CN111271350A - Anti-disassembly fastener - Google Patents
Anti-disassembly fastener Download PDFInfo
- Publication number
- CN111271350A CN111271350A CN202010202120.5A CN202010202120A CN111271350A CN 111271350 A CN111271350 A CN 111271350A CN 202010202120 A CN202010202120 A CN 202010202120A CN 111271350 A CN111271350 A CN 111271350A
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- Prior art keywords
- side wall
- shell
- degrees
- included angle
- detaching
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- 238000009434 installation Methods 0.000 claims description 29
- 230000003746 surface roughness Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 10
- 238000000034 method Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
Images
Classifications
-
- 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
- F16B2/00—Friction-grip releasable fastenings
-
- 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
- F16B37/00—Nuts or like thread-engaging members
-
- 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
- F16B41/00—Measures against loss of bolts, nuts, or pins; Measures against unauthorised operation of bolts, nuts or pins
- F16B41/005—Measures against unauthorised operation of bolts, nuts or pins
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing Of Electrical Connectors (AREA)
Abstract
The invention discloses an anti-disassembly fastener which comprises a shell provided with a cavity, wherein one end of the shell is provided with an opening; the mounting groove comprises a first side wall and a second side wall, one end of the first side wall 1 is connected with one end of the second side wall to form an included angle c, wherein c is more than or equal to 30 degrees and less than or equal to 90 degrees, one end of the first side wall is in contact with the top of the shell 4 to form an included angle a, wherein a is more than or equal to 30 degrees and less than or equal to 90 degrees, one end of the second side wall is in contact with the top of the shell to form an included angle b, wherein b is more than or equal to 120 degrees and less than or equal to 180 degrees, and the invention; compared with the prior art, the anti-disassembly device is simple in structure, low in cost, convenient to process and good in anti-disassembly effect.
Description
Technical Field
The invention relates to the field of fasteners, in particular to a disassembly-preventing fastener.
Background
The fastener is a mechanical part which is used for fastening connection and has extremely wide application. The fastener has wide application industries including energy, electronics, electrical appliances, machinery, chemical industry, metallurgy, dies, hydraulic pressure and the like, can be seen on various machines, equipment, vehicles, ships, railways, bridges, buildings, structures, tools, instruments, chemical industry, instruments, supplies and the like, is a mechanical basic part with the widest application range, and has the characteristics of various varieties and specifications and different performance and purposes.
The anti-theft nut with the publication number of CN1190162A comprises a nut core and a nut sleeve, wherein the nut core is provided with an internal thread hole for connecting with a screw rod, the nut sleeve is combined with the nut core by conical surfaces, and a one-way screw transmission pair is designed on the two combined conical surfaces, the structure has the greatest defect that certain axial pressure is required to be applied to the nut core when the nut sleeve is rotated, otherwise the nut core and the nut core are separated quickly, in addition, the conical surface screw pair is difficult to process, the punching processing is difficult to ensure the precision, the anti-theft nut with the publication number of CN2431437Y is provided with at least two ratchets at the outer end part, and the ratchets are rotated by using a special tool, the nut can be screwed tightly, the nut is complex in structure and high in manufacturing cost, and the anti-theft nut with the publication number of CN2506807Y is composed of a hexagon nut and a round nut. The two supporting surfaces in contact with each other are provided with two sawtooth teeth which are matched with each other, the hexagon nut is rotated in the forward direction, the round nut is screwed up by the sawtooth teeth, the hexagon nut is rotated in the reverse direction, and the round nut and the hexagon nut are locked by the inclined planes of the back surfaces of the sawtooth teeth; secondly, the device must twist round nut earlier on the work piece, then twist hexagon nut again, and the pretension of round nut relies on hexagon nut completely, because the uncertainty of spiral initiating terminal when processing, installation of screw thread, when hardly realizing that hexagon nut just twists and pastes with round nut surface is close, and the sawtooth tooth just coincide.
Therefore, compared with the prior art, the anti-disassembly fastener is simple in structure, low in cost, convenient to machine and good in anti-disassembly effect.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a disassembly-preventing fastener; compared with the prior art, the anti-disassembly device is simple in structure, low in cost, convenient to process and good in anti-disassembly effect.
