CN215899700U - Stethoscope heater and stethoscope component using same - Google Patents
Stethoscope heater and stethoscope component using same Download PDFInfo
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- CN215899700U CN215899700U CN202120151414.XU CN202120151414U CN215899700U CN 215899700 U CN215899700 U CN 215899700U CN 202120151414 U CN202120151414 U CN 202120151414U CN 215899700 U CN215899700 U CN 215899700U
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- Prior art keywords
- friction surface
- stethoscope
- rotating
- rotating member
- auscultation head
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- 238000002555 auscultation Methods 0.000 claims abstract description 37
- 238000003825 pressing Methods 0.000 claims description 37
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 description 11
- 230000020169 heat generation Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005485 electric heating Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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Abstract
The utility model relates to the technical field of medical instruments, in particular to a stethoscope heater and a stethoscope component using the same. The stethoscope heater comprises a shell, a rotating part and a fixing part; the rotating part is provided with a first friction surface, the fixing part is provided with a second friction surface, and the first friction surface is jointed with the second friction surface; in the rotation stroke of the rotating member, the first friction surface and the second friction surface are rubbed relatively, so that the friction force generates heat on the first friction surface and the second friction surface, and the heat generated on the second friction surface can be transferred to the whole fixing member to further raise the temperature of the fixing member; the casing still places the storehouse including the auscultation head, and the auscultation head is placed the storehouse and is had the space that holds the auscultation head, and the auscultation head gets into to place the storehouse in back and the mounting contact make heat transfer to auscultation head. The stethoscope heater utilizes mechanical motion to generate heat through friction, and the stethoscope head can be heated without other electronic elements and power supplies, so that the stethoscope heater is simple in structure, low in production cost and high in safety.
Description
Technical Field
The utility model relates to the technical field of medical instruments, in particular to a stethoscope heater and a stethoscope component using the same.
Background
The stethoscope is a medical appliance widely used by doctors for disease diagnosis, and when in use, the stethoscope head of the stethoscope is attached to a certain part of the body of a patient to judge the illness state in the human body. The material of auscultation head generally is the metal material, when carrying out the auscultation to the patient winter, the auscultation head mostly can with skin direct contact, the stethoscope in case contact human skin, can let the people feel very cold, very easy amazing human body, the heartbeat probably will be unbalance or not natural like this, is not natural heartbeat, and then leads to the heart rate distortion, the deviation appears in listening diagnostic result.
In order to solve the problem that the stethoscope easily stimulates the human body due to low temperature when being used in winter, a stethoscope capable of self-heating is available in the market, for example, a medical stethoscope with heating function disclosed in patent document with publication number CN212015624U and publication date 2020.11.27 is improved in that a heater for heating the stethoscope head is provided in the stethoscope head of the stethoscope, and the heater is distributed on the bottom surface of the shell of the stethoscope head. The heater is powered by a battery installed in the stethoscope head, and when the stethoscope head needs to be heated, the switch is turned on, the battery is electrically connected with the heater, so that the heater works to directly heat the shell of the stethoscope head.
This type of stethoscope, in which a heater is provided in a head, can heat the head, but has the following problems:
1. the heater and the power supply are arranged in the small stethoscope head, so that the stethoscope head is complex in structure and not beneficial to later maintenance and battery replacement;
2. because the auscultation head can be in direct contact with the skin of the body of a patient, the problem of electric leakage can occur when a power supply is directly arranged in the auscultation head, and the safety is poor.
Disclosure of Invention
Therefore, the technical problem to be solved by the present invention is to overcome the defects of poor safety and complex structure of the stethoscope in the prior art, so as to provide a stethoscope heater and a stethoscope component using the same.
The technical scheme of the utility model has the following advantages:
the stethoscope heater provided by the utility model comprises:
a housing including a cylindrical support shaft;
the rotating piece is rotatably assembled on the supporting shaft and can rotate relative to the supporting shaft;
the fixing piece is fixedly arranged on the shell;
the rotating part is provided with a first friction surface facing the fixed part, the fixed part is provided with a second friction surface facing the rotating part, and the first friction surface is attached to the second friction surface; in the rotation stroke of the rotating member, the first friction surface and the second friction surface are rubbed relatively, so that the friction force generates heat on the first friction surface and the second friction surface, and the heat generated on the second friction surface can be transferred to the whole fixing member to further raise the temperature of the fixing member;
the casing still includes the auscultation head and places the storehouse, the auscultation head is placed the storehouse and is set up in one side of mounting dorsad second friction surface, and the auscultation head is placed the storehouse and is had the space that holds the auscultation head to make the auscultation head get into and place the storehouse in the back can make heat transfer to the auscultation head with the mounting contact.
