CN219742021U

CN219742021U - Watchband and heart rate monitoring watch

Info

Publication number: CN219742021U
Application number: CN202320855980.8U
Authority: CN
Inventors: 黄有军; 李波
Original assignee: Shenzhen 3g Electronics Co ltd
Current assignee: Shenzhen 3g Electronics Co ltd
Priority date: 2023-04-13
Filing date: 2023-04-13
Publication date: 2023-09-26
Anticipated expiration: 2033-04-13

Abstract

The utility model relates to a watchband and a heart rate monitoring watch, wherein the watchband comprises a band body and a heart rate component which are connected, the heart rate component comprises a heart rate base and a heart rate collector capable of collecting heart rate information, and a user can wear the heart rate component on a wrist or a body through the watchband; moreover, the heart rate subassembly can be dismantled with the electronic dial plate through the heart rate base and be connected constitutes heart rate monitoring wrist-watch, and when the electronic dial plate was installed the heart rate base, the heart rate collector can with electronic dial plate electric connection, and the electronic dial plate can show the heart rate information that the heart rate collector obtained through the electronic dial plate in order that people to self heart rate healthy's control.

Description

Watchband and heart rate monitoring watch

Technical Field

The utility model relates to the technical field of electronic products, in particular to a watchband and a heart rate monitoring watch.

Background

The intelligent watch has information processing capability and meets the basic technical requirements of the traditional mechanical watch. Along with the continuous progress of science and technology, traditional mechanical wrist-watch is replaced by intelligent wrist-watch gradually, and intelligent wrist-watch is connected in the network through at the inside intelligent hardware of planting of dial plate and carrying on smart mobile phone system, can realize its multiple functions such as conversation, SMS, receipts silver payment and audio-visual for the user can leave without carrying the cell-phone under the condition, has greatly made things convenient for people's life. Along with people's importance to health monitoring, many smart watches with health monitoring function appear on the market, for example CN204203645U just discloses a heart rate wrist-watch, but heart rate subassembly is integrated in the dial plate and can't dismantle, this makes the dial plate of this heart rate wrist-watch when mass production, leads to the cost of manufacture of dial plate to increase.

Disclosure of Invention

The utility model provides a watchband and a heart rate monitoring watch, which aim to solve the technical problem that the manufacturing cost of a dial plate of an intelligent watch with a heart rate monitoring function is increased when the dial plate is produced in mass.

In order to solve the technical problems, the utility model adopts the following technical scheme:

in a first aspect, the present utility model provides a heart rate monitoring wristwatch comprising:

the belt body is worn by a user;

the heart rate subassembly, including heart rate base, heart rate collector and conductive terminal, the heart rate base with the area body coupling, the heart rate collector with conductive terminal set up in the heart rate base, the heart rate collector with conductive terminal electric connection, the heart rate collector is used for gathering heart rate information, conductive terminal is used for dismantling electric connection electronic dial plate, in order to pass through the electronic dial plate presents heart rate information.

In one embodiment, one end of the heart rate base is provided with an adapter, the adapter comprises an adapter seat and an adapter shaft, the adapter seat is provided with a shaft hole capable of aligning with a connecting hole of the electronic dial plate, and the adapter shaft can penetrate through the shaft hole and the connecting hole so as to enable the electronic dial plate to be installed on the heart rate base and rotate relative to the heart rate base.

In one embodiment, the heart rate base encloses and closes and form spacing chamber, spacing chamber is used for accomodating the electronic dial plate, conductive terminal expose in the diapire in spacing chamber, the heart rate collector is located heart rate base is dorsad spacing chamber's one side.

In one embodiment, the heart rate assembly further comprises a flexible circuit board, the heart rate base is provided with a containing cavity, the flexible circuit board is covered and limited in the containing cavity, and the flexible circuit board is electrically connected with the heart rate collector and the conductive terminals.

In a second aspect, the present utility model provides a heart rate monitoring wristwatch comprising:

the wristband of any one of the preceding claims;

and the electronic dial is detachably connected with the heart rate base and is detachably and electrically connected with the conductive terminal.

