CN216427768U - Mark projection device of buttonhole serging machine - Google Patents
Mark projection device of buttonhole serging machine Download PDFInfo
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- CN216427768U CN216427768U CN202122653372.2U CN202122653372U CN216427768U CN 216427768 U CN216427768 U CN 216427768U CN 202122653372 U CN202122653372 U CN 202122653372U CN 216427768 U CN216427768 U CN 216427768U
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Abstract
The utility model discloses an embodiment relates to a buttonhole serging machine's mark projection arrangement. The mark projection device comprises a first light projection part, a second light projection part and a third light projection part, wherein the first light projection part projects light from the back to a cloth support plate to form a linear longitudinal mark, the longitudinal mark passes through a buttonhole forming position and a needle drop position, the second light projection part and the third light projection part project light from the lateral direction of the cloth support plate to form a linear transverse mark crossed with the longitudinal mark, the transverse mark comprises a first transverse mark formed by the second light projection part and a second transverse mark formed by the third light projection part, the first transverse mark and the second transverse mark are overlapped, and the crossed point of the transverse mark and the longitudinal mark is a positioning mark. With the mark projecting device, even if the thickness of the cloth is changed, the positioning mark can be formed at the correct mark position without adjusting the setting position or the projecting angle of the mark projecting device.
Description
Technical Field
The utility model relates to a mark projection device of button hole serging machine utilizes this mark projection device to throw light to placing in the cloth of cloth bearing plate to form the location mark.
Background
In a conventional buttonholing machine, a light projection unit is provided to position a processing position of a cloth placed on a cloth support plate.
For example, patent document 1 discloses a buttonholing machine in which an optical fiber is provided in a round hole of an upper cutter, light is introduced from a light source into the optical fiber, and light is projected from the tip of the optical fiber toward a cloth immediately below the optical fiber, thereby positioning a buttonholing hole forming position. In order to position the lockstitch position (needle drop position) of the fabric, the optical fiber is set on the needle bar, the tip of the optical fiber is slightly obliquely attached to the attachment side of the sewing needle, and the needle drop position is positioned by projecting light from the tip of the optical fiber toward the fabric below.
In such a buttonholing machine, the position of the light projection part cannot be adjusted, and if the positioning function of the buttonholing position and the needle position is to be considered at the same time, it is necessary to provide the light projection part in, for example, the round hole of the upper cutter corresponding to the buttonholing position and the needle bar corresponding to the needle position, and to control the light projection operation independently, and the structure is complicated and the control is complicated. In addition, if the buttonhole forming means has a structure in which the cutter holder is provided at the upper side and the cutter is provided at the lower side, a through hole needs to be additionally provided in the cutter holder and a light projecting portion such as an optical fiber needs to be provided in the through hole, which increases the processing cost.
In order to solve the above problem, it is conceivable to provide a light projecting portion at a position other than the cutter, the cutter holder, and the needle bar, and project light obliquely from the processing position of the fabric in the lateral direction to position the buttonhole forming position or the needle dropping position. However, in the case of obliquely projecting light, if the thickness of the cloth is changed, the position of the light spot formed on the cloth is shifted accordingly. As shown in fig. 3, the solid line rectangle indicates a thin cloth, and if light (indicated by a solid line) is projected from an obliquely upper direction, a mark is formed at a position circled by the solid line. If the cloth is thick, the light projected from the same light projecting portion forms a mark at a position circled by the dotted line, as indicated by the dotted line rectangle, and the mark is deviated from the correct mark position. Therefore, the installation position or the projection angle of the light projection unit needs to be adjusted according to the thickness of the cloth.
Further, if the light projecting portion is provided at a position other than the cutter, the cutter holder, or the needle bar, the position where the light projecting portion is provided may interfere with the operation of the user. Further, when the presser foot is lifted, the surrounding members may block light from the light projecting portion, and the mark cannot be formed in this state.
Documents of the prior art
Patent document
[01] Patent document 1: chinese patent publication CN1824870A
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
An embodiment of the present invention has been made in view of the above problems, and an object of the present invention is to provide a mark projecting device for a buttonholing machine, which can be easily installed on the buttonholing machine, and the projected mark is not shifted due to the change in the thickness of the cloth, and does not interfere with the operation of the user, and the surrounding parts do not interfere with the formation of the positioning mark.