The beneficial effects are that: the rotating part and the fixing part in the stethoscope heater can generate heat through the relative friction of the first friction surface and the second friction surface during relative motion, and then the temperature of the stethoscope head is raised through the heat transmitted by the fixing part. In the whole process, a user only needs to rotate the rotating part, heat is generated by friction through mechanical motion of the rotating part and the fixing part, other electronic elements and power supplies are not needed, and the electric heating device is simple in structure, low in production cost and high in safety.
Furthermore, the outer surface of the rotating part is provided with a bulge for being held by a hand of a person, so that the whole rotating part is driven to rotate relative to the fixing part by pushing the bulge.
The beneficial effects are that: the rotary piece is provided with the bulge, so that a user can drive the rotary piece to move conveniently, and convenience is improved.
Furthermore, a cylindrical protrusion is arranged on the side surface of the rotating part, which is back to the first friction surface, the extending direction of the cylindrical protrusion is the same as the axial direction of the supporting shaft, and the cylindrical protrusion forms a protrusion on the rotating part.
The beneficial effects are that: the side surface of the rotating part, which is back to the first friction surface, is provided with the bulge for manual operation, the structure is simple, the realization is convenient, and the relative motion of the transmission part and the fixing part cannot be structurally interfered.
Furthermore, the distance between the rotating part and the fixed part is adjustable.
The beneficial effects are that: the fixing part and the rotating part work by means of a friction heat generation principle, and the rotating part and the fixing part are abraded due to friction, so that the distance between the rotating part and the fixing part can be adjusted to ensure that the fixing part and the rotating part are always pressed and attached together, the friction effect of the fixing part and the rotating part is ensured, and the heat generation is ensured.
Furthermore, the end part of the supporting shaft is in threaded connection with a pressing cap, the pressing cap can adjust the relative position of the pressing cap and the supporting shaft through self rotation, a thrust bearing is arranged between the pressing cap and the rotating part, and the pressing cap can provide pressing force for the rotating part through the thrust bearing so as to adjust the relative position between the rotating part and the fixing part.
The beneficial effects are that: the device is realized by a pressing cap and a thrust bearing, the positions of the fixing piece and the rotating piece are adjustable, the structure is simple, and the device is convenient to realize.
The utility model provides a stethoscope component, which comprises a stethoscope and a stethoscope heater, wherein the stethoscope heater comprises:
a housing including a cylindrical support shaft;
the rotating piece is rotatably assembled on the supporting shaft and can rotate relative to the supporting shaft;
the fixing piece is fixedly arranged on the shell;
the rotating part is provided with a first friction surface facing the fixed part, the fixed part is provided with a second friction surface facing the rotating part, and the first friction surface is attached to the second friction surface; in the rotation stroke of the rotating member, the first friction surface and the second friction surface are rubbed relatively, so that the friction force generates heat on the first friction surface and the second friction surface, and the heat generated on the second friction surface can be transferred to the whole fixing member to further raise the temperature of the fixing member;
the casing still includes the auscultation head and places the storehouse, the auscultation head is placed the storehouse and is set up in one side of mounting dorsad second friction surface, and the auscultation head is placed the storehouse and is had the space that holds the auscultation head to make the auscultation head get into and place the storehouse in the back can make heat transfer to the auscultation head with the mounting contact.
The beneficial effects are that: the rotating part and the fixing part in the stethoscope heater can generate heat through the relative friction of the first friction surface and the second friction surface during relative motion, and then the temperature of the stethoscope head is raised through the heat transmitted by the fixing part. In the whole process, a user only needs to rotate the rotating part, heat is generated by friction through mechanical motion of the rotating part and the fixing part, other electronic elements and power supplies are not needed, and the electric heating device is simple in structure, low in production cost and high in safety.
Furthermore, the outer surface of the rotating part is provided with a bulge for being held by a hand of a person, so that the whole rotating part is driven to rotate relative to the fixing part by pushing the bulge.
The beneficial effects are that: the rotary piece is provided with the bulge, so that a user can drive the rotary piece to move conveniently, and convenience is improved.
Furthermore, a cylindrical protrusion is arranged on the side surface of the rotating part, which is back to the first friction surface, the extending direction of the cylindrical protrusion is the same as the axial direction of the supporting shaft, and the cylindrical protrusion forms a protrusion on the rotating part.
The beneficial effects are that: the side surface of the rotating part, which is back to the first friction surface, is provided with the bulge for manual operation, the structure is simple, the realization is convenient, and the relative motion of the transmission part and the fixing part cannot be structurally interfered.
