CN110145520B - Expansion connecting piece - Google Patents
Expansion connecting piece Download PDFInfo
- Publication number
- CN110145520B CN110145520B CN201910534168.3A CN201910534168A CN110145520B CN 110145520 B CN110145520 B CN 110145520B CN 201910534168 A CN201910534168 A CN 201910534168A CN 110145520 B CN110145520 B CN 110145520B
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- China
- Prior art keywords
- expansion
- nut
- expansion part
- hole
- pushing
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- 238000009434 installation Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 241000587161 Gomphocarpus Species 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B12/00—Jointing of furniture or the like, e.g. hidden from exterior
- F16B12/10—Jointing of furniture or the like, e.g. hidden from exterior using pegs, bolts, tenons, clamps, clips, or the like
- F16B12/12—Jointing of furniture or the like, e.g. hidden from exterior using pegs, bolts, tenons, clamps, clips, or the like for non-metal furniture parts, e.g. made of wood, of plastics
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
- F16B13/04—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front
- F16B13/06—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve
- F16B13/063—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve by the use of an expander
- F16B13/066—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve by the use of an expander fastened by extracting a separate expander-part, actuated by the screw, nail or the like
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
Abstract
The invention discloses an expansion connecting piece, which comprises a lifting screw, a first nut, a second nut and an expansion sleeve, wherein the expansion sleeve is provided with a first expansion part, a second expansion part and an adjusting part, the lifting screw comprises a screw and a head part, the first nut and the second nut are sleeved on the screw, the first nut is arranged in the first expansion part, the second nut is arranged in the second expansion part, the first nut moves axially to expand or shrink and reset the first expansion part, the second nut moves axially to expand or shrink and reset the second expansion part, the head part of the lifting screw is arranged in an accommodating cavity of the adjusting part, a radial adjusting hole is formed in the side wall of the adjusting part, the accommodating cavity is communicated with the adjusting hole, gear teeth extending axially are arranged on the end face of the head part of the lifting screw, the gear teeth are uniformly arranged at intervals along the circumferential direction of the head part, and a tooth groove is formed between two adjacent gear teeth. Compared with the prior art, the invention has the advantages that: simple structure, easy installation and repeated disassembly and assembly.
Description
Technical Field
The invention relates to the technical field of fasteners, in particular to an expansion connecting piece.
Background
The eccentric connecting piece for connecting the plate-type furniture in the prior art is generally composed of an eccentric wheel, a connecting rod and embedded nuts, and is also called as a three-in-one connecting piece, and can be used for connecting a side plate (a plate in the vertical direction) and a laminate (a plate in the horizontal direction), however, the eccentric connecting piece has a large number of parts and is complex to install.
There is a need for improvement.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to provide an expansion connecting piece which has a simple structure and is easy to install.
In order to achieve the above object, the following technical scheme is provided:
the utility model provides an expansion connecting piece, a serial communication port, including the lift screw rod, first nut, second nut and expansion sleeve, expansion sleeve is inside hollow tubular structure, be equipped with first expansion portion in proper order along expansion sleeve's axial, second expansion portion and regulation portion, the lift screw rod includes the screw rod and connects the head in screw rod one end, first nut, the second nut cover is on the screw rod, first nut, second nut and lift screw rod set up in expansion sleeve are inside, first nut sets up in first expansion portion, the second nut sets up in second expansion portion, thereby first nut and first expansion portion slide relatively along the axial and make first expansion portion expand or shrink reset, thereby second nut and second expansion portion slide relatively along the axial and make second expansion portion expand or shrink reset, be equipped with radial regulation hole on the lateral wall of regulation portion, the accommodation hole is linked together with the regulation hole, be equipped with along the axial extension's on the terminal surface of the head of lift screw rod, the teeth of a cogwheel are evenly spaced along the circumference of head sets up, form tooth's between two adjacent tooth's socket.
Preferably, the expansion sleeve comprises two involutory first bodies and two involutory second bodies, at least one positioning hole is arranged on the first bodies, positioning columns matched with the positioning holes are arranged on the second bodies, and the positioning columns are embedded into the positioning holes to enable the first bodies and the second bodies to be connected into a whole.
Preferably, the outer side wall of the expansion sleeve is also provided with a positioning plate.
Preferably, a limiting hole is formed in the middle of the positioning plate.
Preferably, a telescopic part is arranged between the first expansion part and the second expansion part, and the telescopic part is in a corrugated shape.
