CN112890386B

CN112890386B - Watch with a display

Info

Publication number: CN112890386B
Application number: CN202110094217.3A
Authority: CN
Inventors: 张亮
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2021-01-22
Filing date: 2021-01-22
Publication date: 2022-11-01
Anticipated expiration: 2041-01-22
Also published as: CN112890386A; WO2022156725A1

Abstract

The application discloses a watch, which comprises a body, a watch body and a watch handle, wherein the body is provided with an accommodating cavity; the dial plate is rotatably arranged on the body; the watchband is at least partially arranged in the accommodating cavity and is connected with the body in a sliding manner; the dial plate is in transmission connection with the watchband through the transmission mechanism; under the condition that the dial plate rotates, the dial plate drives the watchband to retract into or extend out of the containing cavity through the transmission mechanism. And under the state that the dial plate rotates, the dial plate drives the gear shaft to rotate through the transmission mechanism so as to drive the watchband to retract into or extend out of the watchband accommodating cavity. The watch can adjust the length of the watchband by twisting the watch plate, and is convenient for consumers to use.

Description

Watch with a memory

Technical Field

The application relates to the technical field of electronic equipment, in particular to a watch.

Background

With the progress of 5G communication technology and the vigorous development of the consumer electronics industry, more and more manufacturers propose the strategy of IOT and strive to establish the product ecology of own brands. In this wave, traditional wrist-watch also begins to change toward intelligent wrist-watch, gets into in the product matrix of more and more brands, and the design of intelligent wrist-watch and the agreeing with of this theory of healthy life make the wish that the consumer bought intelligent wrist-watch stronger and stronger.

The watchband of most current intelligent wrist-watches divide into two watchbands of length more and constitutes, and the watchband adopts living ear and this body coupling, sets up the card protruding on a watchband, sets up a plurality of card holes on another watchband, and the protruding joint of card realizes adjusting the length of watchband on the card hole of difference. However, the card hole on the watchband is the interval setting, can not set up in succession to when making the watchband wear on the wrist, there is the loose problem in last hole, the tight problem in lower hole, and user experience is poor.

Disclosure of Invention

The embodiment of the disclosure provides a watch, which aims to solve the problem that the watchband cannot be adjusted to a proper length due to the fact that the clamping holes of the existing watchband are arranged at intervals.

In order to solve the above problems, the present disclosure adopts the following technical solutions:

the disclosed embodiment provides a watch, including:

a body having a receiving cavity;

the dial plate is rotatably arranged on the body;

the watchband is at least partially arranged in the accommodating cavity and is connected with the body in a sliding manner;

the dial plate is in transmission connection with the watchband through the transmission mechanism;

under the condition that the dial plate rotates, the dial plate drives the watchband to retract into or extend out of the containing cavity through the transmission mechanism.

The technical scheme adopted by the embodiment of the disclosure can achieve the following beneficial effects:

the utility model provides a wrist-watch is when dressing, through the twisting of one hand to the dial plate, and the watchband can be followed this internal watchband and held the roll-off extension in the chamber, and convenience of customers gets and plucks. After a user wears the watchband with one hand, the length of the watchband can be adjusted by screwing the dial plate in the opposite direction, so that the watchband is suitable for the size difference of wrists of consumers. For different consumers, the redundant watchbands are all retracted into the watchband accommodating cavities, and the watch appearance is attractive and consistent.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this disclosure, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure and not to limit the disclosure. In the drawings:

fig. 1 is a schematic perspective view of a watch according to an embodiment of the present application;

fig. 2 is an exploded view of a wristwatch according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of a middle frame of a watch according to an embodiment of the present application;

FIG. 4 is a first schematic cross-sectional view of a watch, according to an embodiment of the present application;

FIG. 5 is a second schematic cross-sectional view of a wristwatch provided in an embodiment of the present application;

FIG. 6 is a first partial, longitudinal cross-sectional view of a wristwatch provided in an embodiment of the present application;

FIG. 7 is a second partial longitudinal cross-sectional view of a wristwatch provided in an embodiment of the present application;

FIG. 8 is an enlarged view of portion A of FIG. 7;

FIG. 9 is a schematic view of an assembled structure of a middle frame and a back cover of a wristwatch according to an embodiment of the present application;

FIG. 10 is a bottom view of a wristwatch provided in an embodiment of the present application;

FIG. 11 is a view of the construction of FIG. 10 with the wristband and back cover portion removed.