Furthermore, the distance between the rotating part and the fixed part is adjustable.
The beneficial effects are that: the fixing part and the rotating part work by means of a friction heat generation principle, and the rotating part and the fixing part are abraded due to friction, so that the distance between the rotating part and the fixing part can be adjusted to ensure that the fixing part and the rotating part are always pressed and attached together, the friction effect of the fixing part and the rotating part is ensured, and the heat generation is ensured.
Furthermore, the end part of the supporting shaft is in threaded connection with a pressing cap, the pressing cap can adjust the relative position of the pressing cap and the supporting shaft through self rotation, a thrust bearing is arranged between the pressing cap and the rotating part, and the pressing cap can provide pressing force for the rotating part through the thrust bearing so as to adjust the relative position between the rotating part and the fixing part.
The beneficial effects are that: the device is realized by a pressing cap and a thrust bearing, the positions of the fixing piece and the rotating piece are adjustable, the structure is simple, and the device is convenient to realize.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a front view of a stethoscope heater provided in a first embodiment of the present invention;
FIG. 2 is a cross-sectional view of the stethoscope heater shown in FIG. 1;
FIG. 3 is a cross-sectional view of the housing shown in FIG. 1;
FIG. 4 is a top view of the housing of FIG. 3;
FIG. 5 is a schematic structural view of a rotating member and a fixed member of a first embodiment of a stethoscope assembly according to the present invention;
description of reference numerals:
10-a housing; 11-a stethoscope head placing bin; 12-a support shaft;
13-a rotating member; 131-a first friction face; 132-columnar protrusions;
14-a fixing member; 141-a second friction face; 142-linear heat transfer protrusions;
15-pressing the cap; 16-a thrust bearing; 161-thrust washer; 162-rolling elements;
17-bowl configuration; 171-straight hollow.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Embodiment 1 of the stethoscope component of the present invention: the stethoscope component comprises a stethoscope and a stethoscope heater matched with the stethoscope, the stethoscope is of a common structure, and the main improvement of the utility model is to provide the stethoscope heater capable of heating a stethoscope head in the stethoscope. As shown in fig. 1, the stethoscope heater basically includes a housing 10, and a rotating member 13 and a fixing member 14 mounted on the housing 10. Wherein the rotating member 13 and the fixed member 14 are made of an alloy material having good thermal conductivity. The rotating part 13 can rotate relative to the fixing part 14, the two parts generate heat through friction, and the fixing part 14 can transmit the heat to the stethoscope head at the same time, so that the stethoscope head can be heated.
Specifically, the housing 10 of the stethoscope heater is made of plastic, so that it is easy to form, light in weight, and low in production cost. Taking the up-and-down direction in fig. 2 and 3 as an example, the housing 10 includes an upper support shaft 12, the support shaft 12 is a solid structure, and a bowl-shaped structure 17 connected to the support shaft 12, the bowl-shaped structure 17 has a concave cavity, and the end of the support shaft 12 is connected to the bottom of the cavity.
In the bottom position of bowl-shaped structure 17, still be provided with an auscultation head and place storehouse 11, the auscultation head is placed and is had the space that is used for holding the auscultation head in the storehouse 11. An opening is arranged on the wall of the stethoscope head placing chamber 11, so that the stethoscope head can stretch into the opening.
The rotating member 13 and the fixed member 14, which are embodied as disks, of the present invention are made of iron alloy. Wherein, the rotating part 13 is provided with an opening matched with the supporting shaft 12, so that the rotating part 13 is rotatably assembled on the supporting shaft 12 and can rotate around the axis of the supporting shaft 12. The fixed member 14 is fixedly mounted on the bowl-shaped structure 17 of the housing 10, and correspondingly, the fixed member 14 is also provided with an escape opening for escaping the support shaft 12.
As shown in fig. 4 and 5, the radial dimension of the rotating member 13 is slightly larger than that of the fixing member 14, the rotating member 13 has a first friction surface 131 facing the fixing member 14, the fixing member 14 has a second friction surface 141 facing the rotating member 13, when the stethoscope heater is assembled, the fixing member 14 is first fitted on the supporting shaft 12, the fixing member 14 is then dropped into the bowl-shaped structure 17, and the rotating member 13 is fitted, and the first friction surface 131 of the rotating member 13 is engaged with the second friction surface 141 of the fixing member 14.
Friction protrusions are provided on the first friction surface 131 of the rotating member 13 and the second friction surface 141 of the fixed member 14 in order to increase the friction coefficient of the first friction surface 131 and the second friction surface 141, and further to improve thermal efficiency and increase heat in a process of generating heat by friction between the first friction surface 131 and the second friction surface 141.