Preferably, the first expansion part is provided with at least one expansion block capable of expanding outwards, one end of the expansion block is connected with the side wall of the first expansion part, the opposite end of the expansion block is separated from the side wall of the first expansion part, the expansion block extends along the axial direction of the expansion sleeve, the second expansion part is provided with at least one expansion block capable of expanding outwards, one end of the expansion block is connected with the side wall of the second expansion part, the opposite end of the expansion block is separated from the side wall of the second expansion part, and the expansion block extends along the axial direction of the expansion sleeve.
Preferably, the outer wall of the expansion block is provided with lines for increasing the surface friction force.
Preferably, the outer surface of the first nut is provided with a pushing part for expanding the first expansion part, the pushing part is provided with a pushing surface, the shape of the inner hole of the first expansion part is matched with the shape of the pushing surface, the outer surface of the second nut is provided with a pushing part for expanding the second expansion part, the pushing part is provided with a pushing surface, and the shape of the inner hole of the second expansion part is matched with the shape of the pushing surface.
Preferably, the pushing surface of the first nut comprises a cylindrical surface and a conical surface with gradually larger diameter, the cylindrical surface is connected with one end with the largest diameter of the conical surface, the inner hole of the first expansion part comprises a cylindrical hole and a conical hole with gradually larger diameter, the cylindrical hole is connected with one end with the largest diameter of the conical hole, the outer surface of the first nut and the inner wall of the first expansion part slide relatively so as to expand or shrink the expansion part for resetting,
the pushing surface of the second nut comprises a cylindrical surface and a conical surface with a gradually-enlarged diameter, the cylindrical surface is connected with one end of the conical surface with the largest diameter, the inner hole of the second expansion part comprises a cylindrical hole and a tapered hole with the gradually-enlarged diameter, the cylindrical hole is connected with one end with the largest diameter of the tapered hole, and the outer surface of the second nut and the inner wall of the second expansion part slide relatively so as to expand or shrink the expansion part for resetting.
Preferably, the outer surface of the first nut is also provided with a limit bar extending along the axial direction, the inner hole wall of the first expansion part is provided with a limit groove matched with the limit bar, the limit bar is embedded into the limit groove,
the outer surface of the second nut is also provided with a limiting strip extending along the axial direction, the inner hole wall of the second expansion part is provided with a limiting groove matched with the limiting strip, and the limiting strip is embedded into the limiting groove.
By adopting the structure, compared with the prior art, the invention has the following advantages: the invention has simple structure, easy installation and repeated disassembly and assembly.
Drawings
FIG. 1 is an overall block diagram of an expansion joint according to the present invention;
FIG. 2 is a schematic view of an assembly of an expansion joint according to the present invention;
FIG. 3 is an exploded view of the expansion joint of the present invention;
FIG. 4 is an exploded view of an expansion sleeve and nut of the expansion joint of the present invention;
FIG. 5 is a schematic cross-sectional view of an expansion joint of the present invention before and after expansion;
FIG. 6 is a schematic view of the installation of an expansion joint of the present invention 1;
fig. 7 is a schematic view of the installation of the expansion joint of the present invention 2.
Detailed Description
Embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
Referring to fig. 1 to 7, the expansion joint provided by the invention comprises a lifting screw 2, a first nut 3, a second nut 4 and an expansion sleeve 1, wherein the expansion sleeve 1 is of a hollow cylinder structure, a first expansion part 11, a second expansion part 12 and an adjusting part 13 are sequentially arranged along the axial direction of the expansion sleeve 1, the lifting screw 2 comprises a screw 22 and a head 21 connected to one end of the screw, the screw 22 is provided with external threads, the first nut 3 and the second nut 4 are provided with internal threads matched with the external threads of the screw 22, the first nut 3 and the second nut 4 are in threaded connection with the screw 22, the first nut 3 and the second nut 4 are sleeved on the screw 22, the first nut 3, the second nut 4 and the lifting screw 2 are arranged in the expansion sleeve 1, the first nut 3 is arranged in the first expansion part 11, the second nut 4 is arranged in the second expansion part 12, the first nut 3 and the first expansion part 11 slide relatively along the axial direction to expand or shrink and reset the first expansion part 11, the second nut 4 and the second expansion part 12 slide relatively along the axial direction to expand or shrink and reset the second expansion part 12, a cylindrical accommodating cavity 131 is arranged in the adjusting part 13, the head 21 of the lifting screw 2 is arranged in the accommodating cavity 131, a radial adjusting hole 130 is arranged on the side wall of the adjusting part 13, the accommodating cavity 131 is communicated with the adjusting hole 130, the end surface of the head 21 of the lifting screw is provided with gear teeth 211 extending along the axial direction, the gear teeth 211 are uniformly arranged at intervals along the circumferential direction of the head 21, tooth grooves 210 are formed between two adjacent gear teeth 211, the tooth grooves 210 are used for being meshed with the screwdriver head of the cross screwdriver, the cross screwdriver head stretches into the adjusting hole 130, when the screwdriver is twisted, the head 21 of the screw rotates along with the cross screwdriver head, i.e. the longitudinal rotation of the cross-head is converted into a transverse rotation of the lifting screw 2. The lifting screw 2 rotates to move the first nut 3 and the second nut 4 toward the head 21 of the lifting screw, the first expansion portion 11 expands radially by the first nut 3, and the second expansion portion 12 expands radially by the second nut 4.
