CN218413441U - Connecting device - Google Patents
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- CN218413441U CN218413441U CN202221911940.2U CN202221911940U CN218413441U CN 218413441 U CN218413441 U CN 218413441U CN 202221911940 U CN202221911940 U CN 202221911940U CN 218413441 U CN218413441 U CN 218413441U
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Abstract
The utility model provides a connecting device, this connecting device includes: the conductive wire, the conductive piece and the connecting piece; wherein the conductive member includes a conductive portion for contacting the skin of the user; the connecting piece comprises an electrical connecting part which is used for electrically connecting with a ground wire of the touch terminal; the electric connection part of the connecting piece is electrically connected with the conductive part of the conductive piece through a wire; when the connecting piece is electrically connected and conducted with the touch terminal and the conductive part of the conductive piece is contacted with the skin of a user, the touch terminal and the user are in a common ground state. The connecting piece is electrically connected with the touch terminal, and when the conductive part of the conductive piece is contacted with the skin of a user, the touch terminal and the user are in a common-ground state, so that the problem of common-mode interference caused by the fact that the skin of the user and a handwriting pen are simultaneously contacted with a touch screen when the touch terminal has a voltage instability phenomenon can be effectively prevented, and the phenomenon that the handwriting pen shakes or cannot write when the handwriting pen touches the touch terminal is prevented.
Description
Technical Field
The utility model relates to a touch-control technical field especially relates to a connecting device.
Background
With the continuous development of touch screen technology, capacitive touch screens occupy the mainstream market due to the advantages of long service life, low power consumption and the like compared with resistive touch screens. At present, a capacitive touch screen supports two touch input modes of finger touch and stylus touch so as to conveniently and flexibly meet the requirements of users. However, when the capacitive touch screen is in a stylus pen touch input state, if the touch terminal is in a charging state, the corresponding voltage is unstable, and at this time, if the skin of the user and the stylus pen simultaneously contact the touch screen, common mode interference may be caused. The phenomenon that the handwriting pen shakes or even cannot write during touch input is caused.
Therefore, how to prevent the common mode interference of the stylus touch input is an urgent technical problem to be solved.
SUMMERY OF THE UTILITY MODEL
The utility model provides a connecting device, including the wire, electrically conductive piece and connecting piece, be connected with touch terminal electricity through the connecting piece and switch on, and when electrically conductive part and user skin contact of electrically conductive piece, make touch terminal and user be in state altogether, can prevent effectively that user's skin from to the common mode interference problem that the handwriting pen caused, aim at preventing that the phenomenon that the handwriting pen appears shaking or can't write when touching input to touch terminal, improve the stability and the efficiency of handwriting pen touch input.
An embodiment of the utility model provides a connecting device, connecting device includes:
a wire;
an electrically conductive member including an electrically conductive portion for contacting a user's skin;
the connecting piece comprises an electrical connecting part which is used for electrically connecting with a ground wire of the touch terminal;
the electrical connection part of the connecting piece is electrically connected with the conductive part of the conductive piece through the lead;
when the connecting piece is electrically connected and conducted with the touch terminal and the conductive part of the conductive piece is contacted with the skin of a user, the touch terminal and the user are in a common ground state.
An embodiment of the utility model provides a connecting device, include: the conductive wire, the conductive piece and the connecting piece; wherein the conductive member includes a conductive portion for contacting the skin of the user; the connecting piece comprises an electrical connecting part which is used for electrically connecting with the ground wire of the touch terminal; the electrical connection part of the connecting piece is electrically connected with the conductive part of the conductive piece through a wire; when the connecting piece is electrically connected and conducted with the touch terminal and the conductive part of the conductive piece is contacted with the skin of a user, the touch terminal and the user are in a common ground state. The connecting piece is electrically connected with the touch terminal, and when the conductive part of the conductive piece is in contact with the skin of a user, the touch terminal and the user are in a common-ground state, so that the problem of common-mode interference caused by the fact that the skin of the user and a handwriting pen simultaneously contact a touch screen when the touch terminal has a voltage instability phenomenon can be effectively solved, the phenomenon of shaking or incapability of writing when the handwriting pen touches the touch terminal is prevented, and the stability and the efficiency of touch input of the handwriting pen are improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without any creative effort.
