CN210079941U - Chemical anchor bolt injection cylinder - Google Patents
Chemical anchor bolt injection cylinder Download PDFInfo
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- CN210079941U CN210079941U CN201920019950.7U CN201920019950U CN210079941U CN 210079941 U CN210079941 U CN 210079941U CN 201920019950 U CN201920019950 U CN 201920019950U CN 210079941 U CN210079941 U CN 210079941U
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Abstract
The utility model discloses a chemical anchor bolt injection tube includes: a main material cartridge which is a container having a housing space for housing a main material; a hardening material cartridge for containing a hardening material; a discharge unit connected to the main material cylinder and the hardening material cylinder in such a manner that the fluid flows therethrough, and configured to discharge the main material and the hardening material; and an injection nozzle having a coupling portion for coupling to the discharge portion, and injecting the main material and the mixed material discharged through the discharge portion into a hole of the base material into which the anchor bolt is inserted while mixing the main material and the mixed material; wherein, the joint portion forms the joint arch in the medial surface, includes: a main material discharge port connected to the housing space of the main material cylinder in such a manner that a fluid flows; a hardening material discharge port connected to the housing space of the hardening material cylinder in such a manner that the fluid flows; and a coupling groove that guides the coupling protrusion to move in the circumferential direction of the discharge portion after the coupling protrusion is inserted in the axial direction of the discharge portion.
Description
Technical Field
The utility model relates to a chemistry crab-bolt injection tube especially relates to a combination structure of pouring nozzle and dustcoat is a chemical crab-bolt injection tube of touching formula structure.
Background
In general, chemical anchors are used in applications such as concrete or foam concrete or rock
After a hole is formed in the base material and the anchor bolt is inserted into the hole, the anchor bolt is fixed by filling the remaining space in the hole with a chemical substance and then performing adhesive solidification, and the base material and the hardened material, which are respectively contained in the large container and the small container, are mixed with each other while being discharged through the discharge port on one side, and are chemically reacted during the mixing process, thereby being firmly fixed to the inside of the hole.
The chemical anchor configured as described above is sold and distributed in a state of being accommodated in a dedicated container in a state of integrally forming a hardening material container on the side of a circular main material container, and the contents are discharged from a discharge port formed at the tip end portion.
As a conventional art of the chemical anchor bolt cartridge, there is a chemical anchor bolt discharge portion opening/closing structure of korean registered utility model No. 20-03700847. The above utility model discloses a form the screw thread in the discharge portion and form the nut at the medial surface of extrusion pole to adopt the screw thread bonding mode when combining the extrusion pole to the discharge portion. Therefore, when the pressing rod is coupled to the discharge portion, the pressing rod must be rotated in a screw direction for coupling, and thus the manner of coupling the pressing rod to the discharge portion is inconvenient.
Therefore, the present inventors have made extensive studies to solve the above-mentioned problems, and as a result, have developed a chemical anchor syringe in which a nozzle can be coupled to a discharge portion of the chemical anchor syringe by only slightly rotating the nozzle in one direction after inserting the nozzle into the discharge portion, and the nozzle can be firmly coupled to the discharge portion.
SUMMERY OF THE UTILITY MODEL
The utility model provides a chemical anchor bolt injection tube, a serial communication port, include: a main material cylinder having a container with an accommodation space for accommodating a main material; a hardening material cartridge having a container with a housing space, the housing space containing a hardening material therein; a discharge unit connected to the main material cylinder and the hardening material cylinder so as to allow a fluid to flow therethrough, for discharging the main material and the hardening material; and an injection nozzle having a coupling portion for coupling to the discharge portion, the injection nozzle being coupled to the discharge portion to inject the main material and the mixed material discharged through the discharge portion into a hole of the base material into which the anchor bolt is inserted while mixing the main material and the mixed material; wherein the combination part forms a combination protrusion on the inner side surface, the cross section shape of the discharge part vertical to the discharge direction of the main material and the hardening material is a circle, and the combination part comprises: a main material discharge port connected to the accommodation space of the main material cylinder in such a manner that a fluid can flow; a hardening material discharge port connected to the housing space of the hardening material cylinder so that a fluid can flow; and a coupling groove that is guided so as to be movable in the circumferential direction of the discharge unit after the coupling projection is inserted in the axial direction of the discharge unit.