The expansion sleeve 1 comprises two involutory first bodies 1a and second bodies 1b, at least one positioning hole 16 is formed in each first body 1a, positioning columns 15 matched with the positioning holes are arranged on each second body 1b, and the positioning columns 15 are embedded into the positioning holes 16 to enable the first bodies 1a and the second bodies 1b to be connected into a whole.
The outer side wall of the expansion sleeve 1 is also provided with a positioning plate 17, and when the expansion connecting piece is inserted into the mounting hole of the side plate 01, the positioning plate 17 is matched with a positioning groove 010 at the front end of the mounting hole of the side plate 01 (or the laminate 02) to prevent the expansion sleeve of the expansion connecting piece from deflecting. The locating plate 17 is semicircular, and a limiting hole 170 is formed in the middle of the locating plate 17. The limiting holes 170 can be matched with screws to lock the expansion connector on the side plate 01 or the layer plate 02.
A bellows-like expansion part 14 is provided between the first expansion part 11 and the second expansion part 12, and the expansion part 14 has a bellows-like shape. When the expansion connector is used for locking the side plate 01 and the laminate 02, the telescopic part 14 plays a role in tightening two wood plates and preventing shaking.
The first expansion part 11 is provided with at least one first expansion block 111 capable of expanding outwards, one end of the first expansion block 111 being connected to the side wall of the first expansion part, the opposite end being separated from the side wall of the first expansion part, the first expansion block 111 extending in the axial direction of the expansion casing 1. In the present embodiment, the number of the first expansion blocks 111 is 4. The outer wall of the first expansion block 111 is provided with a grain for increasing the surface friction to increase the friction.
The second expansion part 12 is provided with at least one second expansion block 121 capable of expanding outwardly, one end of the second expansion block 121 is connected to the side wall of the second expansion part 12, the opposite end thereof is separated from the side wall of the second expansion part 12, and the second expansion block 121 extends in the axial direction of the expansion sleeve 1. In the present embodiment, the number of the second expansion blocks 121 is 4. The outer wall of the second expansion block 121 is provided with a grain for increasing the surface friction to increase the friction.
The outer surface of the first nut 3 is provided with an annular pushing part for expanding the first expansion part 11, the pushing part is provided with a pushing surface 31, and the shape of an inner hole of the first expansion part 11 is matched with the shape of the pushing surface 31.
The pushing surface of the first nut 3 comprises a cylindrical surface 312 and a conical surface 311 with a gradually enlarged diameter, the cylindrical surface 311 is connected with one end of the conical surface 311 with a largest diameter, the inner hole of the first expansion part 11 comprises a cylindrical hole 1102 and a conical hole 1101 with a gradually enlarged diameter, the cylindrical hole 1102 is connected with one end of the conical hole 1101 with a largest diameter, and the outer surface of the first nut 3 slides relative to the inner wall of the first expansion part 11 so as to enable the first expansion part 11 to expand or shrink and reset.
The outer surface of the second nut 4 is provided with an annular pushing part for expanding the second expansion part 12, the pushing part is provided with a pushing surface 41, and the shape of the inner hole of the second expansion part 12 is matched with the shape of the pushing surface 41.
The pushing surface 41 of the second nut 4 comprises a cylindrical surface 412 and a conical surface 411 with a gradually enlarged diameter, the cylindrical surface 412 is connected with one end of the conical surface 411 with the largest diameter, the inner hole of the second expansion part 12 comprises a cylindrical hole 1202 and a tapered hole 1201 with the gradually enlarged diameter, the cylindrical hole 1202 is connected with one end of the tapered hole 1201 with the largest diameter, and the outer surface of the second nut 4 slides relative to the inner wall of the second expansion part 12 so as to expand or shrink the second expansion part 12 for resetting.