FIG. 1 is a diagram illustrating a conventional stylus pen performing touch input;
FIG. 2 is a schematic diagram of a stylus generating common mode interference;
fig. 3 is a schematic view of a connection device according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a stylus generating a differential mode signal;
fig. 5 is a schematic view of a connecting device according to another embodiment of the present invention;
fig. 6 is a schematic view illustrating a connection between a bracelet and a touch terminal according to an embodiment of the present invention;
the handwriting pen comprises a handwriting pen 10, a pen holder 101, a touch pen point 102 and a handheld part 1011;
a first conductive connection layer 1071, a first outer conductive layer 1072, a first inner conductive connection layer 1073;
a conductive line 103, a conductive member 104, a conductive portion 1041;
a connector 105, an electrical connection 1051, a left channel 1052, a right channel 1053, and a ground line 1054;
the bracelet 108, the annular body 1081, the second conductive connecting layer 1082, the second outer conductive layer 1083, and the second inner conductive connecting layer 1084;
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The flow diagrams depicted in the figures are merely illustrative and do not necessarily include all of the elements and operations/steps, nor do they necessarily have to be performed in the order depicted. For example, some operations/steps may be decomposed, combined or partially combined, so that the actual execution sequence may be changed according to the actual situation.
It is to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
An embodiment of the utility model provides a connecting device, include: the conductive wire, the conductive piece and the connecting piece; wherein the conductive member includes a conductive portion for contacting the skin of the user; the connecting piece comprises an electrical connecting part which is used for electrically connecting with a ground wire of the touch terminal; the electric connection part of the connecting piece is electrically connected with the conductive part of the conductive piece through a wire; when the connecting piece is electrically connected and conducted with the touch terminal and the conductive part of the conductive piece is contacted with the skin of a user, the touch terminal and the user are in a common ground state. The connecting piece is electrically connected with the touch terminal, and when the conductive part of the conductive piece is in contact with the skin of a user, the touch terminal and the user are in a common-ground state, so that the problem of common-mode interference caused by the fact that the skin of the user and a handwriting pen simultaneously contact a touch screen when the touch terminal has a voltage instability phenomenon can be effectively solved, the phenomenon of shaking or incapability of writing when the handwriting pen touches the touch terminal is prevented, and the stability and the efficiency of touch input of the handwriting pen are improved.
Specifically, before explaining the connection device provided by the present invention, the principle of generating common mode interference by the stylus pen in the prior art is first exemplarily explained with reference to fig. 1 and fig. 2.
Referring to fig. 1, fig. 1 is a schematic diagram illustrating a conventional stylus pen performing touch input.
As shown in fig. 1, the conventional handwriting pen 10 includes a pen shaft 101 and a touch pen tip 102. Specifically, when the stylus pen 10 is in a working state, when the touch pen point 102 of the stylus pen 10 contacts the capacitive touch screen 201 of the touch terminal 20, the stylus pen 10 sends a signal to the outside, the touch terminal 20 collects the signal sent by the stylus pen 10 through the capacitive touch screen 201 sensor, and controls the capacitive touch screen 201 to switch to a state of receiving the signal under a corresponding protocol according to the state of sending the signal by the stylus pen 10, and controls the capacitive touch screen 201 to enter a mode of supporting the stylus pen 10 to touch and write according to the state of the signal.