In the figure:

1. a body; 11. a middle frame; 111. a first through groove; 112. a second through groove; 113. a bottom wall of the middle frame; 12. a rear cover; 121. a first annular wall; 121a, a first sidewall; 122. a second annular wall; 122a, a second side wall; 123. a guide post; 13. a band accommodating chamber; 131. a guide rail portion; 131a, a first segment; 131b, a second section; 131c, a transition section; 14. a display screen; 2. a dial plate; 3. a transmission mechanism; 31. a gear portion; 32. a transmission rod; 33. a drive wheel; 4. a gear shaft; 5. a watchband; 51. a slide bar; 52. meshing teeth; 6. pre-tightening the roller; 7. a worm bearing; 8. a plane bearing; 9. a watch interior space; 10. and (4) screws.

Detailed Description

To make the objects, technical solutions and advantages of the present disclosure more apparent, the following embodiments of the present disclosure will be clearly and completely described in conjunction with the accompanying drawings. It is to be understood that the described embodiments are merely a subset of the disclosed embodiments and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.

The terms first, second and the like in the description and in the claims of the present disclosure are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that embodiments of the disclosure can be practiced in sequences other than those illustrated or described herein. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.

Technical solutions disclosed in the embodiments of the present disclosure are described in detail below with reference to fig. 1 to 11.

Referring to fig. 1, 2 and 7, the present embodiment provides a wristwatch including a body 1, a dial 2, a transmission mechanism 3, and a band 5. The body 1 is provided with various functional modules of the watch, such as a battery, a display screen 14, a circuit board and the like, which are arranged on the body 1. The body 1 is internally provided with a watchband accommodating cavity 13, the dial 2 is rotatably arranged on the body 1, for example, the dial 2 is rotatably arranged on the body 1 through a plane bearing 8 (shown in fig. 6), the watchband 5 is at least partially arranged in the watchband accommodating cavity 13, and the watchband 5 is connected with the body 1 in a sliding way; the dial 2 is in transmission connection with the watchband 5 through the transmission mechanism 3; under the condition that the dial 2 rotates, the dial 2 drives the watchband 5 to retract into or extend out of the accommodating cavity 13 through the transmission mechanism 3. Under the state that the dial 2 rotates around the first direction, the dial 2 drives the gear shaft 4 to rotate through the transmission mechanism 3 so as to drive the watchband 5 to retract into the watchband accommodating cavity 13; under the state that the dial plate 2 rotates around the second direction, the dial plate 2 drives the gear shaft 4 to rotate through the transmission mechanism 3 so as to drive the watchband 5 to extend out of the watchband accommodating cavity 13. Wherein the first direction and the second direction are opposite directions. When wearing the wrist-watch, if want to take off the wrist-watch, only need rotate dial plate 2, can drive watchband 5 through drive mechanism 3 and stretch out and hold chamber 13, the user can take off the wrist-watch easily. If the user need wear the wrist-watch, embolia wrist department earlier the watchband and rotate dial plate 2, drive the watchband retraction through drive mechanism and hold chamber 13 for watchband 5 shortens in the length outside the wrist-watch, can realize wearing of wrist-watch, and according to different users' wearing habits, can adjust watchband 5 length outside the wrist-watch in order to obtain the most comfortable length of wearing simultaneously. The transmission mechanism 3 for connecting the dial 2 and the watch band 5 in a transmission manner is not limited to the content described in the present application, and structures such as a belt transmission structure can be realized, and the dial 2 can be rotated to enable the watch band 5 to extend out of or retract into the accommodating cavity 13.

Optionally, the transmission mechanism 3 includes a gear portion 31, a transmission rod 32, a driving wheel 33 and a gear shaft 4, the gear shaft 4 is rotatably disposed in the accommodating cavity, a meshing portion is disposed on the watch band 5, and the watch band 5 is meshed with the gear shaft 4 through the meshing portion; a gear ring part is arranged on the dial 2 along the circumferential direction, the gear part 31 is meshed with the gear ring part, the transmission rod 32 is connected with the gear part 31, and the driving wheel 33 is connected with the gear shaft 4; the transmission rod 32 is in transmission connection with the driving wheel 33. By rotating the dial 2, the gear ring portion can drive the gear portion 31 to rotate, and the gear portion 31 sequentially drives the transmission rod 32 and the driving wheel 33 to rotate. The gear shaft 4 is provided with a plurality of convex teeth on the circumferential side surface, the convex teeth are distributed along the circumferential direction of the gear shaft 4, and the convex teeth extend along the length direction of the gear shaft 4. The gear shaft 4 is connected to the drive wheel 33. The driving wheel 33 is in transmission connection with the transmission rod 32, and the transmission rod 32 can drive the driving wheel 33 to rotate. The band 5 is provided with an engaging portion 52, and the engaging portion 52 includes a plurality of teeth, each of which is distributed along the length direction of the band, and each of which is in the form of a bar and extends along the width direction of the band.

