Length-adjustable head grain structure, watchband and watch

Abstract

The application discloses a length-adjustable head grain structure, a watchband and a watch, and relates to the technical field of watches. The structure comprises a first head grain, one end of which is provided with a slot, and a limiting part is arranged in the slot; a second head grain is arranged in the slot and can move along the length direction of the first head grain, and the second head grain is provided with a limiting piece; a button is elastically arranged on the first head grain and can move along the height direction of the first head grain; when the second head grain is driven to move to a first position away from the first head grain, the limiting piece is connected with the limiting part in a matched mode, and the first head grain and the second head grain are kept relatively fixed; when the button is pressed, the button drives the limiting piece to be separated from the limiting part, and the second head grain can move to a second position close to the first head grain. In the application, the length of the watchband can be adjusted in a small range, so that a better wearing experience and a comfortable wearing effect can be obtained.

Description

Technical Field

[0001] This invention relates to the field of wearable device technology, and further to an adjustable headband structure, a watch strap, and a watch. Background Technology

[0002] With the rapid development of technology, various smart wearable devices are permeating all aspects of people's lives, bringing tremendous changes to their daily experiences. Wearable devices are not merely hardware devices; they achieve their powerful functions through software support, data interaction, and cloud interaction. Their applications are very broad, including healthcare, fitness, and communication. For example, watches are no longer limited to simply telling time. By embedding intelligent hardware and running a smartphone operating system connected to the network, they can perform various functions such as making calls, sending text messages, emails, viewing photos, and listening to music and videos. Smartwatches are an extension and expansion of smartphone functions, bringing great convenience to people's daily lives.

[0003] When wearing a smartwatch, the case should fit snugly against the wrist for a secure fit and improved wearing experience. However, traditional watch straps are generally divided into buckle straps and separate chain straps. Buckle straps require disassembly and reassembly for each length adjustment, which is cumbersome and results in a poor user experience. Separate chain straps, on the other hand, have fixed-length individual links, requiring users to purchase additional parts or remove excess links for adjustment. This process is complex and may not always achieve the desired length, impacting the performance of the smartwatch.

[0004] Therefore, the inventors hope to solve the technical problem of how to further adjust the length of the watch strap within a small range without affecting the original adjustment method, so as to obtain a watch strap with a better wearing experience and a comfortable wearing effect. Summary of the Invention

[0005] To address the aforementioned technical problems, the present invention aims to provide an adjustable end-link structure, a watch strap, and a watch, which enables the watch strap length to be adjusted within a small range to achieve a better wearing experience and a comfortable wearing effect.

[0006] To achieve the above objectives, the present invention provides a length-adjustable headstock structure, comprising:

[0007] The first head piece has a slot at one end, and a limiting part is provided in the slot;

[0008] The second head piece is disposed in the slot and can move along the length direction of the first head piece. The second head piece is provided with a limiting member.

[0009] The button is spring-loaded and can move along the height of the first head piece;

[0010] When the second headpiece is driven to move away from the first headpiece to the first position, the limiting member is adapted to the limiting part, and the first headpiece and the second headpiece remain relatively fixed.

[0011] Pressing the button causes the limiting member to separate from the limiting part, allowing the second head piece to move to a second position closer to the first head piece.

[0012] In some embodiments, a button slot is provided in the slot, the button slot extends through the bottom of the slot, a portion of the button structure extends through the button slot into the slot, and the limiting portion is formed at the side wall of the button slot.

[0013] In some embodiments, the first headpiece is provided with a decorative plate located on the back side of the slot. The decorative plate is fixedly or detachably connected to the first headpiece. The decorative plate is made of a soft, elastic material. The button is fixed to the decorative plate, so that the button is spring-loaded onto the first headpiece.

[0014] In some embodiments, the first head piece is provided with a decorative groove, the decorative groove is located on the back side of the slot, a decorative plate is provided in the decorative groove, and the decorative plate is provided with a pressing groove;

[0015] The button includes a pressing section, a connecting section, a driving section, and a first elastic element. The connecting section is disposed within the decorative groove, and the decorative plate is pressed onto the connecting section. The pressing section is fixedly connected to the connecting section and extends through the pressing groove by a predetermined length. The driving section is fixedly connected to the end of the connecting section away from the pressing section and extends through the button groove by a predetermined length. The first elastic element is disposed between the connecting section and the bottom of the decorative groove to provide a driving force for the button to move away from the first tip.