And usually, when the capacitive touch screen 201 enters an input mode, a human hand also contacts the surface of the capacitive touch screen 201. For example, when the touch terminal 20 is placed on a wooden or plastic desktop, the user is used to touch the capacitive touch screen 201 with the left hand, hold the stylus pen 10 with the right hand for writing, or simultaneously touch the capacitive touch screen 201 with the bottom of the hand while writing with the stylus pen 10 held by the right hand. When a human hand touches the surface of the capacitive touch screen 201, since the ground formed by the human hand is not the same ground as the reference ground of the touch terminal 20 itself, the ground represented by the human hand may cause large common-mode interference when the touch screen sensor collects signals. Especially, when the touch terminal 20 is charged by a charger, the voltage instability is serious, and the skin of the user and the stylus pen touch the touch screen at the same time, which may cause a serious common mode interference problem.
Specifically, as shown in fig. 2, fig. 2 is a schematic diagram illustrating a principle that the stylus generates common mode interference. As can be seen from fig. 2, when the touch terminal 20 is charged by accessing a charger, if a human hand touches the capacitive touch screen 201 and the human hand is used as the ground, the power supply signal 202 on the capacitive touch screen 201 and the touch terminal reference ground signal 203 are both connected to the ground after capacitive coupling, and an interference signal generated by power supply on the capacitive touch screen 201 is different from a capacitance formed by taking a human body as a reference ground (e.g., a capacitance Cy2 in fig. 2), and an interference signal generated on the reference ground of the touch terminal 20 is different from a capacitance formed by taking the human body as a reference ground (e.g., a capacitance Cy1 in fig. 2), so that the interference signals on the capacitive touch screen 201 and the reference ground of the touch terminal 20 have different magnitudes, and a large interference signal appears on the capacitive touch screen 201. Therefore, a relatively obvious common mode interference problem may occur, and if the touch terminal 20 is in a floating state during charging or the charging power supply voltage is unstable, the hand and the stylus pen 10 simultaneously contact the screen of the capacitive touch screen 201, which may cause the stylus pen 10 to generate a phenomenon of line drawing jitter or inability to write on the capacitive touch screen 201.
In order to solve the above technical problem, this embodiment provides a connection device, which can effectively prevent the common mode interference problem caused by the fact that the skin of a user and a stylus pen simultaneously contact a touch screen when the touch terminal has a voltage instability phenomenon, and aims to prevent the phenomenon that the stylus pen shakes or cannot write when touching and inputting to the touch terminal, and improve the stability and efficiency of the touch input of the stylus pen.
Some embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
Referring to fig. 3, fig. 3 is a schematic view of a connection device according to an embodiment of the present invention.
As shown in fig. 3, the connection device provided by the embodiment of the present invention includes a wire 103; conductors 104, conductors 104 including conductive portions 1041 for contact with the skin of the user; the connecting piece 105, the connecting piece 105 includes an electrical connection portion 1051 for electrically connecting with the ground line of the touch terminal 20; wherein, the electrical connection portion 1051 of the connection member 105 is electrically connected to the conductive portion 1041 of the conductive member 104 through the conductive wire 103; when the connecting member 105 is electrically connected and conducted with the touch terminal 20 and the conductive portion 1041 of the conductive member 104 is in contact with the skin of the user, the touch terminal 20 and the user are in a common ground state.
In one embodiment, the conductive member 104 is a stylus 10.
The stylus pen 10 includes a pen holder 101 and a touch pen tip 102, a handheld portion 1011 is disposed on the pen holder 101 near the touch pen tip 102, and a conductive portion 1041 is disposed on the handheld portion 1011 of the pen holder 101 near the touch pen tip 102, where the conductive portion 1041 is used for contacting with the skin of a user.
Specifically, when a user uses the stylus pen 10 to perform a touch input on the touch terminal 20, the hand of the user touches the corresponding handheld portion 1011, so that the conductive portion 1041 disposed on the handheld portion 1011 contacts the skin of the user.