The shape of the pushing surface 31 and the pushing surface 41 may be a circular arc surface or other suitable shape, in addition to the combination of a cylindrical surface and a conical surface as in the present embodiment.
The outer surface of the first nut 3 is also provided with a limiting strip 313 extending along the axial direction, the inner hole wall of the first expansion part is provided with a limiting groove 1103 matched with the limiting strip 313, the limiting strip 313 is embedded into the limiting groove 1103, and the limiting strip 313 can prevent radial deflection between the second nut 3 and the expansion sleeve 1.
The outer surface of the second nut 4 is also provided with a limiting strip 413 extending along the axial direction, the inner hole wall of the second expansion part 12 is provided with a limiting groove 1203 matched with the limiting strip 413, the limiting strip 413 is embedded into the limiting groove 1203, and the limiting strip 413 can prevent radial deflection between the second nut 4 and the expansion sleeve 1.
The assembly method of the expansion joint is as follows:
the first nut 3 and the second nut 4 are sleeved on the lifting screw 2, the lifting screw 2 provided with the first nut 3 and the second nut 4 is placed into an inner hole of the first body 1a (or the second body 1 b) of the expansion sleeve, the second body 1b is aligned and spliced with the first body 1a, the positioning column 15 is embedded into the positioning hole 16, and the end of the positioning column 15 is upsetted to form a nail head by a riveting machine, so that the first body 1a and the second body 1b are riveted into a whole.
The using method of the expansion connecting piece comprises the following steps:
(1) Corresponding mounting holes are respectively processed on a furniture side plate (plate in the vertical direction) 01 and a furniture layer plate (plate in the horizontal direction) 02;
(2) The first expansion part 11 of the expansion connecting piece is inserted into the mounting hole of the side plate 01, the positioning plate 17 is embedded into the positioning groove 010 at the front end of the mounting hole of the side plate 01, the mounting hole of the layer plate 02 is inserted into one end of the adjusting part 13, the cross screwdriver head of the screwdriver is inserted from the adjusting hole 130 by using the screwdriver, the cross screwdriver head of the screwdriver is screwed, the lifting screw 2 is driven to rotate, the first nut 3 and the second nut 4 are moved towards the head 21 of the lifting screw by the rotation of the lifting screw 2, the first expansion part 11 expands radially under the action of the first nut 3, the free end of the first expansion block 111 expands outwards, the second expansion part 12 expands radially under the action of the second nut 4, and the free end of the second expansion block 121 expands outwards, so that the side plate 01 and the layer plate 02 are locked;
(3) The lifting screw rod continues to rotate, the expansion part 14 of the expansion connecting piece can shrink and tighten the side plate 01 and the layer plate 02 together, and shaking between two wood plates is avoided.
When the lifting screw rotates reversely, the first nut 3 and the second nut 4 move to the opposite side of the head 21 of the lifting screw, the first expansion part 11 and the second expansion part 12 are contracted and reset, and the expansion connecting piece and the laminate 02 can be repeatedly assembled and disassembled.
The beneficial effects of the invention are as follows: the expansion connecting piece is of an integrated structure, when the expansion connecting piece is installed, the screwdriver of the cross screwdriver is used for extending into the installation hole of the laminate, the expansion connecting piece and the laminate 02 can be locked by twisting the cross screwdriver, the installation is convenient and quick, and the furniture is firmly and reliably spliced; the expansion connecting piece is hidden in the side plate and the laminate, the furniture is spliced and attractive, and the expansion connecting piece can be repeatedly disassembled and assembled.
The foregoing is merely exemplary of the present invention, and those skilled in the art should not be considered as limiting the invention, since modifications may be made in the specific embodiments and application scope of the invention in light of the teachings of the present invention.