In a third aspect, the present utility model provides a heart rate monitoring wristwatch comprising:

the belt body is worn by a user;

the heart rate assembly comprises a heart rate base, a heart rate collector and a conductive terminal, wherein the heart rate base is connected with the belt body, the heart rate collector and the conductive terminal are arranged on the heart rate base, the heart rate collector is electrically connected with the conductive terminal, and the heart rate collector is used for collecting heart rate information;

the electronic dial is electrically connected with the conductive terminal so as to display heart rate information through the electronic dial; the electronic dial is also rotationally connected with the heart rate base so as to be detached from the conductive terminal.

In one embodiment, the electronic dial can be turned around one side of the heart rate base relative to the heart rate base, so that the electronic dial is switched between being connected in an angled state with the heart rate base and being covered with the heart rate base.

In one embodiment, the heart rate monitoring watch further comprises a main control board, wherein the main control board is arranged in the electronic dial, and when the electronic dial is covered on the heart rate base, the main control board is electrically connected with the conductive terminal; when the electronic dial plate is connected with the heart rate base in an included angle state, the main control board is electrically disconnected with the conductive terminal.

In one embodiment, the electronic dial further comprises a first display screen and a second display screen which are oppositely arranged, the second display screen is arranged on one side of the electronic dial close to the conductive terminal, and the first display screen is arranged on one side of the electronic dial away from the second display screen; the first display screen can display heart rate information, and the second display screen can display shooting pictures.

In one embodiment, the heart rate assembly further comprises a magnetic attraction piece arranged on the heart rate base, when the electronic dial plate rotates to a preset position in a direction close to the conductive terminal, the magnetic attraction piece can magnetically attract the electronic dial plate so that the electronic dial plate covers the heart rate base, and the magnetic attraction piece can trigger a switch of the electronic dial plate at the same time so as to close the second display screen and open the first display screen.

As can be seen from the technical scheme, the embodiment of the utility model has at least the following advantages and positive effects:

the heart rate monitoring watch comprises a belt body, a heart rate component and an electronic dial, wherein the belt body can be worn by a user, the heart rate component can collect heart rate information, and the electronic dial can display the heart rate information through being electrically connected with the heart rate component. Therefore, the belt body and the heart rate component form a wearable watchband for collecting heart rate information, and because the heart rate component is detachably connected with the electronic dial, compared with a heart rate watch with the heart rate component disclosed by the patent CN204203645U which is completely integrated in the dial, the heart rate component provided by the utility model exists because the heart rate component is independent of the electronic dial of the intelligent watch, so that the heart rate collecting function of the heart rate component is not influenced by the electronic dial, and on one hand, when the electronic dial is damaged, the heart rate component can replace a new electronic dial to continue to use the heart rate monitoring function; on the other hand, the electronic dial plate of the heart rate monitoring watch provided by the utility model does not need an internal heart rate component during mass production, so that the manufacturing cost of the electronic dial plate is lower.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a heart rate monitor wristwatch according to an embodiment of the present utility model in an unfolded state;

FIG. 2 is a schematic view of a heart rate monitor wristwatch according to an embodiment of the present utility model;

FIG. 3 is a schematic view of a wristband in the heart rate monitor watch of FIG. 1;

FIG. 4 is a schematic view of an exploded view of the wristband of FIG. 3;

FIG. 5 is a schematic cross-sectional view of the heart rate monitor wristwatch of FIG. 2 along line A-A;

fig. 6 is a schematic diagram of an exploded structure of the heart rate monitor wristwatch shown in fig. 2.

The reference numerals are explained as follows:

12. heart rate monitoring watches; 10. a heart rate component; 110. a belt body; 111. a first belt body; 1111. perforating; 112. a second belt body; 1121. a buckle; 1122. a slide block; 120. a heart rate component; 121. a heart rate base; 1211. a receiving chamber; 1212. an adapter; 1212a, adaptor; 1212b, a spindle; 1212c, shaft hole; 1212d, a first screw; 1212e, a second screw; 1213. a spacing cavity; 1214. a storage groove; 122. a heart rate collector; 123. a conductive terminal; 124. a flexible circuit board; 125. a magnetic attraction piece; 1251. a magnet; 1252. a cushion pad; 20. an electronic dial; 210. a watch frame; 211. a middle frame; 2111. a connecting block; 212. a bottom frame; 2121. a jack; 220. a main control board; 230. a display screen; 231. a first display screen; 232. a second display screen; 2321. a camera; 240. and (5) a thimble.