It should be noted that, the utility model discloses in, the conductive part 1041 of stylus 10 can be through the electric connection portion 1051 electric connection of wire 103 with connecting piece 105, and in the use, the electric connection portion 1051 of connecting piece 105 need with touch terminal 20's ground wire electric connection, when making conductive part 1041 of conductive piece 104 and user skin contact, touch terminal 20 is in the state altogether with the user, when effectively preventing to have voltage unstability phenomenon at touch terminal, the common mode interference problem that the touch-sensitive screen caused is contacted simultaneously by user's skin and stylus, and then prevent to appear shaking or the phenomenon that can't write when stylus to touch terminal touch input through the stylus, improve stylus touch input's stability and efficiency.
In an embodiment, the conductive portion 1041 includes a first conductive connection layer 1071 exposed at the handheld portion 1011, and the first conductive connection layer 1071 may be a metal connection layer or may be formed by pressing any other conductive material. The first conductive connecting layer 1071 includes a first outer conductive layer exposed on the outer surface of the handle portion 1011 and a first inner conductive connecting layer (not shown) embedded in the inner surface of the handle portion 1011; the first outer conductive layer 1072 is used to contact the skin of the user, and the first inner conductive connecting layer 1073 is used to connect with the wire 103 and electrically connected to the electrical connecting portion 1051 of the connecting member 105 through the wire 103. When a user uses the stylus pen 10 to perform touch input, the skin of the user contacts the first conductive connecting layer 1071 exposed on the handheld portion 1011, and at this time, if the electrical connecting portion 1051 of the connecting piece 105 is electrically connected with the ground of the touch terminal 20 and the connecting piece 105 is electrically connected and conducted with the touch terminal 20, the touch terminal 20 and the user are in a common-ground state, so that the common-mode interference problem caused by the fact that the skin of the user and the stylus pen simultaneously contact the touch screen when the touch terminal has voltage instability can be effectively prevented.
It should be noted that, in the embodiment of the present invention, the connecting member includes a housing, and the electrical connecting portion is disposed inside the housing. Specifically, the electrical connection portion may be a grounding metal sheet disposed on the inner surface of the housing, and is used for electrically connecting with a ground line of the touch terminal, and is connected with the conductive portion of the conductive member through a wire.
Specifically, as can be seen from fig. 3, in the present embodiment, the connecting element 105 is an earphone plug. The headphone jack includes a left channel 1052, a right channel 1053, and a ground wire (the ground wire is the electrical connection 1051 of the headphone jack). The ground wire of the earphone plug is used as an electrical connection part and is connected with the first conductive connection layer of the handwriting pen, and after the earphone plug is inserted into the earphone hole of the touch terminal, the ground wire of the earphone plug is electrically connected with the reference ground of the touch terminal. When the stylus pen is in a capacitance touch input state, if the skin of a user is in contact with the first conductive connecting layer, the touch terminal and the user are in a common ground state. When the touch terminal and the user are in a common-ground state, the interference signal generated by the power supply line is changed into a differential mode signal, and correspondingly, when the interference signal is the differential mode signal, the signal sent to the touch screen by the handwriting pen is not interfered any more, and at the moment, even if a large interference signal exists on the power line, the writing effect of the handwriting pen is not influenced. Specifically, as shown in fig. 4, fig. 4 is a schematic diagram of the stylus generating a differential mode signal.
It should be noted that the touch terminal includes, but is not limited to, a mobile phone, a tablet computer, an intelligent handheld reader/writer, a watch, and the like.
Usually, the touch terminal has a headset jack for inserting a headset plug. The utility model provides a connecting device, borrow earphone plug as the connecting piece between stylus and touch terminal, and because there are three sections of metals on the earphone plug, three sections of metals are left passageway, right passageway and ground wire respectively; when the earphone plug is inserted into the touch terminal, such as the earphone jack of a tablet computer, the ground wire on the earphone plug is connected with the reference ground of the touch terminal. Therefore, the ground wire on the earphone plug can be connected with the reference ground of the touch terminal, and in addition, the ground wire on the earphone plug is led out to a connecting piece such as a conductive part of a handwriting pen through a lead and is contacted with the skin of a user, so that the skin of a human body is connected with the reference ground of the touch terminal, the touch terminal and the user are in a common ground state, and the problem of common-mode interference caused by the fact that the skin of the user and the handwriting pen are simultaneously contacted with a touch screen when the voltage of the touch terminal is unstable is solved.