[0016] In some embodiments, the bottom of the decorative groove is provided with a fixing hole, the connecting section is provided with a through hole, the decorative panel is provided with a fixing member, and the fixing member passes through the through hole and is adapted to connect with the fixing hole to install the button on the first head piece;

[0017] The first elastic element is elastic foam cotton. One side of the elastic foam cotton is bonded and fixed to the connecting section, and the other side is bonded and fixed to the bottom of the decorative groove.

[0018] In some embodiments, mounting grooves are provided on both sides of the slot, a second elastic member is provided in the mounting groove, and limit blocks are provided on both sides of the second head piece. The limit blocks can reciprocate along the length direction of the mounting groove. One end of the second elastic member is connected to the end of the mounting groove, and the other end is connected to the limit block, which is used to provide a driving force for the second head piece to move closer to the first head piece.

[0019] A decorative side panel is provided on the side of the mounting groove away from the slot, and the decorative side panel can be detachably installed in the mounting groove.

[0020] In some embodiments, a limiting groove is provided on the side of the second head piece close to the first head piece. The limiting member includes a fixing part, a connecting part, and an elastic protrusion. The fixing part is connected to the bottom of the limiting groove and has a hollow groove. One end of the connecting part is fixedly connected to the side wall of the hollow groove and the other end is connected to the elastic protrusion. The connecting part is inclined so that the elastic protrusion is located on the side of the hollow groove away from the bottom of the limiting groove.

[0021] When the button is pressed, the elastic protrusion can move towards the bottom of the hollow groove, so that the elastic protrusion disengages from the limiting part.

[0022] In some embodiments, a limiting groove is provided on the side of the second head piece close to the first head piece. The limiting member includes a fixing part, a connecting part, and an elastic protrusion. The fixing part is a plate-shaped structure and is connected to the bottom of the limiting groove. One end of the connecting part is integrally bent with the fixing part, and the other end is connected to the elastic protrusion, so that the elastic protrusion is located on the side of the connecting part away from the bottom of the limiting groove.

[0023] When the button is pressed, the elastic protrusion can move towards the bottom of the limiting groove, so that the elastic protrusion disengages from the limiting part.

[0024] In some embodiments, the first head link is provided with a first connecting part, which is located at the end of the first head link away from the slot, and the first connecting part is used to connect with the watch body, watch strap or watch link.

[0025] The second endpiece is provided with a second connecting part, which is located at the end of the second endpiece away from the first endpiece, and is used to connect with the watch body, watch strap or watch beads.

[0026] According to another aspect of the present invention, the present invention further provides a watch strap, including the length-adjustable headband structure described in any one of the foregoing claims, and further comprising:

[0027] Multiple surface particles are connected in sequence, and the second head particle is connected to the first surface particle;

[0028] Alternatively, a soft adhesive tape, wherein the second end piece is connected to the end of the soft adhesive tape.

[0029] According to another aspect of the present invention, the present invention further provides a watch, including the watch strap described above, and a watch body, the watch body being connected to the first head link.

[0030] Compared with the prior art, the adjustable head link structure, watch strap, and watch provided by the present invention have the following beneficial effects:

[0031] The adjustable end link structure provided by this invention is novel and ingenious. It can further realize automatic adjustment of the watch strap length within a small range without affecting the original adjustment method, thus achieving a better wearing experience and a more comfortable wearing effect. It also has the advantages of easy disassembly and assembly, convenient adjustment, and compatibility with traditional chain straps and soft rubber straps. Attached Figure Description

[0032] The preferred embodiments will now be described in a clear and easy-to-understand manner, in conjunction with the accompanying drawings, to further explain the above-mentioned characteristics, technical features, advantages, and implementation methods of the present invention.

[0033] Figure 1 This is a schematic diagram of the preferred embodiment of the present invention, showing the contracted state of the length-adjustable head-granule structure;

[0034] Figure 2 This is a cross-sectional view of the shrinkage state of the length-adjustable head particle structure in a preferred embodiment of the present invention;

[0035] Figure 3 This is a schematic diagram of the extended state of the head particle structure in a preferred embodiment of the present invention;

[0036] Figure 4 This is a cross-sectional view of the extended state of the length-adjustable head particle structure according to a preferred embodiment of the present invention;

[0037] Figure 5 This is an exploded structural diagram of the adjustable head particle structure according to a preferred embodiment of the present invention;

[0038] Figure 6 This is a schematic diagram of the exploded structure of the second head particle according to a preferred embodiment of the present invention;