On the side of the fixing member 14 facing away from the second friction face 141, i.e., on the side close to the head placing compartment 11 when the fixing member 14 is placed in the housing 10, there are provided heat transfer protrusions protruding toward the head placing compartment 11, the heat transfer protrusions being in the form of a straight line symmetrically arranged on the corresponding side of the fixing member 14. Correspondingly, the bowl bottom of the bowl-shaped structure 17 is provided with the linear hollow 171 corresponding to the linear heat transfer protrusion 142, when the fixing member 14 is placed in the bowl-shaped structure 17, the linear heat transfer protrusion 142 of the fixing member 14 enters the linear hollow 171 of the housing 10, so that the fixing member 14 can enter the stethoscope head placing chamber 11, and the linear hollow 171 and the linear heat transfer protrusion 142 can be used for blocking and matching to limit the rotation of the fixing member 14 driven by friction force in the rotation process of the rotating member 13.
When the linear heat transfer protrusions 142 of the fixing member 14 enter the stethoscope head placement chamber 11, the stethoscope head can contact the linear heat transfer protrusions 142, and heat on the fixing member 14 can be transferred to the stethoscope head through the linear heat transfer protrusions 142.
In this embodiment, the distance between the fixed member 14 and the rotating member 13 is adjustable, specifically, a threaded section is formed on the outer surface of the end of the supporting shaft 12 away from the fixed member 14, a pressing cap 15 is connected to the threaded section through a thread, and a thrust bearing 16 is disposed between the pressing cap 15 and the rotating member 13. The pressing cap 15 is capable of adjusting its position relative to the support shaft 12 by a screw motion, and the pressing cap 15 is pressed against the upper thrust washer 161 of the thrust bearing 16, and the lower thrust washer 161 of the thrust bearing 16 is in contact with the upward side of the rotating member 13. Rolling bodies 162 are provided between the thrust washers 161.
When the fixed member 14 and the rotating member 13 need to be moved closer due to frictional wear, the pressing cap 15 is rotated, the pressing cap 15 moves toward the fixed member 14, the pressing cap 15 provides pressing force to the thrust washer 161, and the thrust washer 161 transmits the pressing force to the rotating member 13, so that the rotating member 13 moves toward the fixed member 14. Because the thrust bearing 16 is provided between the rotating member 13 and the pressing cap 15, the rotating member 13 can be freely rotated without affecting the position of the rotating member 13.
In order to facilitate the rotation of the rotating member 13, a cylindrical protrusion 132 is provided on a side surface of the rotating member 13 facing away from the first friction surface 131, and the extending direction of the cylindrical protrusion 132 is parallel to the axis of the supporting shaft 12. The surgeon can rotate the rotating member 13 by holding the cylindrical protrusion 132.
In using the stethoscope kit of the present invention, when the head of the stethoscope is placed in the head compartment 11 of the stethoscope heater, the rotating member 13 is rotated relative to the fixing member 14 by pushing the rotating member 13, and the first frictional surface 131 of the rotating member 13 is brought into contact with the second frictional surface 141 of the fixing member 14, thereby generating heat by friction to raise the temperature of the fixing member 14 as a whole. The fixing member 14 further transfers heat to the head mounted in the head mounting chamber 11, thereby raising the temperature of the head.
Embodiment 2 of the stethoscope component of the present invention: the difference from the above embodiment is that in the present embodiment, the rotor is disk-shaped, and a projection for a person to hold is provided on the outer peripheral surface of the rotor so as to extend in the radial direction of the rotor. In other embodiments, the rotating member may be a square plate which is easier to handle than a circular plate, and the rotating member is driven to rotate relative to the fixing member by shifting the corners of the square plate.
Embodiment 3 of the stethoscope component of the present invention: the difference with the above embodiment is that in this embodiment, a spacer is disposed between the pressing cap and the rotating member, and one surface of the spacer facing the rotating member is a smooth sliding surface, which may affect the rotation of the rotating member, but the friction between the spacer and the rotating member is small, and may not greatly affect the rotation of the rotating member. In other embodiments, the distance between the rotating part and the fixed part is not adjustable, and the position of the pressing cap screwed on the supporting shaft is determined, so that the rotating part can be limited to be separated from the supporting shaft.
The structure of the stethoscope heater in the present invention is the same as that of the stethoscope heater in the stethoscope assembly, and the use and effects thereof are the same, and thus, a description of the embodiment of the stethoscope heater will not be repeated.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the utility model.
