertical sections 1521, and the gap G is smaller than or equal to the outer diameter F of the screw sleeve 13.
The first end 13A of the screw sleeve 13 has two notches 131, and a pair of arc-shaped flanges 135 radially extend to the screw sleeve 13, and the arc-shaped flanges 135 are disposed at 180 degrees with corresponding intervals. The notch 131 extends through the inner and outer wall surfaces of the screw sleeve 13 and also extends upwardly to the arcuate flange 135 to form an axial guide track.
The notch 131 has a first position a and a second position B corresponding to the axial direction of the screw sleeve 13, the first position a is located at the lower side of the notch 131 where the notch 131 is connected to the arc flange 135, the second position B is located at the lower end of the notch 131 where the notch 131 is connected to the screw sleeve 13, the first position A, B is the first end position of the axial guiding track, the axial guiding portion 152 and the notch 131 can be correspondingly axially slidably arranged, and the limiting section 1522 of the axial guiding portion 152 is blocked by the arc flange 135 to limit the axial displacement, so that the release member 15 is only limited between the first position A, B and the second position A, B of the notch 131 to move, preventing the release member 15 from falling off, and preventing the release member 15 and the screw sleeve 13 from rotating or shifting.
When the release member 15 moves axially toward the snap ring 14 and approaches, the flared propping portions 153 extend into the holes 145, 144 of the pair of tabs 142, 143, propping the pair of tabs 142, 143 outwardly, causing the pair of tabs 142, 143 to spread outwardly and abduct, thereby linking the free ends 1422, 1432 of the pair of tabs 142, 143 to move outwardly and abduct radially outward of the screw sleeve 13, causing the free ends 1422, 1432 of the pair of tabs 142, 143 to release the grip on the top end 121 of the spring 12, causing the spring 12 to be released from compression.
Please refer to fig. 3, 4 and 5, which are respectively a three-dimensional exploded and combined operation schematic diagram of the heat dissipating device according to the present invention, wherein the heat dissipating device according to the present invention comprises: a heat sink body 2, a plurality of fixing units 1;
the heat dissipating device body 2 has a first side 21, a second side 22 and a heated area 23, wherein four corners of the heated area 23 have a plurality of through holes 24, and the plurality of through holes 24 penetrate through the first side 21 and the second side 22 of the heat dissipating device body 2; the heat dissipating device body 2 may be a temperature equalizing plate or a heat sink or a heat conductor, and is not limited to the above description and illustration, and the structure of the fixing unit 1 in this embodiment will not be repeated here.
The fixing units 1 are formed by threading one ends of the spring screws 111 with external threads 113 from the through holes 24 of the heat sink body 2, then clamping the retaining ring 16 in the clamping groove 114 of the spring screws 111, wherein one upward side surface of the retaining ring 16 is attached to the second side 22 of the heat sink body 2, so that the spring screws 11 cannot be pulled out upwards from the through holes 24, the screw sleeves 13 are sleeved outside the spring screws 11, the second ends 13B of the lower ends of the screw sleeves 13 and the bottom ends 122 of the springs 12 are abutted against the surface of the first side 21 of the heat sink body 2, the screw sleeves 13 can also be formed by directly and integrally extending the first side 21 of the heat sink body 2, and other components are sequentially combined with the screw sleeves 13 in a plugging or sleeving manner.
The snap spring 14 is sleeved on the sleeved part 133 of the screw sleeve 13, and the top end 121 of the spring 12 is buckled by the free ends of the buckling sheets 142 and 143 of the snap spring 14, so that the spring 12 is temporarily compressed in the screw sleeve 13. At this time, the plurality of fixing units 1 are fixed on four corners of the heated area 23 of the heat dissipating device body 2, so that the fixing units 1 can be ensured not to fall off from the heat dissipating device body 2 during the moving process of the heat dissipating device body 2 before the heat dissipating device body 2 is assembled with the heat generating source, and meanwhile, the assembling speed and efficiency on the production line can be increased.
When the bare die heat source 3 is to be assembled with a heat sink and heat exchange is provided by the heat sink, the spring screw 11 disposed at the four corners outside the heated area 23 of the heat sink body 2 is preliminarily pre-locked and fixed with the fixing structure 4 (the stud with the internal thread) on the substrate loaded with the heat source 3 through the external thread 113, and at this time, the spring 12 sleeved outside the spring screw 11 in the sleeve has not released its elastic force, so the heat sink body 2 is only placed and positioned above the heat source 3, and no downward pressure is provided to the heat source 3, i.e. the surface (the second side 22) of the heated area 23 of the heat sink body 2 is only lightly touched against the surface of the heat source 3.
The fixing unit 1 provided by the invention can be used for carrying out installation operation in a manner of applying external force by mechanical equipment assistance automation or manually operating a hand tool by field personnel, but the installation operation is carried out by applying external force by mechanical equipment assistance in the embodiment, but the invention is not limited by the description, and external force assistance installation can be provided in other manners.
In this embodiment, a preset device 5 is used to provide a downward pressing force, the device 5 can directly provide the downward pressing force or be matched with a jig (not shown) to use, then the device 5 applies an external force to the release member 15, the device 5 has four supporting portions 51 corresponding to the fixing units 1 at the outer corners of the heated region 23 of the heat dissipation device body 2 respectively, the supporting portions 51 are simultaneously abutted against the upper ends of the release member 15, when the device 5 moves downward, the supporting portions 51 simultaneously press the release member 15 to force the release member 15 to approach the snap spring members 14 downward, and the expanding supporting portions 153 of the release member 15 correspondingly press into the holes of the fastening plates 142, 143 to force the fastening plates 142, 143 to move radially outwards towards the screw sleeves 13 so as to expand outwards, the free ends 2, 1432 of the pair of fastening plates 142, 143 can be detachably fastened to the top ends 121 of the springs 12, the springs 12 can release the complete elastic force of the springs 12 to press the fastening plates 14 downward, and the top ends of the fastening plates 12 are uniformly pressed against the bottom ends of the four fastening plates 12, and the bottom ends of the four fastening plates 12 are simultaneously arranged at the bottom ends of the fastening plates 2, and the fastening plates are simultaneously arranged at the bottom ends of the four fastening plates 12, and the bottom ends of the fastening plates are arranged at the bottom ends of the fastening plates 2, and the fastening plates are arranged at the bottom-down sides of the top-down device 12 are arranged on the top a lower unit 12 is arranged on the top a device 12 is a device is provided.
According to the invention, the spring screw 11 only prelocks the heat dissipating device body 2 above the heat generating source 3 and does not apply any pressure, the downward supporting force of the heat dissipating device body 2 to the heat generating source 3 is actually provided as the spring 12 arranged outside the spring screw 11 at four corners, and the springs 12 can provide synchronous and uniform downward pressing force to the four corners of the heat dissipating device body 2 by simultaneously releasing the limited spring 12 tension of the springs in the four fixing units 1 on the heat dissipating device body 2, so that the heat dissipating device body 2 and the heat generating source (bare die) can be stably and tightly contacted, the situation that corners are broken or cracked or thermal resistance is generated due to uneven stress, and the situation that the heat generating source (bare die) is cracked and damaged due to overlarge pressure in the screw locking process can be avoided, and the defects of uneven stress or uneven chip stress or direct crack damage caused by overlarge spring supporting force due to one-by-one locking of the existing single locking point are overcome.