[0039] Figure 7 This is a schematic diagram of the structure of the second headpiece in another preferred embodiment of the present invention;

[0040] Figure 8This is a schematic diagram of the exploded structure of the second head particle according to another preferred embodiment of the present invention;

[0041] Figure 9 This is a schematic diagram of the contracted state of the head-granule structure, which is an adjustable length according to another preferred embodiment of the present invention;

[0042] Figure 10 This is a cross-sectional view of the contracted state of the head-granule structure in another preferred embodiment of the present invention;

[0043] Figure 11 This is a schematic diagram of the extended state of the head particle structure in another preferred embodiment of the present invention;

[0044] Figure 12 This is a cross-sectional view of the extended state of the head particle structure in another preferred embodiment of the present invention;

[0045] Figure 13 This is an exploded structural diagram of the first tip and the button in another preferred embodiment of the present invention;

[0046] Figure 14 This is a schematic diagram of the structure of the first headpiece in another preferred embodiment of the present invention.

[0047] Explanation of icon numbers:

[0048] First end piece 1, slot 11, limiting part 111, button slot 12, decorative plate 13, pressing groove 131, fixing part 132, decorative groove 14, fixing hole 141, mounting groove 15, second elastic element 151, decorative side plate 152, first connecting part 16, second end piece 2, limiting part 21, fixing part 211, hollow groove 2111, screw 2112, connecting part 212, elastic protrusion 213, limiting groove 22, limiting boss 221, screw hole 222, limiting block 23, limiting post 231, second connecting part 24, spring ear 241, button 3, pressing section 31, connecting section 32, through hole 321, driving section 33, first elastic element 34. Detailed Implementation

[0049] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0050] To keep the drawings concise, each figure only schematically shows the parts relevant to the invention, and these do not represent the actual structure of the product. Furthermore, to facilitate understanding, in some figures, only one of components with the same structure or function is schematically depicted, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one."

[0051] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0052] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0053] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0054] In one embodiment, refer to the appendix to the specification. Figures 1 to 4 The present invention provides an adjustable length head structure, comprising: a first head 1, a second head 2, and a button 3. One end of the first head 1 forms a slot 11, and a limiting part 111 is provided in the slot 11. The second head 2 is disposed in the slot 11 and can move along the length direction of the first head 1. The second head 2 is provided with a limiting member 21. The button 3 is spring-loaded on the first head 1 and can move along the height direction of the first head 1. When the second head 2 is driven to move away from the first head 1 to a first position, the limiting member 21 is adapted to and connected with the limiting part 111, and the first head 1 and the second head 2 remain relatively fixed. When the button 3 is pressed, the button 3 drives the limiting member 21 to separate from the limiting part 111, and the second head 2 can move towards the first head 1 to a second position.

[0055] In this embodiment, the second end piece 2 is slidably disposed in the slot 11 of the first end piece 1. When the second end piece 2 moves away from the first end piece 1 to the farthest distance, that is, when the second end piece 2 is at its maximum elongation position, the limiting member 21 on the second end piece 2 and the limiting part 111 on the first end piece 1 are locked. The first end piece 1 and the second end piece 2 remain relatively fixed. This state makes it convenient for the user to wear or remove the watch. Pressing the button 3 causes the limiting member 21 and the limiting part 21 to be unlocked. The second end piece 2 moves towards the first end piece 1 until it reaches the closest distance. At this time, the second end piece 2 and the first end piece 1 are in a free sliding state, and the length of the watch strap can be freely adjusted according to the thickness of the user's arm.

[0056] The novel and ingenious structure of this adjustable end link allows for automatic adjustment of the strap length within a small range without affecting the original strap adjustment method. This results in a better wearing experience and a more comfortable wearing effect. It also has the advantages of easy disassembly and assembly, convenient adjustment, and compatibility with traditional chain straps and soft rubber straps.

[0057] In one embodiment, refer to the appendix to the specification. Figures 1 to 6 A button groove 12 is provided inside the slot 11, extending through the bottom of the slot 11. Part of the button 3 extends into the slot 11 through the button groove 12. A limiting part 111 is formed on the side wall of the button groove 12. The side of the slot 11 away from the button groove 12 is designed as an open structure to facilitate processing and the loading and unloading of various components. The shape of the slot 11 matches the shape of the second head piece 2, such as a square structure or a convex structure.