Optionally, the transmission rod 32 is a worm, the driving wheel 33 is a worm wheel, and the worm is meshed with the worm wheel. Referring to fig. 5, another cross-sectional view of the body 1 is shown, which is further downward than fig. 4, and shows the transmission layout of the worm, the worm wheel and the gear shaft 4. Worm, worm wheel and gear shaft 4 all distribute in body 1 symmetrically, and the worm installed on four angles of body 1 rotates and can drive rather than the complex worm wheel and rotate, and the worm wheel and worm have changed driven direction. The worm wheel is connected with the gear shaft 4 through a key, the worm wheel rotates to drive the gear shaft 4 to rotate, the layout key point in the figure 5 lies in the rotation directions of the worms at different positions and the matching directions of the worm wheel relative to the worm, under the rotation drive of the dial 2, the four gear parts 31 rotate in the same direction to drive the four worms to rotate in the same direction, and the analysis shows that when the rotation directions of the worms are kept unchanged, the rotation directions of the worm wheels at the mouth parts on two sides of the body 1 are opposite. In fig. 5, the gear shafts 4 on the left and right sides are driven by the worm wheel to rotate in opposite directions, so that when the dial 2 is rotated, the two ends of the watchband 5 are retracted into or withdrawn from the watchband accommodating cavity of the body 1 at the same time, thereby improving the watchband adjusting speed.

Optionally, the number of the transmission mechanisms 3 is 2, two transmission mechanisms 3 are respectively disposed at two ends of the gear shaft 4, two ends of the gear shaft 4 are respectively connected to one driving wheel 33, and the driving wheels 33 corresponding to two ends of the gear shaft 4 on the body are respectively provided with corresponding transmission mechanisms 3. I.e. the gear shaft 4 has two drive wheels 33, the two drive wheels 33 being located at both ends of the gear shaft 4. And the body is provided with two transmission mechanisms 3 corresponding to the two driving wheels 33, and transmission rods on the two transmission mechanisms 3 are in transmission connection with the two driving wheels 33 respectively, so that the driving force is provided for two sides of the gear shaft 4 at the same time, and the stability of the transmission structure is ensured.

Optionally, a first opening and a second opening communicating with the watchband accommodating cavity 13 are provided on the body 1, corresponding transmission mechanisms 3 are respectively provided on the body 1 corresponding to the first opening and the second opening, two ends of the watchband 5 respectively extend into the watchband accommodating cavity 13 from the first opening and the second opening, and two ends of the watchband 5 are respectively connected with the transmission mechanisms 3. In this embodiment, the body 1 is provided with a total of four transmission mechanisms 3 for two gear shafts 4. The watch band 5 can be an integrated watch band, as shown in fig. 4, which is a cross-sectional view of the body 1, and as can be seen from the figure, a gear ring portion is integrally formed on the watch face 2, four symmetrically distributed gear portions 31 are arranged on the periphery of the watch face 2, which are respectively the gear portions 31 on the four transmission mechanisms 3, and the four gear portions 31 can be driven to rotate by rotating the watch face 2. Specifically, the two ends of the watchband 5 are respectively connected with the gear shaft 4 through the first opening and the second opening in a transmission manner, and the gear shaft 4 can be rotated by rotating the dial 2, so that the watchband 5 is driven to retract into or extend out of the accommodating cavity 13.

Alternatively, as shown in fig. 2, the guide posts 123 are provided on both sides of the first opening and the second opening, and the guide posts 123 play a role of guiding the movement of the band 5 to prevent the band 5 from shifting during the retraction or extension of the band 5 into or out of the band-receiving chamber 13.

Alternatively, referring to fig. 6, a worm bearing 7 is provided on the body 1, and the worm is connected to the worm bearing 7.