(II) technical scheme
In order to solve the above technical problem, an embodiment of the present invention provides a mark projection device of a buttonhole serging machine, the buttonhole serging machine having a front buttonholing mechanism and a rear cloth cutting mechanism, the mark projection device including a first light projection part, a second light projection part and a third light projection part, the first light projection part projecting light from a rear direction to a cloth support plate to form a linear longitudinal mark, the longitudinal mark passing through a buttonhole hole forming position and a needle dropping position, the second light projection part and the third light projection part projecting light from a lateral direction to the cloth support plate to form a linear transverse mark crossing the longitudinal mark, the transverse mark including a first transverse mark formed by the second light projection part and a second transverse mark formed by the third light projection part, the first transverse mark and the second transverse mark being overlapped with each other, the intersection of the transverse mark and the longitudinal mark becomes a positioning mark.
The vertical mark is formed by projecting light from the rear side by the first light projecting part as the vertical mark projecting part, and even if the thickness of the cloth is changed, the shift in the left-right direction is not generated. Meanwhile, the second light projection unit and the third light projection unit, which are the horizontal mark projection units, project light from the side to form the horizontal mark, so that the shift in the front-rear direction does not occur even if the thickness of the fabric is changed. Therefore, the crossing point formed by crossing the longitudinal mark and the lateral mark is used as the positioning mark, and the forming position of the positioning mark is not deviated due to the change of the thickness of the cloth.
In addition, by using two lateral mark projecting parts, namely, the second light projecting part and the third light projecting part to project light, the formed first lateral mark and the second lateral mark are overlapped with each other to form a final lateral mark, even if the light projected by one of the second light projecting part and the third light projecting part is blocked, the light can be compensated by the light projected by the other lateral mark projecting part, the finally formed lateral mark and the longitudinal mark can be ensured to be crossed, and a required positioning mark can be formed all the time. Therefore, the setting position or the projection angle of the transverse mark projection part does not need to be adjusted, the frequency of repeatedly operating the presser foot to confirm the setting position of the cloth can be reduced, the working efficiency is improved, and the burden of a user is reduced.
According to the utility model discloses an embodiment in button hole serging machine's mark projection device, first light projection sets up button hole serging machine's horn portion below is located cloth cutting mechanism's rear, second light projection with third light projection sets up with the mode that can follow the fore-and-aft direction and move the side of horn portion.
The first light projecting part forming the longitudinal mark passing through the buttonhole forming position and the needle drop position is arranged below the arm part of the buttonholing machine and behind the cloth cutting mechanism, and the first light projecting part is arranged in the middle or behind the presser foot wrists of the left and right pair of presser feet of the buttonholing machine, so that the operation of a user is not hindered.
Further, since the second light projecting unit and the third light projecting unit are attached to the side of the arm portion of the sewing machine (not shown) and have a constant height, the operation of the operation members such as the presser foot operation lever and the start operation lever is not hindered. In addition, the second light projection part and the third light projection part can move along the front-back direction, so that the forming position of the positioning mark can be freely adjusted, and different positioning requirements can be met.
According to the utility model discloses an embodiment in button hole serging machine's mark projection device, still include first light projection mounting bracket, first light projection is fixed the front end of first light projection mounting bracket, first light projection mounting bracket passes through the fastener and installs horn part below.
Therefore, the first light projection part can be easily installed on the existing button hole serging machine, and the operation of the button hole serging machine is not influenced.
According to the embodiment of the utility model, in the mark projection device of the button hole serging machine, also comprises a second light projection part mounting rack, a third light projection part mounting rack and a light projection part mounting block, the second light projection part is fixed at the front end of the second light projection part mounting rack, the third light projection part is fixed at the front end of the third light projection part mounting rack, the light projection part mounting block is mounted at the side of the machine arm part through a fastener, two through holes are provided in parallel in the light projecting part mounting block, the second light projecting part mounting block and the third light projecting part mounting block are respectively inserted into the two through holes of the light projecting part mounting block, the front and rear positions of the second light projection part are adjusted by adjusting the inserting position of the second light projection part mounting rack, the front and rear positions of the third light projection part are adjusted by adjusting the inserting position of the third light projection part mounting frame.