The above-mentioned combination groove includes: an insertion portion extending in an axial direction of the discharge portion; and a 1 st guide part extending from a distal end position of the insertion part in a 1 st direction along a circumferential surface of the discharge part; wherein the coupling protrusion is coupled to the discharge portion by being rotated in the 1 st direction by the 1 st guide portion after being inserted into the coupling groove along the insertion portion.
The discharge unit includes: a 1 st sliding surface; and a 1 st side wall perpendicular to the 1 st sliding surface; the 1 st guide part includes: a 2 nd sliding surface extended from the 1 st sliding surface; and a 2 nd side wall extending from the 1 st side wall and perpendicular to the 2 nd sliding surface; wherein the thickness of the 1 st sliding surface gradually increases from the tip end portion of the discharge portion toward the 2 nd sliding surface, and the thickness of the 2 nd sliding surface corresponds to the increased thickness of the 1 st sliding surface.
In addition, the coupling groove further includes: a bulge receiving part formed on the 2 nd side wall; in this case, the coupling protrusion moves along the 1 st guide portion to reach an inner position of the protrusion receiving portion.
In another embodiment of the present invention, the above-mentioned combination groove further includes: and a 2 nd guide part extending from a distal end position of the insertion part in a 2 nd direction opposite to the 1 st direction along a circumferential surface of the discharge part.
Be suitable for the utility model discloses a chemical anchor injection tube of another embodiment includes: a main material cylinder having a container with an accommodation space for accommodating a main material; a hardening material cartridge having a container with a housing space, the housing space containing a hardening material therein; a discharge unit connected to the main material cylinder and the hardening material cylinder so as to allow a fluid to flow, for discharging the main material and the hardening material, the discharge unit having a circular cross-sectional shape perpendicular to a discharge direction of the main material and the hardening material, and including a main material discharge port connected to a housing space of the main material cylinder so as to allow a fluid to flow, a hardening material discharge port connected to a housing space of the hardening material cylinder so as to allow a fluid to flow; a discharge port cover which seals the main material discharge port and the hardening material discharge port by being coupled to the main material discharge port and the hardening material discharge port, and a cover which is coupled to the discharge portion and fixes a coupling state of the discharge port cover; the discharge part has a plurality of stopping projections forming an inclined surface, a plurality of stopping ridges combined with the plurality of stopping projections are formed on the inner side surface of the outer cover, and when the outer cover is inserted into the discharge part and rotates along the circumferential direction of the discharge part, the outer cover is combined with the discharge part through the mutual combination of the plurality of stopping projections and the plurality of stopping ridges.
Drawings
Fig. 1 is a perspective view showing a structure of a chemical anchoring cylinder to which an embodiment of the present invention is applied.
Fig. 2 is a partially enlarged oblique view showing an enlarged view of the discharge portion shown in fig. 1.
Fig. 3 is a partially enlarged cross-sectional view showing an enlarged cross-section of the discharge portion shown in fig. 1.
Fig. 4 is a partially enlarged oblique view for explaining a chemical anchoring cylinder to which another embodiment of the present invention is applied.
Fig. 5 is a partially enlarged oblique view illustrating a structure of a chemical anchoring cylinder to which still another embodiment of the present invention is applied.
Detailed Description
Next, a chemical anchor syringe to which an embodiment of the present invention is applied will be described in detail with reference to the accompanying drawings. The present invention can be variously modified and has various forms, and specific embodiments will be illustrated and described in detail in the text. However, the following description is not intended to limit the present invention to the specific forms disclosed, but should be construed to include all modifications, equivalents, and alternatives falling within the spirit and scope of the present invention. In the description of the respective drawings, like reference numerals are used for like constituent elements. In order to more clearly explain the present invention, the dimensions of the structure are shown in an enlarged scale in the drawings.
Terms such as 1 st and 2 nd may be used in describing different components, but the components are not limited to the terms. The above terms are only used to distinguish one constituent element from other constituent elements. For example, the 1 st component may be named the 2 nd component, and similarly, the 2 nd component may be named the 1 st component without departing from the scope of the claims of the present invention.