Detailed Description

Exemplary embodiments that embody features and advantages of the present utility model will be described in detail in the following description. It will be understood that the utility model is capable of various modifications in various embodiments, all without departing from the scope of the utility model, and that the description and illustrations herein are intended to be by way of illustration only and not to be construed as limiting the utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the description of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "disposed," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; the mechanical connection and the electrical connection can be adopted; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Referring to fig. 1, the utility model provides a heart rate monitoring watch 12, which comprises a watchband 10 and an electronic dial 20 which are detachably connected, wherein the watchband 10 can collect heart rate information, the electronic dial 20 can receive and display the heart rate information, and the heart rate monitoring watch 12 is convenient for a user to carry and wear, so that the user can obtain a heart rate detection result of the user at any time and any place, and monitor and hold heart rate related health information of the user. In the present utility model, the wristband 10 includes a band 110 and a heart rate assembly 120, the band 110 is detachably connected to opposite sides of the heart rate assembly 120, and the electronic dial 20 is detachably rotatably connected to the heart rate base 120.

Referring to fig. 1 and 2 in combination, because the electronic dial 20 is rotatably connected to the heart rate assembly 120, the electronic dial 20 is switched between a state in which it is in an angle with the heart rate assembly 120 (as shown in fig. 1) and a state in which it covers the heart rate assembly 120 (as shown in fig. 2). Because the heart rate component 120 is detachably connected with the electronic dial 20, compared with a heart rate watch with the heart rate component 120 integrated in the dial 20 disclosed in the patent CN204203645U, the heart rate component 120 provided by the utility model is independent of the electronic dial 20 of the intelligent watch, so that the heart rate acquisition function of the heart rate component 120 is not influenced by the electronic dial 20, and on one hand, when the electronic dial 20 is damaged, the heart rate component 120 can replace a new electronic dial to continue to use the heart rate monitoring function; on the other hand, the electronic dial 20 of the heart rate monitoring watch 12 provided by the utility model does not need to be internally provided with the heart rate component 120 during mass production, so that the manufacturing cost of the electronic dial 20 is lower. It should be understood that in other embodiments, the heart rate module 120 of the present utility model may not be connected to the electronic dial 20, but may be connected to other external electronic devices with heart rate information processing feedback devices to implement the heart rate monitoring function. In addition, the electronic dial 20 mounted on the heart rate assembly 120 may be configured to be non-rotatable with respect to the heart rate assembly 120, so long as a detachable connection is achieved.

Referring to fig. 3, the band 110 of the watchband 10 can be enclosed to form a wearable cavity with a variable size for a user to wear, specifically, the band 110 includes a first band 111 and a second band 112 connected to opposite sides of the heart rate component 120, the first band is provided with a through hole 1111, the second band 112 is provided with a buckle 1121 and a slider 1122, the through hole 1111 is matched with the buckle 1121 to connect the first band 111 and the second band 112, the slider 1122 is slidably connected to the second band 112, the buckle 1121 can be connected to the through holes 1111 at different positions in a clamping manner to change the size of the wearable cavity of the band 110, and then the first band 111 is attached to the second band 112 through the slider 1122 so as to wear beautiful. It should be noted that, the belt body 110 is just one way to implement the wearable heart rate assembly 120 in the present utility model, and in other embodiments, the belt body 120 may be connected to the heart rate assembly 120, or may be a wearable accessory such as a bracelet, a chain, etc.