The invention is realized by the following technical scheme: the invention discloses an anti-disassembly fastener which comprises a shell provided with a cavity, wherein one end of the shell is provided with an opening, the top of the shell is provided with at least two mounting grooves, the mounting grooves are arranged in a central symmetry mode by taking the center point of the top of the shell as a center, and one end of the shell is circular;
the mounting groove comprises a first side wall and a second side wall, one end of the first side wall 1 is connected with one end of the second side wall to form an included angle c, wherein c is more than or equal to 30 degrees and less than or equal to 90 degrees, one end of the first side wall is in contact with the top of the shell 4 to form an included angle a, wherein a is more than or equal to 30 degrees and less than or equal to 90 degrees, one end of the second side wall is in contact with the top of the shell to form an included angle b, and b is more; the invention designs a mounting tool in a matching way, the mounting tool comprises a dismounting block and a plate body, the surface of the plate body is fixedly provided with the dismounting block, the number of the dismounting blocks is the same as that of the mounting grooves, and the disassembly block is arranged corresponding to the installation groove, when the fastener of the invention is installed, the disassembly block is respectively abutted against a first side wall by using the installation tool, at the moment, the installation tool can not continuously rotate at the top of the shell, then force is applied to the plate body of the installation tool, at the moment, the shell rotates, the inner wall of the cavity of the shell is provided with a structure for connection, such as a thread, a clamping block and the like, therefore, the shell is connected with another structural member which is matched with the shell in the rotating process, when the shell needs to be disassembled, the installation tool needs to be rotated in the opposite direction, but the second side wall does not block the disassembly block, and the shell cannot move in the opposite direction, so that the installation tool cannot disassemble the shell.
Preferably, the first side wall is close to the fixed lug that is provided with in one side surface on casing top, dismantles this moment and corresponds with the lug and be provided with protruding position on the piece, when lug one end contacts the mounting groove bottom, laminating lug and first side wall, protruding position is located the lug below this moment, and with the lug contact, prevents to dismantle the piece and slide on first side wall, influences the efficiency of installation.
Preferably, the projection is semi-cylindrical.
Preferably, in order to increase the friction between the first side wall and the disassembly block, the surface of the first side wall is provided with a rough part, and the surface of the disassembly block is also subjected to rough treatment.
Preferably, in order to quickly determine the position between the detaching block and the first side wall, the middle part of the top of the shell is provided with a limiting hole. When the hand tool and the shell are installed, the limiting block is inserted into the limiting hole in the middle of the top of the shell, the disassembling block can be quickly abutted against the first side wall when the hand tool is rotated, and the hand tool is not easy to fall off from the shell.
The invention discloses a non-detachable fastener, compared with the prior art:
the invention has simple structure, simple production process and low production cost, when the fastener of the invention is installed, the installation tool is used to enable the disassembly blocks to respectively abut against one first side wall, at the moment, the installation tool can not continuously rotate at the top of the shell, then force is applied to the plate body of the installation tool, at the moment, the shell rotates, the inner wall of the cavity of the shell is provided with a screw thread, a clamping block and other structures for connection, thus the shell is connected with another structural member which is arranged in a matching way in the rotating process, when the shell needs to be disassembled, the installation tool needs to rotate in the opposite direction, but the second side wall does not block the disassembly blocks, the shell can not move in the opposite direction, thus the installation tool can not disassemble the shell, thereby achieving the effect of disassembly prevention.
Drawings
FIG. 1 is a schematic external view of the present invention;
FIG. 2 is a sectional view taken along A-A in example 1;
FIG. 3 is a sectional view taken along A-A in example 2;
FIG. 4 is a sectional view taken along the line A-A in example 3;
FIG. 5 is a sectional view taken along the line A-A in example 4;
FIG. 6 is a sectional view taken along the line A-A in example 5;
FIG. 7 is a sectional view in the A-A direction of example 6;
FIG. 8 is an enlarged view of a portion of FIG. 1 at A;
FIG. 9 is a schematic view of a structure inside the cavity of the housing;
FIG. 10 is a schematic view of an alternative configuration of the interior of the housing cavity;
FIG. 11 is a schematic view of the construction of the installation tool;
FIG. 12 is a schematic diagram of a hand tool configuration.
In the figure: 1. a first side wall; 2. a second side wall; 3. mounting grooves; 4. a housing; 11. a bump; 12. a roughened portion; 51. disassembling the block; 52. a plate body; 53. and a limiting block.
Detailed Description
The following examples are given for the detailed implementation and specific operation of the present invention, but the scope of the present invention is not limited to the following examples.