Therefore, the second light projection part and the third light projection part can be easily installed on the existing button hole serging machine, and the second light projection part and the third light projection part can move along the front-back direction without influencing the operation of the button hole serging machine.
According to the utility model discloses an embodiment in button hole serging machine's mark projection device, second light projection portion with third light projection portion can move between button hole mark position and needle mark position the second light projection portion with third light projection portion is located during the button hole mark position, second light projection portion with third light projection portion throws light, forms the process the horizontal mark of button hole formation position the second light projection portion with third light projection portion is located during the needle mark position, the second light projection portion with third light projection portion throws light, forms the process the horizontal mark of needle position.
Therefore, the mark projection device of the buttonhole serging machine can have the positioning function of both the buttonhole forming position and the needle drop position.
According to the utility model discloses an embodiment in the mark projection arrangement of button hole serging machine be provided with the cutter cover on the cloth bearing plate, the cutter cover is through anti-dazzle mesh processing.
Therefore, even if the longitudinal mark formed by projection of the first light projection part extends to the cutter cover on the outer side of the cloth, the cutter cover is not easy to reflect light, and the interference of the reflection light to the sight of a user is reduced.
According to the utility model discloses an embodiment in button hole serging machine's mark projection device, first light projection portion second light projection portion and third light projection portion are laser marking lamp.
Therefore, the mark projection device of the buttonholing machine can generate clear positioning marks.
According to the utility model discloses an embodiment, in the mark projection device of button hole serging machine, horizontal mark with vertical mark quadrature.
This makes it possible to form a positioning mark that is easier to recognize.
(III) advantageous effects
According to the utility model discloses an embodiment provides a button hole serging machine's mark projection arrangement, can set up on button hole serging machine easily, even the thickness of cloth changes, need not adjustment mark projection arrangement's the position of setting or throw the angle and still can form the positioning mark in exact mark position to, do not hinder user's operation, the part can not hinder the formation of positioning mark yet on every side.
Drawings
The above and other objects, features and advantages of the present disclosure will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:
fig. 1 is a schematic view of a positioning mark for forming a buttonhole forming position using an embodiment of a mark projecting device of a buttonhole serging machine according to the present invention, in which (a) is a side view, (b) is a front view, and (c) is a top view;
FIG. 2 is a schematic view showing the formation of a positioning mark of a needle-drop position by using an embodiment of a mark projecting device of a buttonholing machine according to the present invention, wherein (a) is a side view, (b) is a front view, and (c) is a top view;
fig. 3 is an explanatory view of forming a positioning mark by using a mark projecting device of a conventional buttonholing machine.
Description of the reference numerals
1: a first marker lamp (light projecting section);
2: a second marker lamp (light projecting section);
3: a third marker lamp (light projecting section);
4: an electric wire;
5: a first marker lamp mounting bracket (light projecting part mounting bracket);
6: a marker lamp mounting block (light projection unit mounting block);
7: a second marker lamp support (light projection section mounting bracket);
8: a third marker lamp support (light projection section mounting bracket);
9: a fastener;
10: a fastener;
11: a cloth cutting mechanism;
12: needle bar (lockstitch mechanism);
13: stitches (lockstitch mechanism);
14: a presser foot;
15: a cloth support plate;
16: and pressing the ankle.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are some, but not all embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative work belong to the protection scope of the present invention.
In embodiments of the invention, the terms "comprises," "comprising," "includes," "including," "has," "having," and the like, refer to the presence of stated features, elements, components, and do not preclude the presence or addition of one or more other features, elements, components, and groups thereof.