It should be noted that, in specific implementation, the connecting element is not limited to the earphone plug provided in this embodiment, and may be any connecting element that includes a ground terminal, and the corresponding ground terminal can be electrically connected to the ground line of the touch terminal, for example, the connecting element may also be at least one of a USB plug or any plug corresponding to the touch terminal.
According to the above analysis, the utility model provides a connecting device, include: the conductive wire, the conductive piece and the connecting piece; wherein the conductive member includes a conductive portion for contacting the skin of the user; the connecting piece comprises an electrical connecting part which is used for electrically connecting with the ground wire of the touch terminal; the electric connection part of the connecting piece is electrically connected with the conductive part of the conductive piece through a wire; when the connecting piece is electrically connected and conducted with the touch terminal and the conductive part of the conductive piece is contacted with the skin of a user, the touch terminal and the user are in a common ground state. The connecting piece is electrically connected with the touch terminal, and when the conductive part of the conductive piece is in contact with the skin of a user, the touch terminal and the user are in a common-ground state, so that the problem of common-mode interference caused by the fact that the skin of the user and a handwriting pen simultaneously contact a touch screen when the touch terminal has a voltage instability phenomenon can be effectively solved, the phenomenon of shaking or incapability of writing when the handwriting pen touches the touch terminal is prevented, and the stability and the efficiency of touch input of the handwriting pen are improved.
Referring to fig. 5, fig. 5 is a schematic view of a connecting device according to another embodiment of the present invention. As can be seen from fig. 5, compared with the connection device provided in the embodiment shown in fig. 3, the connection device of the present embodiment includes a conductive wire and a connecting member that are the same as those in the embodiment shown in fig. 3, but in the present embodiment, the conductive member is a bracelet.
As shown in fig. 5, the bracelet 108 according to the embodiment of the present invention includes an annular body 1081; the annular body 1081 may be a rubber annular body or made of other soft materials. The inner surface of the annular body 1081 may be provided with a conductive portion, which may be made of a layer of conductive material, and after the user wears the bracelet, the conductive material contacts with the skin of the arm of the user to form a conductive path.
In particular implementations, the conductive portion may include a second conductive connecting layer 1082 disposed on an inner surface of the annular body 1081. The second conductive connecting layer 1082 is exposed from the second outer conductive layer on the inner surface of the annular body and the second inner conductive connecting layer embedded inside the inner surface of the annular body 1081. Wherein the second outer conductive layer and the second inner conductive connecting layer are not shown in the figure.
When a user performs touch input on the capacitive touch screen 201 of the touch terminal 20 through a stylus pen, if common mode interference is large, and writing effect of the stylus pen is affected, the user can wear the bracelet of the connection device on the arm and insert a connecting piece of the connection device, such as an earphone plug, into an earphone hole of the touch terminal, so that the inner wall of the bracelet of the connection device is in close contact with the arm of the human body to form a passage from the reference ground of the touch terminal to the ground of the human body. After the reference ground of the touch terminal is connected with the human body ground, the common-mode interference disappears, and the writing of the stylus is not interfered by the common-mode signal any more.