The terminology used in the description presented herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. In the present invention, the terms "including" or "comprising" or "… …" are used merely to indicate that a feature, a number, a step, an action, a component, a member, or a combination thereof described in the specification is present, and should not be understood as excluding the possibility that one or more other features, numbers, steps, actions, components, members, or a combination thereof are present or added.
Unless otherwise defined, all terms used in the present specification including technical or scientific terms have the same meaning as commonly understood by one having ordinary knowledge in the art to which the present invention belongs. Terms commonly used as they are defined in dictionaries should be interpreted as having the same meaning as they have in the context of the relevant art and should not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Fig. 1 is a perspective view showing a structure of a chemical anchor cartridge to which an embodiment of the present invention is applied, fig. 2 is a partially enlarged perspective view showing an enlarged view of a discharge portion shown in fig. 1, and fig. 3 is a partially enlarged cross-sectional view showing a cross-section of the discharge portion shown in fig. 1.
As shown in fig. 1 to 3, a chemical anchor injection cartridge according to an embodiment of the present invention includes: a main material cartridge 110; a hardened material cartridge 120; a discharge section 130; and, an injection nozzle 140.
The main material cylinder 110 is a portion for storing a main material of chemical raw materials for fixing the anchor bolt. The main material cartridge 110 has a housing space for housing the main material. The main material cylinder 110 is a container having the above-described housing space, and may be in a hollow cylindrical form. In order to inject the main material into the accommodating space, the cylinder may be in a form of being opened at a rear side thereof or may be provided with an injection port for injecting the main material. As an example, the cylinder can be made of a flexible material or a hard plastic material. The shape and material of the main material cylinder 110 are merely exemplary, and the present invention is not limited thereto.
The hardening material cartridge 120 is a portion for storing a hardening material in a chemical material for fixing the anchor bolt. The curing material cartridge 120 has a housing space for housing the curing material. The hardening material cylinder 120 is a container having the receiving space, and can be formed of the same or similar material and shape as the main material cylinder 110, and thus a detailed description thereof will be omitted.
The discharge unit 130 is a part for discharging the main material and the hardening material contained in the main material cartridge 110 and the hardening material cartridge 120 to the outside. For this purpose, the discharge unit 130 is formed in front of the main material cylinder 110 and the hardening material cylinder 120, and is connected to the main material cylinder 110 and the hardening material cylinder 120 so as to allow a fluid to flow. As an example, the discharge part 130 can be integrally formed with the hardening material cylinder 120 and the main material cylinder 110. In the discharge portion 130, a cross-sectional shape perpendicular to a discharge direction of the main material and the hardened material is a circular shape. For example, the discharge portion 130 may have a conical shape with a cut-off head, but is not limited thereto and may have a cylindrical shape.
The discharge unit 130 includes: a main material discharge port 130 for discharging the main material from the main material cartridge 110; and a hardened material discharge port 132 for discharging the hardened material from the hardened material cartridge 120. The main material discharge port 131 is connected to the housing space of the main material cartridge 110 so as to allow a fluid to flow, and the hardening material discharge port 132 is connected to the housing space of the hardening material cartridge 120 so as to allow a fluid to flow.
Further, the discharge portion 130 includes: a coupling groove 133 for coupling with the injection nozzle 140. The coupling groove 133 is coupled with a coupling protrusion 141a, which will be described later, in the injection nozzle 140. And a coupling groove 133 for guiding the coupling protrusion 141a to be movable in a circumferential direction of the discharge unit 130 after being inserted in an axial direction of the discharge unit 130. For this, the coupling groove 133 includes an insertion part 1331 and a 1 st guide part 1332.
The insertion portion 1331 extends from the distal end portion of the discharge portion 130 in the axial direction of the discharge portion 130. The insertion portion 1331 includes: 1 st sliding surface 1331 a; and a 1 st side wall 1331b perpendicular to the 1 st sliding surface 1331 a. Here, the thickness of the 1 st sliding surface 1331a gradually increases from the leading end portion of the discharge portion 130 to the 1 st guide portion 1332.