Example 1
As shown in fig. 1 and 2, embodiment 1 discloses a housing 4 having a cavity, one end of the housing 4 is provided with an opening, the top of the housing 4 is provided with two mounting grooves 3, the two mounting grooves 3 are arranged symmetrically around the center point of the top of the housing 4, and one end of the housing 4 is circular;
the mounting groove 3 comprises a first side wall 1 and a second side wall 2, one end of the first side wall 1 is connected with one end of the second side wall 2 to form an included angle c, wherein the included angle c is 60 degrees, one end of the first side wall 1 is in contact with the top of the shell 4 to form an included angle a, the included angle a is 90 degrees, one end of the second side wall 2 is in contact with the top of the shell 4 to form an included angle b, and the included angle b is 150 degrees; in example 1, the first side wall 1 is linear, and the second side wall 2 is also linear.
When the fastener is installed, the detaching block 51 is tightly abutted to one first side wall 1, the installing tool cannot continue to rotate at the top of the shell 4 at the moment, force is applied to the plate body 52 of the installing tool, the shell 4 rotates at the moment, the installation is completed, when the shell 4 needs to be detached, the installing tool needs to rotate in the opposite direction, but the second side wall 2 does not block the detaching block 51, the shell 4 cannot move in the opposite direction, and therefore the installing tool cannot detach the shell 4, and the anti-detachment effect is achieved.
Example 2
As shown in fig. 3, embodiment 2 discloses a housing 4 having a cavity, wherein an opening is formed at one end of the housing 4, two mounting grooves 3 are formed in the top of the housing 4, the two mounting grooves 3 are symmetrically arranged around the center point of the top of the housing 4, and one end of the housing 4 is circular;
the mounting groove 3 comprises a first side wall 1 and a second side wall 2, one end of the first side wall 1 is connected with one end of the second side wall 2 to form an included angle c, wherein the included angle c is 45 degrees, one end of the first side wall 1 is in contact with the top of the shell 4 to form an included angle a, the included angle a is 60 degrees, one end of the second side wall 2 is in contact with the top of the shell 4 to form an included angle b, and the included angle b is 165 degrees; in example 1, the first side wall 1 is linear, and the second side wall 2 is also linear.
When the fastener is installed, the detaching block 51 is tightly abutted to one first side wall 1, the installing tool cannot continue to rotate at the top of the shell 4 at the moment, force is applied to the plate body 52 of the installing tool, the shell 4 rotates at the moment, the installation is completed, when the shell 4 needs to be detached, the installing tool needs to rotate in the opposite direction, but the second side wall 2 does not block the detaching block 51, the shell 4 cannot move in the opposite direction, and therefore the installing tool cannot detach the shell 4, and the anti-detachment effect is achieved.
Example 3
As shown in fig. 4, embodiment 3 discloses a housing 4 having a cavity, wherein an opening is formed at one end of the housing 4, two mounting grooves 3 are formed in the top of the housing 4, the two mounting grooves 3 are symmetrically arranged around the center point of the top of the housing 4, and one end of the housing 4 is circular;
the mounting groove 3 comprises a first side wall 1 and a second side wall 2, one end of the first side wall 1 is connected with one end of the second side wall 2 to form an included angle c, wherein the included angle c is 90 degrees, one end of the first side wall 1 is in contact with the top of the shell 4 to form an included angle a, the included angle a is 90 degrees, one end of the second side wall 2 is in contact with the top of the shell 4 to form an included angle b, and the included angle b is 120 degrees; in example 1, the first side wall 1 is linear and the second side wall 2 is polygonal.
When the fastener is installed, the detaching block 51 is tightly abutted to one first side wall 1, the installing tool cannot continue to rotate at the top of the shell 4 at the moment, force is applied to the plate body 52 of the installing tool, the shell 4 rotates at the moment, the installation is completed, when the shell 4 needs to be detached, the installing tool needs to rotate in the opposite direction, but the second side wall 2 does not block the detaching block 51, the shell 4 cannot move in the opposite direction, and therefore the installing tool cannot detach the shell 4, and the anti-detachment effect is achieved.
Example 4
As shown in fig. 5, embodiment 4 discloses a housing 4 having a cavity, one end of the housing 4 is provided with an opening, the top of the housing 4 is provided with two mounting grooves 3, the mounting grooves 3 are arranged in a central symmetry manner around the center point of the top of the housing 4, and one end of the housing 4 is circular;
the mounting groove 3 comprises a first side wall 1 and a second side wall 2, one end of the first side wall 1 is connected with one end of the second side wall 2 to form an included angle c, wherein the included angle c is 60 degrees, one end of the first side wall 1 is in contact with the top of the shell 4 to form an included angle a, the included angle a is 60 degrees, one end of the second side wall 2 is in contact with the top of the shell 4 to form an included angle b, and the included angle b is 150 degrees; in example 1, the first side wall 1 is linear and the second side wall 2 is polygonal.