Claims (13)

1. A stationary unit, comprising:
the spring screw is provided with at least one clamping groove close to the lower end, a retaining ring is clamped in the clamping groove, a spring is arranged outside the spring screw in a penetrating mode, and one end of the spring is abutted against the retaining ring;
the screw sleeve is provided with a first end and a second end which are open, a containing space is communicated between the first end and the second end, two notches are arranged at intervals at the first end of the screw sleeve, a step part is arranged at two sides of the opening of the notch, and the spring screw is arranged in the containing space of the screw sleeve;
the clamping spring piece is provided with an inner hole, one side of the clamping spring piece upwards extends to form a pair of buckling pieces through the outer part of the screw sleeve in a sleeved mode, the buckling pieces form a bending part towards the inner hole direction and then extend to form a tail end, the bending part is propped against the step part, holes are respectively formed in the buckling pieces, and the tail ends of the buckling pieces extend into the accommodating space of the sleeve from the notch of the sleeve to clamp one end of the spring.
2. The stationary unit of claim 1, wherein: the outer edge of the screw sleeve is connected with the lower part of the notch and is provided with a sleeving part which is used for sleeving the clamp spring piece, and an annular groove or an annular convex rib is formed at the sleeving part.
3. The stationary unit of claim 1, wherein: the snap spring piece is provided with a fixed end and a free end, the fixed end is connected with the snap spring piece, the free end is formed at the tail end of the snap spring piece, and the left side and the right side of the fixed end of the snap spring piece, which are connected with the snap spring piece, are respectively provided with a small groove.
4. The stationary unit of claim 1, wherein: the first end of the screw sleeve is provided with two notches which are arranged in a staggered way at intervals, the first end of the screw sleeve is correspondingly provided with the two notches, a pair of arc-shaped flanges radially extend towards the screw sleeve, the arc-shaped flanges are correspondingly arranged at intervals at 180 degrees, the notches penetrate through the inner wall surface and the outer wall surface of the screw sleeve and simultaneously extend upwards to the arc-shaped flanges to form an axial guide rail, and the notches are correspondingly provided with a first position and a second position in the axial direction of the screw sleeve.
5. The fixation unit of claim 1 or 4, wherein: the release piece is provided with a body, the body is provided with an outer wall surface and an inner wall surface, the body is provided with two outward expansion supporting parts, the two outward expansion supporting parts can penetrate through holes of the buckle piece, the two outward expansion supporting parts are respectively provided with an extension section, the two extension sections are arranged at 180-degree corresponding intervals, the two extension sections are formed by axially extending the outer wall surface along the edge of the body, and the tail ends of the extension sections obliquely extend to the central direction of the body for an inclined section.
6. The stationary unit of claim 5, wherein: the release piece is also provided with two axial guide parts which are staggered with the two outward expansion propping parts, each axial guide part is provided with a vertical section which is arranged at a corresponding interval of 180 degrees, the two vertical sections are formed by extending the edge of the inner wall surface along the axial direction below the body, and a limiting section is arranged at the tail end of each vertical section in an outward extending mode.
7. A heat sink having a fixing unit, comprising:
the heat dissipation device comprises a heat dissipation device body, a heat dissipation device and a heat dissipation device, wherein the heat dissipation device body is provided with a first side, a second side and a heat receiving area, four corners outside the heat receiving area are provided with a plurality of through holes, and the plurality of through holes penetrate through the first side and the second side;
the fixing units are correspondingly arranged at the through holes of the heat dissipating device body, and the fixing units comprise:
the spring screw is provided with at least one clamping groove close to the lower end, a retaining ring is clamped in the clamping groove, a spring is arranged outside the spring screw in a penetrating mode, and one end of the spring and one side surface of the retaining ring are respectively attached to the first side and the second side of the heat dissipation device body;