Fig. 1 and 2 schematically show an embodiment of a mark projection device of a buttonholing machine according to the present invention. The buttonhole serging machine has a cloth cutting mechanism 11 and a serging mechanism (a needle bar 12 and a sewing needle 13) arranged in front and rear. In the following description, the cloth cutting mechanism 11 side is referred to as the rear side, and the overlock mechanism (the needle bar 12 and the sewing needle 13) side is referred to as the front side. A presser foot 14 is provided at the rear of the cloth support plate 15, and the presser foot 14 has a presser foot arm 16 and a presser foot plate provided at the front end of the presser foot arm 16, and presses the cloth from above by the presser foot plate.
In the present embodiment, the marker projection device includes a first marker lamp 1 as a vertical marker projection unit, and a second marker lamp 2 and a third marker lamp 3 as a horizontal marker projection unit, and projects light from the first marker lamp 1 to form vertical markers, and projects light from the second marker lamp 2 and the third marker lamp 3 to form horizontal markers, and the vertical markers intersect the horizontal markers, and the intersection points become positioning markers.
Preferably, the longitudinal marks are orthogonal to the transverse marks, whereby more easily identifiable positioning marks can be formed.
The first marker lamp 1 is provided right behind the cloth cutting mechanism 11, and projects light from above toward the cloth support plate 15, and a linear vertical marker is formed to pass through a buttonhole forming position and a needle drop position.
As a method of attaching the first marker lamp 1, as shown in fig. 1 and 2, the first marker lamp 1 may be fixed to the front end of the first marker lamp mounting bracket 5, the first marker lamp mounting bracket 5 may be attached to a lower part of a machine arm (not shown) of the sewing machine by a fastening member 9, and the electric wire 4 of the first marker lamp 1 may be held inside the first marker lamp mounting bracket 5.
The second marker lamp 2 and the third marker lamp 3 are provided at the side of the cloth support plate 15 so as to be movable in the front-rear direction, and project light from above toward the cloth support plate 15, and linear horizontal markers including a first horizontal marker formed by the second marker lamp 2 and a second horizontal marker formed by the third marker lamp 3 are formed so as to intersect with the vertical markers, and the first horizontal marker and the second horizontal marker overlap with each other.
As shown in fig. 1 and 2, as a mounting method of the second marker lamp 2 and the third marker lamp 3, the second marker lamp 2 is fixed to the front end of the second marker lamp holder 7, the third marker lamp 3 is fixed to the front end of the third marker lamp holder 8, two through holes are provided in parallel in the marker lamp mounting block 6, the second marker lamp holder 7 and the third marker lamp holder 8 are respectively inserted into the two through holes of the marker lamp mounting block 6, and the marker lamp mounting block 6 is mounted on the side of the arm portion (not shown) of the sewing machine by the fastener 10. The front-rear position of the second marker light 2 is adjusted by adjusting the insertion position of the second marker light bracket 7, and the front-rear position of the third marker light 3 is adjusted by adjusting the insertion position of the third marker light bracket 8.
The above shows an embodiment in which the second marker lamp 2 and the third marker lamp 3 are installed on the same side of the cloth support plate 15, but the marker projection device of the buttonholing machine of the present invention is not limited thereto as long as the first transverse marker and the second transverse marker formed by the second marker lamp 2 and the third marker lamp 3 coincide with each other to form a final transverse marker, which can intersect with the longitudinal marker.
According to the mark projection device of the buttonholing machine of the present embodiment, the first mark lamp 1 projects light from the rear as the vertical mark projection part to form the vertical mark, and even if the thickness of the cloth is changed, the shift in the left-right direction is not generated. Meanwhile, the second marker lamp 2 and the third marker lamp 3 form a lateral marker by projecting light from the side as a lateral marker projecting portion, and even if the thickness of the cloth is changed, the shift in the front-rear direction does not occur. Therefore, the crossing point formed by crossing the longitudinal mark and the lateral mark is used as the positioning mark, and the forming position of the positioning mark is not deviated due to the change of the thickness of the cloth.
When the positioning mark of the buttonhole forming position is formed by the mark projecting device of the buttonhole serging machine of the present embodiment, as shown in fig. 1 (a) and (c), the front and rear positions of the second mark lamp 2 and the third mark lamp 3 are adjusted to be located on the side of the buttonhole forming position (the cloth cutting mechanism 11), and the horizontal mark formed by overlapping the first horizontal mark and the second horizontal mark passes through the buttonhole forming position and intersects the vertical mark, and the intersection point becomes the positioning mark of the buttonhole forming position.