The 1 st guide part 1332 extends from the end position of the insertion part 1331 in the 1 st direction along the circumferential surface of the discharge part 130. The 1 st direction may be, for example, a counterclockwise direction. The 1 st guide part 1332 includes: a 2 nd sliding surface 1332 a; and a 2 nd side wall 1332b extending from the 1 st side wall 1331b and perpendicular to the 2 nd sliding surface 1332 a. The thickness of the 2 nd sliding surface 1332a corresponds to the increased thickness of the 1 st sliding surface 1331a, and the 2 nd side wall 1332b is a portion for blocking the coupling protrusion 141 a.
The insertion portion 1331 and the 1 st guide portion 1332 can form the coupling groove 133 when viewed from the plane
A word shape. The coupling groove 133 may be formed in plurality along the circumferential direction of the outer surface of the discharge portion 130.
The injection nozzle 140 is coupled to the discharge portion 130 to inject the main material and the hardening material discharged through the discharge portion 130 into the hole into which the anchor bolt base material is inserted while mixing the main material and the hardening material. The injection nozzle 140 includes a coupling portion 141 for coupling to the discharge portion 130. The shape of the coupling portion 141 corresponds to the shape of the discharge portion 130, and the inner surface of the coupling portion 141 has a coupling protrusion 141a coupled to the coupling groove 133. The number of the coupling protrusions 141a is the same as the number of the coupling grooves 133.
As described above, the chemical anchoring cylinder according to the present invention can mount the nozzle 140 to the discharge port in a one-touch manner. Next, a one-touch bonding process will be explained.
In coupling the injection nozzle 140 to the discharge port, the coupling portion 141 of the injection nozzle 140 is first aligned with the discharge portion 130. At this time, the coupling protrusion 141a of the coupling portion 141 is positioned to correspond to the coupling groove 133 formed in the discharge portion 130.
After the injection nozzle 140 is fitted into the discharge part 130 in the above state, the injection nozzle 140 is rotated counterclockwise. At this time, the coupling protrusion 141a is inserted into the insertion portion 1331 of the coupling groove 133 and then moved along the axial direction of the discharge portion 130, and the coupling protrusion 141a is moved along the 1 st guide portion 1332 of the coupling groove 133 toward the inside of the 1 st guide portion 1332 while the injection nozzle 140 is rotated in the counterclockwise direction.
In the above-described process, since the thickness of the 1 st sliding surface 1331a of the insertion portion 1331 gradually increases toward the 2 nd sliding surface 1332a, the 1 st sliding surface 1331a is pressurized when the coupling protrusion 141a moves along the 1 st sliding surface 1331a and reaches a region where the thickness of the 1 st sliding surface 1331a increases. In the above-described state, since the thickness of the 2 nd sliding surface 1332a corresponds to the increased thickness of the 1 st sliding surface 1331a, the coupling protrusion 141a moves to the inside of the 1 st guide part 1332 in a state of pressurizing the 1 st sliding surface 1331a and the 2 nd sliding surface 1332 a. At this time, the combining protrusion 141a moved to the inside of the 1 st guide part 1332 will be blocked by the 2 nd side wall 1332 b. Through the process as described above, the coupling protrusion 141a is strongly coupled to the inside of the coupling groove 133.
Therefore, the chemical anchor bolt injection cylinder according to an embodiment of the present invention can simply complete the coupling process of the injection nozzle 140 in a one-touch manner, and couple the injection nozzle 140 to the discharge part 130 in a firm state.
Further, a projection receiving portion 1332c may be formed on the 2 nd side wall 1332b of the 1 st guide portion 1332 of the coupling groove 133. In this case, when the coupling protrusion 141a of the injection nozzle 140 is coupled to the coupling groove 133, it is blocked to the inside of the protrusion receiving part 1332c when it is inserted into the insertion part 1331 and completely inserted into the inside of the 1 st guide part 1332 along the 1 st guide part 1332. This makes it possible to further strengthen the coupling state of the nozzle 140.
Next, with reference to fig. 4, the difference between the chemical anchoring syringe to which the present invention is applied and the chemical anchoring syringe to which the present invention is applied according to the embodiment of the present invention is described in detail. Fig. 4 is a partially enlarged oblique view for explaining a chemical anchoring cylinder to which another embodiment of the present invention is applied.