Referring to fig. 3 and 4 in combination, the heart rate assembly 120 includes a heart rate base 121, a heart rate collector 122 and a conductive terminal 123, the heart rate base 121 is connected with the belt body 110, the heart rate collector 122 and the conductive terminal 123 are disposed on the heart rate base 121, the heart rate collector 122 is electrically connected with the conductive terminal 123, the heart rate collector 122 is used for collecting heart rate information, the heart rate collector 122 can be of any type known in the market, for example, the heart rate collector 122 can be of the type Ai Puke micro 7128. The conductive terminal 123 is detachably and electrically connected to the electronic dial 20 to present heart rate information through the electronic dial 20. The heart rate assembly 120 further comprises a flexible circuit board 124, the flexible circuit board 124 is electrically connected with the conductive terminal 123, fig. 3 illustrates that the heart rate base 121 is provided with a containing cavity 1211, the flexible circuit board 124 and the conductive terminal 123 are limited in the containing cavity 1211, and fig. 5 illustrates that the heart rate collector 122 is covered by the flexible circuit board 124 and is limited and hidden in the containing cavity 1211 to realize the electrical connection of the heart rate collector 122 and the flexible circuit board 124, so that the heart rate collector 122 is electrically connected with the conductive terminal 123 through the flexible circuit board 124. It should be understood that, in other embodiments, the flexible circuit board 124 may not be provided in the heart rate assembly 120, and the heart rate collector 122 may be exposed to the air without being hidden and protected, so long as the electrical connection between the heart rate collector 122 and the conductive terminal 123 is satisfied.

One end of the heart rate base 121 of the utility model is also provided with a adaptor 1212, the adaptor 1212 is used for connecting the heart rate assembly 120 with the electronic dial 20, fig. 1 illustrates that the heart rate base 121 and the electronic dial 20 are rotationally connected through the adaptor 1212, and the electronic dial 20 can turn around the adaptor 1212 relative to the heart rate base 121, so that the electronic dial 20 is switched between a state of being connected with the heart rate base 121 in an included angle state and a state of limiting the electronic dial 20 to the heart rate base 121 in a covering manner. Fig. 1 illustrates that the electronic dial 20 is connected to the heart rate base 121 in an angle state, and the electronic dial 20 is electrically disconnected from the conductive terminal 123 in the heart rate assembly 120; fig. 2 illustrates that the electronic dial 20 covers the heart rate base 121, and the electronic dial 20 is electrically connected to the conductive terminals 123 in the heart rate assembly 120. In order to enable the electronic dial 20 to be attached to the heart rate base 121, fig. 3 illustrates that the heart rate base 121 encloses a limiting cavity 1213, and fig. 5 illustrates that the electronic dial 20 can be covered and limited in the limiting cavity 1213.

Referring to fig. 1 and 3, the adaptor 1212 includes a adaptor holder 1212a and a adaptor shaft 1212b, wherein the adaptor holder 1212a is connected to the heart rate base 121 and has a shaft hole 1212c, and the shaft hole 1212c is configured to pass through the adaptor shaft 1212 b. One side of the electronic dial 20 is provided with a connecting hole 2111 aligned with the shaft hole 1212c, and the adapter shaft 1212b can be arranged through the connecting hole 2111 and the shaft hole 1212c, so that the electronic dial 20 is rotationally connected to one end of the heart rate base 121 through the adapter 1211, and the electronic dial 20 can turn around the adapter shaft 1212b relative to the heart rate base 121. In addition, the adapter shaft 1212b is detachable from the connection hole 2111 of the electronic dial 20, thereby realizing detachable rotational connection of the electronic dial 20 and the heart rate base 121. It should be understood that the mating connection of the adaptor 1212 with the connection bore 2111 is only one embodiment of a detachable rotational connection, and other connection arrangements are possible in other embodiments.