Claims (7)
1. The expansion connecting piece is characterized by comprising a lifting screw rod, a first nut, a second nut and an expansion sleeve, wherein the expansion sleeve is of a hollow cylinder structure, a first expansion part, a second expansion part and an adjusting part are sequentially arranged along the axial direction of the expansion sleeve, the lifting screw rod comprises a screw rod and a head part connected to one end of the screw rod, the first nut and the second nut are sleeved on the screw rod, the first nut, the second nut and the lifting screw rod are arranged in the expansion sleeve, the first nut is arranged in the first expansion part, the second nut is arranged in the second expansion part, the first nut and the first expansion part slide relatively along the axial direction so as to enable the first expansion part to expand or shrink and reset, the second nut and the second expansion part slide relatively along the axial direction so as to enable the second expansion part to expand or shrink and reset, the adjusting part is provided with a containing cavity for containing the head part of the lifting screw rod, the side wall of the adjusting part is provided with radial adjusting holes, the containing cavity is communicated with the adjusting holes, the end faces of the head part of the lifting screw rod are provided with gear teeth extending along the axial direction, the gear teeth are uniformly arranged at intervals along the circumferential direction of the head part, the gear teeth are formed between two adjacent gear teeth,
the expansion sleeve comprises a first body and a second body which are in involution, at least one positioning hole is arranged on the first body, a positioning column matched with the positioning hole is arranged on the second body, the positioning column is embedded into the positioning hole to enable the first body and the second body to be connected into a whole,
the first expansion part is provided with at least one expansion block capable of expanding outwards, one end of the expansion block is connected with the side wall of the first expansion part, the opposite end of the expansion block is separated from the side wall of the first expansion part, the expansion block extends along the axial direction of the expansion sleeve, the second expansion part is provided with at least one expansion block capable of expanding outwards, one end of the expansion block is connected with the side wall of the second expansion part, the opposite end of the expansion block is separated from the side wall of the second expansion part, the expansion block extends along the axial direction of the expansion sleeve,
the outer surface of the first nut is provided with a pushing part used for expanding the first expansion part, the pushing part is provided with a pushing surface, the shape of the inner hole of the first expansion part is matched with that of the pushing surface, the outer surface of the second nut is provided with a pushing part used for expanding the second expansion part, the pushing part is provided with a pushing surface with alternate concave and convex surfaces, and the shape of the inner hole of the second expansion part is matched with that of the pushing surface.
2. The expansion joint of claim 1, wherein the outer sidewall of the expansion sleeve is further provided with a locating plate.
3. The expansion joint of claim 2, wherein the locating plate has a central limiting aperture.
4. The expansion joint according to claim 1, wherein a telescopic part is provided between the first expansion part and the second expansion part, and the telescopic part is bellows-shaped.
5. The expansion joint according to claim 1, wherein the outer wall of the expansion block is provided with a texture for increasing the surface friction.
6. The expansion joint according to claim 1, wherein the pushing surface of the first nut comprises a cylindrical surface and a conical surface with a gradually increasing diameter, the cylindrical surface is connected with one end with the largest diameter of the conical surface, the inner hole of the first expansion part comprises a cylindrical hole and a conical hole with a gradually increasing diameter, the cylindrical hole is connected with one end with the largest diameter of the conical hole, the outer surface of the first nut slides relative to the inner wall of the first expansion part so as to expand or shrink the expansion part for resetting,
the pushing surface of the second nut comprises a cylindrical surface and a conical surface with a gradually-enlarged diameter, the cylindrical surface is connected with one end of the conical surface with the largest diameter, the inner hole of the second expansion part comprises a cylindrical hole and a tapered hole with the gradually-enlarged diameter, the cylindrical hole is connected with one end with the largest diameter of the tapered hole, and the outer surface of the second nut and the inner wall of the second expansion part slide relatively so as to expand or shrink the expansion part for resetting.
7. The expansion joint according to any one of claims 1 to 5, wherein the outer surface of the first nut is further provided with a limit bar extending along the axial direction, the inner hole wall of the first expansion part is provided with a limit groove matched with the limit bar, the limit bar is embedded into the limit groove,
the outer surface of the second nut is also provided with a limiting strip extending along the axial direction, the inner hole wall of the second expansion part is provided with a limiting groove matched with the limiting strip, and the limiting strip is embedded into the limiting groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910534168.3A CN110145520B (en) | 2019-06-19 | 2019-06-19 | Expansion connecting piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910534168.3A CN110145520B (en) | 2019-06-19 | 2019-06-19 | Expansion connecting piece |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110145520A CN110145520A (en) | 2019-08-20 |
| CN110145520B true CN110145520B (en) | 2024-04-02 |
Family
ID=67595818
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910534168.3A Active CN110145520B (en) | 2019-06-19 | 2019-06-19 | Expansion connecting piece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110145520B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110513371A (en) * | 2019-09-12 | 2019-11-29 | 广州花都区乐思富科技有限公司 | A kind of expansion connector |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN110145520A (en) | 2019-08-20 |
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