At this time, the first marker light 1 is positioned between the presser foot wrists 16 of the pair of presser feet 14, and does not interfere with the operation of the user.
When the positioning mark of the needle drop position is formed by the mark projecting device of the buttonholing machine of the present embodiment, as shown in fig. 2 (a) and (c), the front and rear positions of the second mark lamp 2 and the third mark lamp 3 are adjusted to be located at the side of the needle drop position (the needle bar 12 and the sewing needle 13), the horizontal mark formed by overlapping the first horizontal mark and the second horizontal mark passes through the needle drop position and crosses the vertical mark, and the crossing point becomes the positioning mark of the needle drop position.
At this time, the first marker light 1 is away from the presser foot 14 (presser foot wrist 16) and does not interfere with the operation of the user.
By using two lateral mark projecting portions, that is, the second mark lamp 2 and the third mark lamp 3, although the second mark lamp 2 and the third mark lamp 3 are located at the side of the presser foot 14, the rising or falling of the presser foot 14 may block a part of the light projected by the second mark lamp 2 or a part of the light projected by the third mark lamp 3, but according to the present embodiment, the first lateral mark and the second lateral mark formed by the light projected by the second mark lamp 2 and the third mark lamp 3 overlap each other to form the final lateral mark, and even if the light projected by one of the second mark lamp 2 and the third mark lamp 3 is blocked, the light projected by the other lateral mark projecting portion can be compensated, and the crossing of the final lateral mark and the longitudinal mark can be ensured, and the desired positioning mark can be always formed. Therefore, the setting position or the projection angle of the transverse mark projection part does not need to be adjusted, the frequency of repeatedly operating the presser foot to confirm the cloth setting position can be reduced, the working efficiency is improved, and the burden of a user is lightened.
Further, since the second marker lamp 2 and the third marker lamp 3 are attached to the side of the arm portion (not shown) of the sewing machine and have a constant height, even if the second marker lamp 2 and/or the third marker lamp 3 is positioned on the side where the operation member such as the presser foot operation lever or the start operation lever is provided, the operation of each operation member is not hindered.
Although not shown, a cutter cover is further provided on the cloth support plate. Preferably, the cutter cover is anti-glare treated to provide anti-glare properties. Therefore, even if the longitudinal mark formed by projecting light by the first mark lamp 1 extends to the cutter cover on the outer side of the cloth, the light is not easy to reflect, and the interference of the light reflection to the sight of a user is reduced.
In the present embodiment, the second marker lamp 2 and the third marker lamp 3 are movable between the buttonhole mark position and the needle drop mark position, and when the second marker lamp 2 and the third marker lamp 3 are located at the buttonhole mark position, a horizontal mark passing through the buttonhole hole position can be formed, and when the second marker lamp 2 and the third marker lamp 3 are located at the needle drop mark position, a horizontal mark passing through the needle drop position can be formed. Therefore, the mark projection device of the buttonholing machine of the embodiment can have the positioning function of the buttonholing hole forming position and the needle drop position at the same time.
The first marker lamp 1, the second marker lamp 2, and the third marker lamp 3 as the light projection unit may employ laser marker lamps. The laser marking lamp has the characteristics of high directivity, high monochromaticity and high energy, and can generate clear positioning marks. However, the light projection unit is not limited thereto as long as the light can be projected to form linear marks.