Referring to fig. 5, the adaptor 1212 further includes a first screw 1212d and a second screw 1212e, the first screw 1212d passes through the heart rate base 121 along the thickness direction of the heart rate base 121 and abuts against the adaptor 1212a, and the second screw 1212e passes through the adaptor 1212a and the first screw 1212d along the thickness direction perpendicular to the heart rate base 121, so as to detachably connect the adaptor 1212 to the heart rate base 121 through the adaptor 1212a, thereby detachably connecting the electronic dial 20 to one side of the heart rate base 121 through the adaptor 1212. It should be understood that in other embodiments, the adaptor 1212 may be fixedly connected to the heart rate base 121, and the adaptor 1212 in the present utility model is detachably connected to the heart rate base 121 through the first screw 1212d and the second screw 1212e, so that on one hand, a detachable connection manner between the heart rate base 121 and the electronic dial 20 is increased, and on the other hand, the part structure is thinned, so as to facilitate maintenance. It should be understood that in other embodiments, the connection manner of the adaptor 1212 and the heart rate base 121 is not limited, and the adaptor 1212 may be mounted on the heart rate base 121 by other detachable connection manners, or may be fixedly connected to the heart rate base 121.

Referring to fig. 5 and 6 in combination, the electronic dial 20 includes a bezel 210, a main control board 220, and a display screen 230. Fig. 5 illustrates that one side of the bezel 210 is rotatably connected with the heart rate base 121 through the adaptor 1212, the main control board 220 is disposed in the bezel 210 and electrically connected with the display screen 230, and the display screen 230 covers the bezel 210. The watch box 210 includes a middle box 211 and a bottom box 212, the middle box 211 is rotatably connected with the heart rate base 121 through a connection hole 2111 (the connection hole 2111 is disposed at one side of the middle box 211), and a hole or slot structure is further formed on a side surface of the middle box 211 for allowing functional buttons such as a crown to pass through and be electrically connected with the main control board 220. The bottom frame 212 is detachably covered on one surface of the middle frame 211, which is close to the heart rate assembly 120, and the bottom frame 212 is provided with a jack 2121 aligned with the electric shock end of the conductive terminal 123, wherein the jack 2121 is used for inserting the thimble 240 to penetrate through the bottom frame 212. When the electronic dial 20 is covered on the heart rate base 121, the conductive terminal 123 abuts against the thimble 240 and is electrically connected to the main control board 220, the heart rate information collected by the heart rate assembly 120 can be fed back to the main control board 220, and the main control board 220 processes the information and then displays heart rate data through the display screen 230. When the electronic dial 20 is turned over and is in an included angle state with the heart rate base 121, the conductive terminal 123 is separated from the thimble 240 and is electrically disconnected from the main control board 220, and the electronic dial 20 becomes a conventional smart watch. It should be understood that the manner of electrical connection of the pins is only one embodiment of the present utility model, and other embodiments may also be implemented by other electrical connection manners, such as a flexible flat cable, a button, etc.

Referring to fig. 5, the display screen 230 includes a first display screen 231 and a second display screen 232, the first display screen 231 and the second display screen 232 are covered on opposite sides of the bezel 210 and limit the main control board 220 in the bezel 210, the second display screen 232 is close to the heart rate assembly 120 and limited in the bottom frame 212, and the first display screen 231 is disposed on one surface of the bezel 210 facing away from the heart rate base 121. When the electronic dial 20 is covered on the heart rate base 121, the first display screen 231 can display heart rate information, and at this time, the second display screen 232 is stored and hidden in the limiting cavity 1213 of the heart rate base 121 and is in a state that information cannot be displayed; referring to fig. 1, when the electronic dial 20 is turned over and the heart rate base 121 is in an included angle state, the conductive terminal 123 is disconnected from the electronic dial 20, the electronic dial 20 cannot receive heart rate information, the first display screen 231 cannot display heart rate information, at this time, the second display screen 232 is exposed and has a display function, and the second display screen 232 has the camera 2321 so that the second display screen 232 can display a shooting picture. It should be understood that in other embodiments, the second display 232 may not be provided, so long as the display 230 is capable of displaying heart rate information.