the screw sleeve is provided with a first end and a second end which are open, a containing space is communicated between the first end and the second end, two notches are arranged at intervals at the first end of the screw sleeve, a step part is arranged at two sides of the opening of the notch, and the spring screw is arranged in the containing space of the screw sleeve;
the clamping spring piece is provided with an inner hole, one side of the clamping spring piece upwards extends to form a pair of buckling pieces through the inner hole sleeved outside the screw sleeve, a bending part is formed in the direction of the inner hole by the pair of buckling pieces, the bending part is erected on the step part, a hole is formed in the pair of buckling pieces respectively, and the tail ends of the pair of buckling pieces extend into the accommodating space of the sleeve from the notch of the sleeve to clamp one end of the spring for axial limiting.
8. The heat sink with fixing unit according to claim 7, wherein: the outer edge of the screw sleeve is connected with the lower part of the notch and is provided with a sleeving part which is used for sleeving the clamp spring piece, and an annular groove or an annular convex rib is formed at the sleeving part.
9. The heat sink with fixing unit according to claim 7, wherein: the snap spring piece is provided with a fixed end and a free end, the fixed end is connected with the snap spring piece, the free end is formed at the tail end of the snap spring piece, and the left side and the right side of the snap spring piece, which are connected with the fixed ends of the snap spring piece, are respectively provided with a small groove.
10. The heat sink with fixing unit according to claim 7, wherein: the first end of the screw sleeve is provided with two notches which are arranged in a staggered way at intervals, the first end of the screw sleeve is correspondingly provided with a pair of arc-shaped flanges which extend towards the screw sleeve in the radial direction at the positions of the two notches, the pair of arc-shaped flanges are correspondingly arranged at intervals at 180 degrees, the notches penetrate through the inner wall surface and the outer wall surface of the screw sleeve and extend upwards to the arc-shaped flanges to form an axial guide rail, and the notches are correspondingly provided with a first position and a second position in the axial direction of the screw sleeve.
11. The heat sink with a fixing unit according to claim 7 or 10, characterized in that: the release piece is provided with a body, the body is provided with an outer wall surface and an inner wall surface, the body is provided with two outward expansion supporting parts, the two outward expansion supporting parts can penetrate through holes of the buckle piece, the two outward expansion supporting parts are respectively provided with an extension section, the two extension sections are arranged at 180-degree corresponding intervals, the two extension sections are formed by axially extending the outer wall surface along the edge of the body, and the tail ends of the extension sections obliquely extend to the central direction of the body for an inclined section.
12. The heat sink with fixing unit according to claim 11, wherein: the release piece is also provided with two axial guide parts which are staggered with the two outward expansion propping parts, each axial guide part is provided with a vertical section which is arranged at a corresponding interval of 180 degrees, the two vertical sections are formed by extending the edge of the inner wall surface along the axial direction below the body, and a limiting section is arranged at the tail end of each vertical section in an outward extending mode.
13. The heat sink with fixing unit according to claim 7, wherein: the screw sleeve is integrally formed by extending the first side of the heat dissipating device body.
CN202310515738.0A 2023-05-09 2023-05-09 Fixing unit and heat dissipating device using same Pending CN116487346A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310515738.0A CN116487346A (en) 2023-05-09 2023-05-09 Fixing unit and heat dissipating device using same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310515738.0A CN116487346A (en) 2023-05-09 2023-05-09 Fixing unit and heat dissipating device using same

Publications (1)

Publication Number Publication Date
CN116487346A true CN116487346A (en) 2023-07-25

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310515738.0A Pending CN116487346A (en) 2023-05-09 2023-05-09 Fixing unit and heat dissipating device using same

Country Status (1)

Country Link
CN (1) CN116487346A (en)

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