As shown in fig. 4, the chemical anchoring cylinder to which the present invention is applied according to another embodiment of the present invention is the same as the chemical anchoring cylinder to which the present invention is applied, except that the combination groove 133 further includes the 2 nd guide portion 133.
The 2 nd guide part 1333 extends from the distal end position of the insertion part 1331 in the 2 nd direction opposite to the 1 st direction in which the 1 st guide part 1332 extends along the circumferential surface of the discharge part 130. The 2 nd direction can be a clockwise direction. By forming the 2 nd guide part 1333 in the coupling groove 133, the coupling groove 133 can be formed in a T shape when viewed from a plane.
Thereby, when the injection nozzle is coupled to the discharge part 130, the injection nozzle can be rotated in a counterclockwise direction or a clockwise direction after the coupling protrusion of the injection nozzle is inserted into the insertion part 1331, thereby realizing one-touch coupling.
Fig. 5 is a partially enlarged oblique view illustrating a structure of a chemical anchoring cylinder to which still another embodiment of the present invention is applied.
As shown in fig. 5, a chemical anchoring syringe according to another embodiment of the present invention includes: a main material cartridge 210; a hardened material cartridge 230; a discharge section 240; a discharge portion cover 240; and, a housing 250.
Since the main material cartridge 210 and the hardening material cartridge 220 are the same as the main material cartridge 110 and the hardening material cartridge 120 to which an embodiment of the present invention is applied, the detailed description thereof will be replaced with the description of the main material cartridge 110 and the hardening material cartridge 120 to which an embodiment of the present invention is applied.
The discharge portion 230 includes a main material discharge port 231 and a hardening material discharge port 232. Further, a plurality of stopper projections 233 having inclined surfaces 233a are formed on the outer side surface of the discharge portion 230. Since the above-described discharge part 230 is similar to the discharge part 130 to which the chemical anchor syringe according to an embodiment of the present invention is applied except that the coupling groove 133 to which the discharge part 130 to which the chemical anchor syringe according to an embodiment of the present invention is applied is replaced by the formation of the blocking protrusion 233, the detailed description related thereto will be replaced with the description of the discharge part 130 to which the chemical anchor syringe according to an embodiment of the present invention is applied.
The discharge portion cover 240 is coupled to the discharge portion 230 to seal the main material discharge port 231 and the hardening material discharge port 232. To this end, the discharge part cover 240 includes: a main material discharge port sealing portion 241 coupled to the main material discharge port 231; and a hardened material discharge port sealing part 242 to which the hardened material discharge port 232 is bonded. The discharge port cover 240 is coupled to the discharge part 230 at ordinary times to prevent the discharge of the main material and the hardening material, and is separated from the discharge part 230 when the use of the main material and the hardening material is required.
The cover 250 is coupled to the discharge part 230, and fixes a state in which the discharge port cover 240 is coupled to the discharge part 230. The cover 250 is coupled to the discharge part 230 at ordinary times and is separated from the discharge part 230 when the use of the main material and the hardening material is required. In order to couple the outer cover 250 to the discharge part 230, a plurality of stopper ridges 251 coupled to the plurality of stopper protrusions 233 are formed at an inner side surface. Accordingly, when the outer cover 250 is inserted into the discharge part 230 and rotated in the circumferential direction of the discharge part 230, the plurality of stopper projections 233 and the plurality of stopper ridges 251 are coupled to each other, thereby coupling the outer cover 250 to the discharge part 230.
As described above, the chemical anchoring syringe adapted to another embodiment of the present invention also achieves one-touch coupling and decoupling of the housing 250 by means of coupling and decoupling of the plurality of stopper projections 233 and the plurality of stopper ridges 251 to each other when the housing 250 is rotated in the clockwise direction and the counterclockwise direction.