Referring to fig. 5, in one embodiment, the heart rate assembly 120 is further provided with a magnetic attraction member 125, and the magnetic attraction member 125 is disposed opposite to the heart rate base 121 on a side away from the adaptor 1212. The magnetic piece 125 is used for controlling the second display screen 232 to be started and closed, when the electronic dial 20 rotates to be close to the heart rate base 121, the magnetic piece 125 can magnetically attract the electronic dial 20 to enable the electronic dial 20 to be covered on the heart rate base 121, meanwhile, the magnetic piece 125 can trigger a switch in the electronic dial 20 to close the second display screen 232 and open the first display screen 231, at the moment, the second display screen 232 can display shooting pictures, and the first display screen 231 can display heart rate information. It should be understood that, first, the magnetic attraction member 125 is only one way to control the starting and closing of the shooting function of the second display screen 232; second, the second display screen 232 may have other display functions in addition to the image capturing function, and the third, the installation position of the magnetic attraction member 125 is not limited, and may be other positions of the heart rate base 121. In other embodiments, the magnetic attraction member 125 may not be provided.

Referring to fig. 5, the magnet 125 includes a magnet 1251 and a cushion 1252, the heart rate base 121 is further provided with a corresponding receiving slot 1214, the magnet 1251 is received in the receiving slot 1214, and the cushion 1252 is covered on the magnet 1251 and is received in the receiving slot 1214 in a covering manner. The magnetic attraction member 125 is accommodated in the accommodation groove 1214, so that the heart rate assembly 120 is more compact in structure, and the buffer pad 1252 separates the magnet 1251 from direct contact with the electronic dial 20, thereby reducing abrasion between the magnet and the electronic dial 20. It should be appreciated that in other embodiments, the cushion 1252 may not be provided.

While the utility model has been described with reference to several exemplary embodiments, it is to be understood that the terminology used is intended to be in the nature of words of description and of limitation. As the present utility model may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.

Claims

1. A wristband, comprising:

the belt body is worn by a user;

2. The watchband of claim 1, wherein one end of the heart rate base is provided with an adapter, the adapter includes an adapter seat and an adapter shaft, the adapter seat is provided with a shaft hole capable of aligning with the connection hole of the electronic dial, and the adapter shaft is capable of penetrating through the shaft hole and the connection hole to mount the electronic dial on the heart rate base and rotate relative to the heart rate base.

3. The watchband of claim 2, wherein the heart rate base encloses to form a spacing cavity, the spacing cavity is used for accomodating the electronic dial plate, the conductive terminal expose in the diapire in spacing cavity, the heart rate collector is located the heart rate base is facing away from the one side in spacing cavity.

4. The wristband of claim 1, wherein the heart rate assembly further comprises a flexible circuit board, the heart rate base is provided with a receiving cavity, the flexible circuit board is positioned in the receiving cavity in a covering manner, and the flexible circuit board is electrically connected with the heart rate collector and the conductive terminals.

5. A heart rate monitoring wristwatch, comprising:

the wristband of any one of claims 1 to 4;

6. A heart rate monitoring wristwatch, comprising:

the belt body is worn by a user;

7. The heart rate monitor wristwatch of claim 6, wherein the electronic dial is tiltable about a side of the heart rate base relative to the heart rate base such that the electronic dial switches between an angled state with the heart rate base and a state covering the heart rate base.

8. The heart rate monitoring watch of claim 7, further comprising a main control board disposed within the electronic dial, the main control board being electrically connected to the conductive terminals when the electronic dial is covered by the heart rate base; when the electronic dial plate is connected with the heart rate base in an included angle state, the main control board is electrically disconnected with the conductive terminal.

9. The heart rate monitoring wristwatch of claim 6, wherein the electronic dial further comprises a first display screen and a second display screen arranged opposite to each other, the second display screen being arranged on a side of the electronic dial near the conductive terminal, the first display screen being arranged on a side of the electronic dial facing away from the second display screen; the first display screen can display heart rate information, and the second display screen can display shooting pictures.

10. The heart rate monitoring watch of claim 9, wherein the heart rate assembly further comprises a magnetic attraction piece arranged on the heart rate base, when the electronic dial plate rotates to a preset position in a direction close to the conductive terminal, the magnetic attraction piece can magnetically attract the electronic dial plate to enable the electronic dial plate to cover the heart rate base, and the magnetic attraction piece can trigger a switch of the electronic dial plate at the same time to close the second display screen and open the first display screen.