When the fastener is installed, the detaching block 51 is tightly abutted to one first side wall 1, the installing tool cannot continue to rotate at the top of the shell 4 at the moment, force is applied to the plate body 52 of the installing tool, the shell 4 rotates at the moment, the installation is completed, when the shell 4 needs to be detached, the installing tool needs to rotate in the opposite direction, but the second side wall 2 does not block the detaching block 51, the shell 4 cannot move in the opposite direction, and therefore the installing tool cannot detach the shell 4, and the anti-detachment effect is achieved.
Example 5
As shown in fig. 6, embodiment 5 discloses a housing 4 having a cavity, wherein an opening is formed at one end of the housing 4, two mounting grooves 3 are formed in the top of the housing 4, the two mounting grooves 3 are symmetrically arranged around the center point of the top of the housing 4, and one end of the housing 4 is circular;
the mounting groove 3 comprises a first side wall 1 and a second side wall 2, one end of the first side wall 1 is connected with one end of the second side wall 2 to form an included angle c, wherein the included angle c is 40 degrees, one end of the first side wall 1 is in contact with the top of the shell 4 to form an included angle a, the included angle a is 60 degrees, one end of the second side wall 2 is in contact with the top of the shell 4 to form an included angle b, and the included angle b is 160 degrees; in example 1, the first side wall 1 is linear and the second side wall 2 is curved.
When the fastener is installed, the detaching block 51 is tightly abutted to one first side wall 1, the installing tool cannot continue to rotate at the top of the shell 4 at the moment, force is applied to the plate body 52 of the installing tool, the shell 4 rotates at the moment, the installation is completed, when the shell 4 needs to be detached, the installing tool needs to rotate in the opposite direction, but the second side wall 2 does not block the detaching block 51, the shell 4 cannot move in the opposite direction, and therefore the installing tool cannot detach the shell 4, and the anti-detachment effect is achieved.
Example 6
As shown in fig. 7, embodiment 6 discloses a housing 4 having a cavity, wherein an opening is formed at one end of the housing 4, two mounting grooves 3 are formed in the top of the housing 4, the two mounting grooves 3 are symmetrically arranged around the center point of the top of the housing 4, and one end of the housing 4 is circular;
the mounting groove 3 comprises a first side wall 1 and a second side wall 2, one end of the first side wall 1 is connected with one end of the second side wall 2 to form an included angle c, wherein the included angle c is 65 degrees, one end of the first side wall 1 is in contact with the top of the shell 4 to form an included angle a, the included angle a is 90 degrees, one end of the second side wall 2 is in contact with the top of the shell 4 to form an included angle b, and the included angle b is 155 degrees; in example 1, the first side wall 1 is linear and the second side wall 2 is curved.
When the fastener is installed, the detaching block 51 is tightly abutted to one first side wall 1, the installing tool cannot continue to rotate at the top of the shell 4 at the moment, force is applied to the plate body 52 of the installing tool, the shell 4 rotates at the moment, the installation is completed, when the shell 4 needs to be detached, the installing tool needs to rotate in the opposite direction, but the second side wall 2 does not block the detaching block 51, the shell 4 cannot move in the opposite direction, and therefore the installing tool cannot detach the shell 4, and the anti-detachment effect is achieved.
As shown in fig. 8 to 11, the present invention designs an installation tool, the installation tool includes a detaching block 51 and a plate body 52, the surface of the plate body 52 is fixedly provided with the detaching block 51, the number of the detaching blocks 51 is the same as the number of the mounting grooves 3, and the detaching blocks 51 are arranged corresponding to the positions of the mounting grooves 3, when the fastener of the present invention is installed, the installation tool is used, the detaching blocks 51 are respectively abutted against one first side wall 1, at this time, the installation tool cannot rotate on the top of the housing 4, and then a force is applied to the plate body 52 of the installation tool, at this time, the housing 4 rotates, as shown in fig. 9, the inner wall of the cavity of the housing 4 is provided with a thread, as shown in fig. 10, the inner wall of the cavity of the housing 4 is provided with a clamping block, so that the housing 4 is connected with another structural member arranged in a mating manner during the, the mounting tool needs to be rotated in the opposite direction, but the second side wall 2 does not block the detaching block 51, the housing 4 cannot be moved in the opposite direction, and the mounting tool cannot detach the housing 4.
The fixed lug 11 that is provided with of one side surface that is close to the casing 4 top of first lateral wall 11, dismantle this moment and be provided with protruding position with lug 11 correspondence on the piece 51, when lug 11 one end contacted the mounting groove bottom, laminating lug 11 and first lateral wall 1, protruding position is located lug 11 below this moment, and with lug 11 contact, prevents to dismantle that piece 51 from sliding on first lateral wall 1, influences the efficiency of installation.