Specifically, the body 1 includes a back cover 12 and a middle frame 11, the back cover 12 and the middle frame 11 are buckled with each other, and a watchband accommodating cavity 13 is formed between the back cover 12 and the middle frame 11. The rear cover 12 is provided with a worm bearing 7, and the middle frame 11 can also be provided with the worm bearing 7. The two ends of the worm are respectively connected with the worm bearings 7 on the back cover 12 and the middle frame 11. Two outer convex parts are arranged on two sides of the first opening on the middle frame 11, two outer convex parts are also arranged on two sides of the second opening, four outer convex parts are arranged on the middle frame 11, and cavities are respectively arranged in the outer convex parts and used for accommodating the transmission mechanism 3.

Referring to figure 6, there is shown a partial longitudinal cross-sectional view of the body 1. Dial plate 2 is installed on center 11, support through annular flat face bearing 8, dial plate 2 can be free rotation under flat face bearing 8's effect, annular gear structure is processed to its the latter half, the gear portion 31 meshing of annular gear structure and drive mechanism 3, under the condition that the user twisted dial plate 2, the annular gear structure on the dial plate 2 drives each gear portion 31 and rotates, the worm relies on two worm bearing 7 location from top to bottom. Wherein, the gear part 31 and the worm can be driven by key matching, the rotation of the worm drives the worm wheel to rotate, and the worm wheel and the gear shaft 4 are matched by key, thereby driving the gear shaft 4 to rotate.

In the design of the transmission ratio of the mechanism, the annular gear structure on the dial 2 has a large reduction ratio relative to the gear part 31 on the transmission mechanism 3, and the dial 2 is screwed by a hand for a little angle, so that the gear part 31 can drive the worm to rotate for a plurality of turns; the transmission of worm wheel and worm also is big reduction ratio, and the worm rotates many rings, and the worm wheel could rotate the round, and the combination of two processes can match dial plate 2 turned angle and 4 turned angle's of gear shaft proportion for the staff is twisted and is moved dial plate 2 and can have the flexible speed of 5 comfortable watchbands, and this can increase 5 flexible efficiencies of watchband, improves consumer's experience quality.

In the transmission process of screwing the dial 2 to the extension of the watchband 5 by a human hand, the transmission link from the worm to the worm wheel is unidirectional, the worm can rotate only by rotating the worm wheel, and when the worm does not move, the worm wheel rotates and is locked. The advantage of this design just can only change watchband 5 length through the staff is twisted dial 2, and when the wrist-watch was worn, through the motion of wrist and the pulling of outside to watchband 5, these can not let the wrist-watch wear loose and carry on arms, have strengthened the security and the comfortable degree of wearing.

Alternatively, referring to fig. 2, 7 and 8, a guide rail portion 131 is provided on an inner wall of the band housing chamber 13; a part of the band 5 can be slidably engaged with the guide rail 131; when the dial 2 is rotated, the band 5 is retracted into or extended from the housing chamber 13 along the rail portion 131. Specifically, the band 5 is provided with a slide bar 51, and the slide bar 51 is slidably engaged with the rail portion 131. The guide rail part 131 and the slide bar 51 are matched to be capable of guiding the sliding direction of the watchband 5, so that the situation that the position of the watchband 5 in the accommodating cavity 13 is changed after being adjusted for many times, and the watchband 5 cannot be smoothly retracted into or extended out of the accommodating cavity 13 is avoided. The smoothness and the accuracy of the length adjustment of the watchband 5 extending out of the accommodating cavity 13 are improved, and the use experience of a user is improved.

Referring to fig. 8, both sides of the slide bar 51 at the front end of the band 5 are engaged with the guide portions 131 at both sides of the band accommodating chamber 13, the guide portions 131 define a sliding direction in which the band 5 extends and retracts, the band accommodating chamber includes a bottom wall and a side wall, the guide portions 131 are disposed on the side wall, the guide portions 131 include a first section 131a extending along an upper surface of the bottom wall and a second section 131b higher than the surface of the bottom wall, and an upwardly convex transition section 131c is disposed between the first section 131a and the second section 131 b. At this transition 131c when the band 5 is retracted into the band-receiving chamber 13, the slide bar 51 of the band 5 rises and slides along the guide rail portion 131, and the lower surface of the band 5 starts to separate from the bottom wall, thereby reducing the frictional resistance during the extension and retraction of the band 5, and the guide rail portion 131 is fixed to the side wall, and the extending track thereof is a smooth curve, which can increase the extension and retraction amount of the band 5, and the extension and retraction amount of the band 5 can reach 10cm by the optimum design, so that the same type of band 5 can basically meet the wearing size requirements of most consumers.