To sum up, the embodiment of the utility model provides a mark projection device of button hole serging machine, including first light projection portion, second light projection portion and third light projection portion, first light projection portion throws light from the rear to the cloth bearing plate, form linear vertical mark, this vertical mark passes through button hole formation position and needle position, second light projection portion and third light projection portion throw light from the side direction cloth bearing plate, form the linear horizontal mark that intersects with vertical mark, horizontal mark includes the first horizontal mark that is formed by second light projection portion and the second horizontal mark that is formed by third light projection portion, first horizontal mark and the horizontal mark of second coincide each other, the crossing of horizontal mark and vertical mark becomes the alignment mark. The utility model discloses an embodiment's button hole serging machine's mark projection arrangement can set up on button hole serging machine easily, even the thickness of cloth changes, need not adjustment mark projection arrangement's the position of setting or throw the angle and still can form the positioning mark in the exact mark position to, do not hinder user's operation, the part can not hinder the formation of positioning mark yet on every side.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: the technical solutions described in the foregoing embodiments may be modified or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (8)
1. A mark projection device of a buttonhole serging machine, the buttonhole serging machine is provided with a serging mechanism arranged at the front and a cloth cutting mechanism arranged at the rear,
comprises a first light projecting part, a second light projecting part and a third light projecting part,
the first light projection part projects light to the cloth support plate from the rear to form a linear longitudinal mark, the longitudinal mark passes through a buttonhole forming position and a needle dropping position,
the second light projecting unit and the third light projecting unit project light from a lateral direction toward the fabric support plate to form linear lateral marks intersecting the longitudinal marks, the lateral marks include a first lateral mark formed by the second light projecting unit and a second lateral mark formed by the third light projecting unit, the first lateral mark and the second lateral mark overlap each other, and an intersection of the lateral mark and the longitudinal mark serves as a positioning mark.
2. The mark projection device for a buttonholing machine according to claim 1, wherein the first light projection unit is provided below an arm unit of the buttonholing machine and behind the cloth cutting mechanism, and the second light projection unit and the third light projection unit are provided on a side of the arm unit so as to be movable in a front-rear direction.
3. The mark projecting device of a buttonhole serging machine according to claim 2, further comprising a first light projecting part mounting bracket fixed to a front end of said first light projecting part mounting bracket, said first light projecting part mounting bracket being mounted below said arm part by a fastener.
4. The mark projecting device of a buttonhole serging machine according to claim 2 or 3, further comprising a second light projection mounting block, a third light projection mounting block and a light projection mounting block,
the second light projecting part is fixed at the front end of the second light projecting part mounting rack, the third light projecting part is fixed at the front end of the third light projecting part mounting rack,
the light projection part mounting block is mounted on the side of the arm part through a fastener, two through holes are arranged in parallel in the light projection part mounting block, the second light projection part mounting frame and the third light projection part mounting frame are respectively inserted into the two through holes of the light projection part mounting block,
the front and rear positions of the second light projection part are adjusted by adjusting the insertion position of the second light projection part mounting bracket, and the front and rear positions of the third light projection part are adjusted by adjusting the insertion position of the third light projection part mounting bracket.
5. The mark projecting device of a buttonholing machine according to claim 2, wherein the second light projection part and the third light projection part are movable between a buttonhole mark position and a needle drop mark position,
when the second light projection part and the third light projection part are positioned at the buttonhole forming position, the second light projection part and the third light projection part project light to form a transverse mark passing through the buttonhole forming position,
when the second light projection part and the third light projection part are positioned at the needle drop mark position, the second light projection part and the third light projection part project light to form a transverse mark passing through the needle drop position.
6. The mark projection device of a buttonholing machine according to claim 1, wherein a cutter cover is provided on the cloth support plate, and the cutter cover is anti-glare.
7. The mark projecting device of a buttonholing machine according to claim 1, wherein the first light projection part, the second light projection part, and the third light projection part are laser mark lamps.
8. The mark projection device of a buttonholing machine according to claim 1, wherein the transverse mark is orthogonal to the longitudinal mark.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122653372.2U CN216427768U (en) | 2021-11-02 | 2021-11-02 | Mark projection device of buttonhole serging machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122653372.2U CN216427768U (en) | 2021-11-02 | 2021-11-02 | Mark projection device of buttonhole serging machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216427768U true CN216427768U (en) | 2022-05-03 |
Family
ID=81335969
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122653372.2U Active CN216427768U (en) | 2021-11-02 | 2021-11-02 | Mark projection device of buttonhole serging machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216427768U (en) |
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2021
- 2021-11-02 CN CN202122653372.2U patent/CN216427768U/en active Active
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