In order to increase the friction between the first side wall 1 and the detaching block 11, the surface of the first side wall 1 is provided with a rough part 12, and the surface of the detaching block 11 is also subjected to rough treatment.
As shown in fig. 12, in order to quickly determine the position between the detaching block 51 and the first side wall 1, a limiting hole is formed in the middle of the top of the housing 4, the invention further designs a hand tool in a matching manner, the mounting tool comprises the detaching block 51 and a plate body 52, the detaching block 51 is fixedly arranged on the surface of the plate body 52, the number of the detaching blocks 51 is the same as that of the mounting grooves 3, the detaching blocks 51 are arranged in correspondence to the positions of the mounting grooves 3, and the mounting tool and the hand tool are only characterized in that a limiting block 53 is fixedly arranged on the surface of the plate body 52, and the size and the position of the limiting block 53 are arranged in correspondence to the limiting hole in the middle of. When the hand tool and the shell 4 are installed, the limiting block 53 is inserted into the limiting hole in the middle of the top of the shell 4, the disassembling block 51 can be quickly abutted against the first side wall 1 when the hand tool is rotated, and the hand tool is not easy to fall off from the shell 4.
The invention is described above with reference to the accompanying drawings, it is obvious that the invention is not limited to the above embodiments, and it is within the scope of the invention to adopt various insubstantial modifications of the technical solution of the invention or to apply the concept and technical solution of the invention directly to other occasions without any modification.
Claims (9)
1. The disassembly-preventing fastener comprises a shell (4) with a cavity, wherein one end of the shell (4) is provided with an opening, and the disassembly-preventing fastener is characterized in that the top of the shell (4) is provided with at least two mounting grooves (3), the mounting grooves (3) are arranged in a central symmetry mode by taking the center point of the top of the shell (4), and one end of the shell (4) is circular;
the mounting groove (3) comprises a first side wall (1) and a second side wall (2), wherein the first side wall (1) and one end of the second side wall (2) are connected to form an included angle c, the c is more than or equal to 30 degrees and less than or equal to 90 degrees, one end of the first side wall (1) is in contact with the top of the shell (4) to form an included angle a, the a is more than or equal to 30 degrees and less than or equal to 90 degrees, one end of the second side wall (2) is in contact with the top of the shell (4) to form an included angle b, and the b is more than or equal to 120 degrees.
2. A removal-resistant fastener according to claim 1, wherein a projection (11) is fixedly provided on a side surface of the first side wall (11) adjacent to the top end of the housing (4).
3. A tamperproof fastener according to claim 2, characterized in that said projection (11) is semi-cylindrical.
4. A tamperproof fastener according to claim 3, characterized in that said first side wall (1) is provided with a surface roughness (12).
5. The disassembly-prevention fastener as claimed in claim 4, wherein a limit hole is formed in the middle of the top of the housing (4).
6. An installation tool for installing a fastener as claimed in any one of claims 1 to 4.
7. An installation tool as claimed in claim 6, characterized in that the installation tool comprises a detaching block (51) and a plate body (52), the plate body (52) is provided with detaching blocks (51) on the surface, the number of detaching blocks (51) is the same as that of the installing grooves (3), and the detaching blocks (51) are arranged corresponding to the positions of the installing grooves (3).
8. A hand tool for installing the fastener of claim 5.
9. The hand tool according to claim 8, wherein the hand tool comprises a detaching block (51) and a plate body (52), the surface of the plate body (52) is fixedly provided with the detaching block (51), the number of the detaching blocks (51) is the same as that of the mounting grooves (3), the detaching blocks (51) are arranged corresponding to the positions of the mounting grooves (3), the surface of the plate body (52) is fixedly provided with a limiting block (53), and the size and the position of the limiting block (53) are arranged corresponding to a limiting hole at the middle part of the top of the shell (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010202120.5A CN111271350A (en) | 2020-03-20 | 2020-03-20 | Anti-disassembly fastener |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010202120.5A CN111271350A (en) | 2020-03-20 | 2020-03-20 | Anti-disassembly fastener |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111271350A true CN111271350A (en) | 2020-06-12 |
Family
ID=70999861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010202120.5A Pending CN111271350A (en) | 2020-03-20 | 2020-03-20 | Anti-disassembly fastener |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111271350A (en) |
-
2020
- 2020-03-20 CN CN202010202120.5A patent/CN111271350A/en active Pending
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