Optionally, the guide rail portion 131 includes a first guide rail portion extending to the first opening portion and a second guide rail portion extending to the second opening portion, and the first guide rail portion and the second guide rail portion are vertically spaced in the thickness direction of the body 1; under the condition that the dial 2 rotates, two ends of the watchband 5 respectively retract into or extend out of the accommodating cavity 13 along the first guide rail part and the second guide rail part. The both ends of watchband 5 via first oral area and second oral area stretch into hold the chamber 13 in and be connected with the transmission of gear shaft 4, through the guide of first guide rail portion and second guide rail portion, at the in-process of rotating dial plate 2, the both ends of watchband 5 are retracted simultaneously or are stretched out and hold chamber 13, have improved the efficiency of adjusting watchband 5 length.

Optionally, referring to fig. 2 and 7, a pre-tightening roller 6 is further disposed in the watchband accommodating cavity 13, the pre-tightening roller 6 is parallel to the gear shaft 4, the watchband 5 includes a first surface having an engaging portion 52 and a smooth second surface, the watchband 5 passes through a gap between the pre-tightening roller 6 and the gear shaft 4, the first surface contacts the gear shaft 4, and the engaging portion on the first surface engages with the gear shaft 4. The second surface is in contact with the pre-tensioning roller 6. Wherein meshing portion 52 includes a plurality of dogteeth that set up along first surface width direction, and gear shaft 4 includes rectangular axis body, sets up a plurality of dogteeth along circumference on the rectangular axis body, and each dogtooth sets up along the length direction of rectangular axis body to watchband and gear shaft 4 mesh have been realized. As shown in fig. 7, the gear shaft 4 is engaged with the engagement portion 52 on the watch band 5, and the reverse movement of the gear shaft 4 on both sides of the watch band 5 can drive both sides of the watch band 5 to retract into or extend out of the watch band accommodating cavity 13 at the same time, thereby realizing the overall extension and retraction of the watch. The pre-tightening rollers 6 at the mouth parts at two sides of the body 1 can rotate mutually in the movement process of the watchband 5, so that the watchband 5 can be guided to slide towards one side of the gear shaft 4, and the phenomenon that the watchband 5 is jammed in the stretching process can be avoided.

Alternatively, referring to fig. 7, the body 1 includes a back cover 12 and a middle frame 11, the middle frame 11 includes a middle frame bottom wall 113, the middle frame 11 is covered on the back cover 12, and the watchband accommodating chamber 13 is formed between the middle frame bottom wall 113 and the back cover 12.

Specifically, referring to fig. 2, the rear cover 12 includes a first annular wall 121 and a second annular wall 122 spaced apart from each other. The first annular wall 121 and the second annular wall 122 are respectively provided with a first side wall 121a and a second side wall 122a, which are straight, and the first side wall 121a and the second side wall 122a are provided with the guide rail portions 131.

The middle frame bottom wall 113 is provided with a first through groove 111 and a second through groove 112, the middle frame 11 is covered on the rear cover 12, and the middle frame bottom wall 113, the first side wall 121a and the second side wall 122a enclose to form the watchband accommodating cavity 13 or form a part of the watchband accommodating cavity 13; the first through groove 111 communicates with the inner cavity of the first annular wall 121, and the second through groove 112 communicates with the inner cavity of the second annular wall 122.

Referring to fig. 9, which is a schematic view of the assembled middle frame 11 and back cover 12, this solution can separate the inner space of the body into two separate spaces, namely, the inner space 9 of the wristwatch and the watchband accommodating chamber 13. The watch inner space 9 is composed of the space on both sides of the middle frame 11 and the back cover 12, and comprises the inner cavity of the middle frame 11 and the space in two annular walls communicated with the inner cavity of the middle frame 11. The watch inner space 9 is sealed with the outside by dispensing, rubber rings, foam and other modes, and serves as the stacking and mounting position of the watch inner components, and the watch band accommodating cavity 13 is independently arranged.