The embodiments disclosed are merely illustrative of one having ordinary skill in the art to which the invention pertains and for the purposes of facilitating the practice of the invention. Various modifications to the embodiments will be readily apparent to those having ordinary skill in the art, and the generic principles defined herein may be applied to other embodiments without departing from the scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (4)
1. A chemical anchoring syringe, comprising:
a main material cylinder having a container with an accommodation space for accommodating a main material;
a hardening material cartridge having a container with a housing space, the housing space containing a hardening material therein;
a discharge unit connected to the main material cylinder and the hardening material cylinder so as to allow a fluid to flow therethrough, for discharging the main material and the hardening material; and the number of the first and second groups,
an injection nozzle having a coupling portion for coupling to the discharge portion, the injection nozzle being coupled to the discharge portion to inject the main material and the mixed material discharged through the discharge portion into a hole of the base material into which the anchor bolt is inserted while mixing the main material and the mixed material;
wherein the combination part forms a combination bulge on the inner side surface,
the discharge portion has a circular cross-sectional shape perpendicular to a discharge direction of the main material and the hardened material, and includes: a main material discharge port connected to the accommodation space of the main material cylinder in such a manner that a fluid can flow; a hardening material discharge port connected to the housing space of the hardening material cylinder so that a fluid can flow; and, a coupling groove;
wherein, above-mentioned combination groove includes:
an insertion portion extending in an axial direction of the discharge portion; and the number of the first and second groups,
a 1 st guide part extending from a distal end position of the insertion part in a 1 st direction along a circumferential surface of the discharge part;
wherein the coupling protrusion is coupled to the discharge portion by being rotated in the 1 st direction by the 1 st guide portion after being inserted into the coupling groove along the insertion portion.
2. The chemical anchor syringe of claim 1, wherein:
the insertion portion includes: a 1 st sliding surface; and a 1 st side wall perpendicular to the 1 st sliding surface;
the 1 st guide part includes: a 2 nd sliding surface extended from the 1 st sliding surface; and a 2 nd side wall extending from the 1 st side wall and perpendicular to the 2 nd sliding surface;
the thickness of the 1 st sliding surface gradually increases from the tip of the discharge portion toward the 2 nd sliding surface,
the thickness of the 2 nd sliding surface corresponds to the increased thickness of the 1 st sliding surface,
the above-mentioned combination groove still includes: a bulge receiving part formed on the 2 nd side wall;
the combination projection moves along the 1 st guide part and reaches the inner position of the projection accommodating part.
3. The chemical anchor syringe of claim 1, wherein:
the above-mentioned combination groove still includes: and a 2 nd guide part extending from a distal end position of the insertion part in a 2 nd direction opposite to the 1 st direction along a circumferential surface of the discharge part.
4. A chemical anchoring syringe, comprising:
a main material cylinder having a container with an accommodation space for accommodating a main material;
a hardening material cartridge having a container with a housing space, the housing space containing a hardening material therein;
a discharge unit connected to the main material cylinder and the hardening material cylinder so as to allow a fluid to flow therethrough, for discharging the main material and the hardening material, the discharge unit having a circular cross-sectional shape perpendicular to a discharge direction of the main material and the hardening material, the discharge unit including: a main material discharge port connected to the accommodation space of the main material cylinder in such a manner that a fluid can flow; a hardening material discharge port connected to the housing space of the hardening material cylinder so that a fluid can flow;
a discharge port cover which seals the main material discharge port and the hardening material discharge port by being coupled to the main material discharge port and the hardening material discharge port; and the number of the first and second groups,
a cover coupled to the discharge part for fixing a coupling state of the discharge port cover;
wherein the discharge part has a plurality of stopping protrusions forming an inclined surface,
a plurality of blocking ridges combined with the plurality of blocking bulges are formed on the inner side surface of the outer cover,
when the cover is inserted into the discharge part and rotated in the circumferential direction of the discharge part, the cover is coupled to the discharge part by the coupling between the plurality of catching projections and the plurality of catching ridges.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920019950.7U CN210079941U (en) | 2019-01-07 | 2019-01-07 | Chemical anchor bolt injection cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920019950.7U CN210079941U (en) | 2019-01-07 | 2019-01-07 | Chemical anchor bolt injection cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210079941U true CN210079941U (en) | 2020-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920019950.7U Active CN210079941U (en) | 2019-01-07 | 2019-01-07 | Chemical anchor bolt injection cylinder |
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| Country | Link |
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| CN (1) | CN210079941U (en) |
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2019
- 2019-01-07 CN CN201920019950.7U patent/CN210079941U/en active Active
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