Specifically, in the present embodiment, the second outer conductive layer disposed on the inner wall of the bracelet 108 is used to contact the skin of the user, and the second inner conductive connecting layer is used to connect with the wire 103 and electrically connect with the electrical connecting portion 1051 of the connecting piece 105 through the wire 103. When the user nests the bracelet 108 on the arm, the second outer conductive layer exposed on the inner surface of the annular body 1081 of the bracelet 108 contacts with the arm of the user, and since the second inner conductive connecting layer embedded inside the inner surface of the annular body 1081 is electrically connected with the electrical connecting part 1051 of the connecting piece 105 through the conducting wire 103, if the electrical connecting part 1051 of the connecting piece 105 is electrically connected with the ground wire of the touch terminal 20, and the connecting piece 105 is electrically connected and conducted with the touch terminal 20, the touch terminal 20 and the user are in a common ground state. At this time, when the skin of the user is in contact with the capacitive touch screen 201 of the touch terminal 20 during touch input on the capacitive touch screen 201 of the touch terminal 20 by the common stylus pen 10, the interference signal on the capacitive touch screen 201 and the interference signal on the reference ground of the touch terminal 20 are the same as the capacitance formed by the ground due to the communication between the skin of the user and the reference ground of the touch terminal 20, so that the interference signals on the capacitive touch screen 201 and the reference ground of the touch terminal 20 have the same magnitude, and thus a differential mode signal appears on the capacitive touch screen 201. Therefore, the problem of relatively obvious common mode interference can not occur, writing of the handwriting pen on the touch screen is not affected, and the stability and the efficiency of touch input of the handwriting pen can be ensured.
That is to say, this embodiment, through setting up the conductive part at the inner wall of bracelet to when making the user overlap bracelet on the arm, the skin contact on the skin and the user's arm that is located the conductive part of bracelet inner wall and the electric connection portion on the connecting piece passes through the wire and switches on, and then when the connecting piece passes through electric connection portion and touch terminal electricity and is connected and switch on, effectively prevent handwriting pen touch input on touch terminal, when touch terminal has voltage unstability, by the common mode interference problem that the touch-sensitive screen caused is touched simultaneously to user's skin and handwriting pen. Specifically, please refer to fig. 6, wherein fig. 6 is a schematic connection diagram of a bracelet and a touch terminal according to an embodiment of the present invention.
It should be understood that the term "and/or" as used in the specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations. It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or system that comprises the element.
The above embodiment numbers of the present invention are only for description, and do not represent the advantages and disadvantages of the embodiments. The above description is only for the specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope of the present invention, and these modifications or replacements should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. A connection device, characterized in that it comprises:
a wire;
an electrically conductive member including an electrically conductive portion for contacting a user's skin;
the connecting piece comprises an electrical connecting part which is used for electrically connecting with a ground wire of the touch terminal;
the electrical connection part of the connecting piece is electrically connected with the conductive part of the conductive piece through the lead;
when the connecting piece is electrically connected and conducted with the touch terminal and the conductive part of the conductive piece is contacted with the skin of a user, the touch terminal and the user are in a common ground state.
2. The connecting device according to claim 1, wherein the conductive member comprises a bracelet or a stylus.
3. The connecting device of claim 2, wherein the stylus pen comprises a pen holder and a touch pen head, and the conducting part is arranged on a handheld part of the pen holder, which is close to the touch pen head.
4. The connection device of claim 3, wherein the conductive portion comprises a first conductive connection layer exposed at the hand-held location.
5. The connection device according to claim 2, wherein the bracelet comprises an annular body, an inner surface of which is provided with the conductive portion.
6. The connection device of claim 5, wherein the conductive portion comprises a second conductive connection layer disposed on the inner surface of the annular body.
7. The connecting device according to any one of claims 1 to 6, wherein the connecting member includes a housing, and the electrical connecting portion is provided inside the housing.
8. The connecting device of claim 7, wherein the electrical connection portion is a grounding metal plate disposed on an inner surface of the housing.
9. The connecting device of claim 7, wherein the connector comprises at least one of a headphone plug, a USB plug, and a round hole plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221911940.2U CN218413441U (en) | 2022-07-21 | 2022-07-21 | Connecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221911940.2U CN218413441U (en) | 2022-07-21 | 2022-07-21 | Connecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218413441U true CN218413441U (en) | 2023-01-31 |
Family
ID=85014198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221911940.2U Active CN218413441U (en) | 2022-07-21 | 2022-07-21 | Connecting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218413441U (en) |
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2022
- 2022-07-21 CN CN202221911940.2U patent/CN218413441U/en active Active
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