Fig. 10 shows a view of the bottom wall of the watch, and fig. 11 shows a view of the bottom of the watch with the back cover 12 and the strap 5 removed. It can be known from the figure that back lid 12 and center 11 are installed fixedly through eight symmetrical screws 10, the whole firm of guaranteeing the installation, two screws 10 that distribute respectively on four lateral angles of body, its fastening position distributes in the both sides of worm, the worm is undertaking and is moving the flexible transmission process of watchband 5 from dial plate 2 to twisting, its rotational motion's stability needs to be guaranteed, through set up two screws 10 respectively in the both sides of each worm wheel, the motion stability of worm has been guaranteed, product quality is improved, and life has been prolonged.

While the present disclosure has been described with reference to the embodiments illustrated in the drawings, which are intended to be illustrative rather than restrictive, it will be apparent to those of ordinary skill in the art in light of the present disclosure that many more modifications may be made without departing from the spirit of the disclosure and the scope of the appended claims.

Claims

1. A watch, comprising:

a body having a receiving cavity;

the dial plate is rotatably arranged on the body;

under the condition that the dial plate rotates, the dial plate drives the watchband to retract into or extend out of the accommodating cavity through the transmission mechanism;

the transmission mechanism comprises a gear part, a transmission rod, a driving wheel and a gear shaft, the gear shaft is rotatably arranged in the accommodating cavity, a meshing part is arranged on the watchband, and the watchband is meshed with the gear shaft through the meshing part;

a gear ring part is arranged on the dial plate along the circumferential direction, the gear part is meshed with the gear ring part, the transmission rod is connected with the gear part, and the driving wheel is connected with the gear shaft;

the transmission rod is in transmission connection with the driving wheel.

2. The watch of claim 1, wherein the drive link is a worm and the drive wheel is a worm gear, the worm and the worm gear being in mesh.

3. The watch according to claim 1, wherein the number of said transmission mechanisms is 2, two of said transmission mechanisms are respectively provided at both ends of said gear shaft, and said driving wheel is respectively connected to both ends of said gear shaft;

the driving wheels corresponding to the two ends of the gear shaft are respectively provided with one transmission mechanism.

4. The wristwatch of claim 1 wherein the body is provided with a first mouth and a second mouth communicating with the band-receiving chamber;

the body is provided with corresponding transmission mechanisms corresponding to the first opening part and the second opening part respectively;

the two ends of the watchband extend into the watchband accommodating cavity from the first opening part and the second opening part respectively, and the two ends of the watchband are in transmission connection with the transmission mechanism respectively.

5. The wristwatch of claim 4, wherein a guide rail portion is provided on an inner wall of the band housing chamber;

part of the watchband can be in sliding fit with the guide rail part;

under the condition that the dial plate rotates, the watch band retracts into or extends out of the accommodating cavity along the guide rail part.

6. The watch of claim 5, wherein the receiving cavity comprises a bottom wall and a side wall;

the guide rail part is arranged on the side wall;

the guide rail part comprises a first section extending along the upper surface of the bottom wall and a second section higher than the upper surface of the bottom wall;

an upwards convex guide section is arranged between the first section and the second section.

7. The watch according to claim 5, wherein said rail portion includes a first rail portion extending toward said first mouth portion and a second rail portion extending toward said second mouth portion;

the first guide rail part and the second guide rail part are arranged at intervals up and down along the thickness direction of the body;

under the condition that the dial plate rotates, two ends of the watchband respectively retract into or extend out of the accommodating cavity along the first guide rail part and the second guide rail part.

8. The watch according to claim 1, wherein a pretensioning roller is further provided in said band-receiving chamber;

the pre-tightening rolling shaft is parallel to the gear shaft;

the watch band comprises a first surface with an engaging part and a smooth second surface;

the watchband passes through a gap between the pre-tightening roller and the gear shaft, the first surface is in contact with the gear shaft, and the second surface is in contact with the pre-tightening roller.

9. The watch of claim 1, wherein the body comprises a back cover and a middle frame;

the center includes the center diapire, the center lid is established and is covered after, the center diapire with form between the lid after the watchband holds the chamber.

10. The watch of claim 9, wherein the back cover includes first and second spaced apart annular walls; the first annular wall and the second annular wall are respectively provided with a straight first side wall and a straight second side wall;

a first through groove and a second through groove are formed in the bottom wall of the middle frame;

the middle frame is covered on the rear cover, and the bottom wall, the first side wall and the second side wall of the middle frame surround to form the watchband accommodating cavity or form a part of the watchband accommodating cavity; the first through groove is communicated with the inner cavity of the first annular wall, and the second through groove is communicated with the inner cavity of the second annular wall.