Claims (10)
1. A stethoscope heater, comprising:
a housing including a cylindrical support shaft;
the rotating piece is rotatably assembled on the supporting shaft and can rotate relative to the supporting shaft;
the fixing piece is fixedly arranged on the shell;
the rotating part is provided with a first friction surface facing the fixed part, the fixed part is provided with a second friction surface facing the rotating part, and the first friction surface is attached to the second friction surface; in the rotation stroke of the rotating member, the first friction surface and the second friction surface are rubbed relatively, so that the friction force generates heat on the first friction surface and the second friction surface, and the heat generated on the second friction surface can be transferred to the whole fixing member to further raise the temperature of the fixing member;
the casing still includes the auscultation head and places the storehouse, the auscultation head is placed the storehouse and is set up in one side of mounting dorsad second friction surface, and the auscultation head is placed the storehouse and is had the space that holds the auscultation head to make the auscultation head get into and place the storehouse in the back can make heat transfer to the auscultation head with the mounting contact.
2. The stethoscope heater according to claim 1 wherein the rotating member has a protrusion formed on an outer surface thereof for being held by a human hand, so that the entire rotating member is rotated relative to the fixing member by pushing the protrusion.
3. The stethoscope heater according to claim 2 wherein the rotating member has a cylindrical projection formed on a side thereof facing away from the first friction surface, the cylindrical projection extending in the same direction as the axial direction of the support shaft, the cylindrical projection forming the projection on the rotating member.
4. The stethoscope heater according to any one of claims 1 to 3 wherein the distance between the rotatable member and the fixed member is adjustable.
5. The stethoscope heater according to claim 4 wherein the end of the supporting shaft is threadedly coupled with a pressing cap, the pressing cap being capable of adjusting the relative position with respect to the supporting shaft by rotating itself, a thrust bearing being provided between the pressing cap and the rotating member, the pressing cap being capable of providing a pressing force to the rotating member through the thrust bearing to adjust the relative position between the rotating member and the fixed member.
6. The stethoscope component is characterized by comprising a stethoscope and a stethoscope heater for heating a stethoscope head in the stethoscope; the stethoscope heater includes:
a housing including a cylindrical support shaft;
the rotating piece is rotatably assembled on the supporting shaft and can rotate relative to the supporting shaft;
the fixing piece is fixedly arranged on the shell;
the rotating part is provided with a first friction surface facing the fixed part, the fixed part is provided with a second friction surface facing the rotating part, and the first friction surface is attached to the second friction surface; in the rotation stroke of the rotating member, the first friction surface and the second friction surface are rubbed relatively, so that the friction force generates heat on the first friction surface and the second friction surface, and the heat generated on the second friction surface can be transferred to the whole fixing member to further raise the temperature of the fixing member;
the casing still includes the auscultation head and places the storehouse, the auscultation head is placed the storehouse and is set up in one side of mounting dorsad second friction surface, and the auscultation head is placed the storehouse and is had the space that holds the auscultation head to make the auscultation head get into and place the storehouse in the back can make heat transfer to the auscultation head with the mounting contact.
7. The stethoscope assembly of claim 6, wherein the rotating member has a protrusion formed on an outer surface thereof for being held by a human hand, so that the rotating member is rotated relative to the fixing member by pushing the protrusion.
8. The stethoscope assembly of claim 7 wherein the rotating member has a cylindrical projection formed on a side thereof facing away from the first friction surface, the cylindrical projection extending in the same direction as the axial direction of the support shaft, the cylindrical projection forming a projection on the rotating member.
9. The stethoscope assembly of any one of claims 6-8, wherein the distance between the rotating member and the fixed member is adjustable.
10. The stethoscope assembly as defined in claim 9, wherein the end of the support shaft is threadedly coupled with a pressing cap, the pressing cap being capable of adjusting the relative position with respect to the support shaft by rotating itself, and a thrust bearing being provided between the pressing cap and the rotating member, the pressing cap being capable of providing a pressing force to the rotating member through the thrust bearing to adjust the relative position between the rotating member and the fixed member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120151414.XU CN215899700U (en) | 2021-01-20 | 2021-01-20 | Stethoscope heater and stethoscope component using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120151414.XU CN215899700U (en) | 2021-01-20 | 2021-01-20 | Stethoscope heater and stethoscope component using same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215899700U true CN215899700U (en) | 2022-02-25 |
Family
ID=80285419
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120151414.XU Expired - Fee Related CN215899700U (en) | 2021-01-20 | 2021-01-20 | Stethoscope heater and stethoscope component using same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215899700U (en) |
-
2021
- 2021-01-20 CN CN202120151414.XU patent/CN215899700U/en not_active Expired - Fee Related
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