[0058] The first end piece 1 is provided with a decorative plate 13, which is located on the back side of the slot 11. The decorative plate 13 and the first end piece 1 are connected by snap-fit ​​or glue. The decorative plate 13 is made of soft and elastic material. The button 3 is fixed on the decorative plate 13. The button 3 can also be integrally formed with the decorative plate 13, so that the button 3 can be spring-loaded onto the first end piece 1.

[0059] In this embodiment, a decorative plate 13 made of soft rubber is provided on the first lead 1, and then the button 3 is fixed on the decorative plate 13. The decorative plate 13 not only makes the lead more beautiful, but also serves as an elastic element. The decorative plate 13 made of soft rubber can realize the automatic rebound of the button 3, which simplifies the number of parts and makes it easier to miniaturize the lead structure. The button 3 can also be integrally formed with the decorative plate 13, which improves the structural stability and reduces costs.

[0060] In one embodiment, refer to the appendix to the specification. Figures 9 to 14The first prong 1 is provided with a decorative groove 14, which is located on the back side of the slot 11. A decorative plate 13 is provided inside the decorative groove 14, and a pressing groove 131 is provided in the middle of the decorative plate 13. The button 3 includes a pressing section 31, a connecting section 32, a driving section 33, and a first elastic member 34. The connecting section 32 is disposed in the decorative groove 14, and the decorative plate 13 is pressed onto the connecting section 32. The pressing section 31 is fixedly connected to the connecting section 32 and extends through the pressing groove 131 by a predetermined length, that is, the pressing section 31 extends to the outside of the first prong 1 to facilitate pressing operation. The driving section 33 is fixedly connected to the end of the connecting section 32 away from the pressing section 31 and extends through the button slot 12 by a predetermined length to hold the limiting member 21. The first elastic member 34 is disposed between the connecting section 32 and the bottom of the decorative groove 14 to provide a driving force for the button 3 to move away from the first prong.

[0061] Specifically, the decorative groove 14 has two fixing holes 141 at its bottom, and the connecting section 212 has through holes 321 on both sides. The decorative panel 13 has two fasteners 132, which pass through the through holes 321 and are fitted to the fixing holes 141 to mount the button 3 onto the first head piece 1. The fasteners 132 can be screws, in which case the fixing holes 141 are screw holes, and the button 3 is mounted onto the first head piece 1 by fitting the screws into the screw holes. The first elastic element 34 is elastic foam, with one side of the elastic foam bonded to the connecting section 32 and the other side bonded to the bottom of the decorative groove 14. This structure not only has fewer parts but is also simple and easy to assemble; it can also be adjusted after wearing by pulling the second head piece 2 and pressing the button 3 to retract it, making it convenient to operate and more interactive.

[0062] It should be noted that the specific structure of button 3 is described with reference to the accompanying drawings in the specification. In actual use, button 3 can also be set to other structures according to actual needs, as long as the above functions can be achieved. This is only for better illustrating the present invention and should not be construed as a limitation of the present invention.

[0063] In one embodiment, refer to the appendix to the specification. Figure 5 , Figure 6The slot 11 has mounting grooves 15 on both sides, and a second elastic element 151 is installed in each mounting groove 15. Limiting blocks 23 are installed on both sides of the second headpiece 2, and the limiting blocks 23 can reciprocate along the length of the mounting groove 15. One end of the second elastic element 151 is connected to the end of the mounting groove 15, and the other end is connected to the limiting block 23, providing a driving force for the second headpiece 2 to move closer to the first headpiece 1. The second elastic element 151 can be a spring, an elastic post, etc. By setting a double-spring structure, the extension and retraction of the second headpiece 2 is smoother and more stable. A limiting post 231 is installed on the limiting block 23, and a spring is adapted to be installed on the limiting post 231. The limiting block 23 not only serves as a connector for the second elastic element 151 but also as a guide for the second headpiece 2, further improving the smoothness of the movement of the second headpiece 2. A decorative side plate 152 is provided on the side of the mounting groove 15 away from the slot 11, and the decorative side plate 152 can be detachably installed in the mounting groove 15. The decorative side panel 152 makes the headstock structure more aesthetically pleasing and also improves the ease of installation of the second elastic element 151.

[0064] Further, refer to the attached instruction manual. Figure 5 , Figure 6 The second end piece 2 has a limiting groove 22 on the side near the first end piece 1. The limiting member 21 includes a fixing part 211, a connecting part 212, and an elastic protrusion 213. The fixing part 211 is connected to the bottom of the limiting groove 22 and has a hollow groove 2111. One end of the connecting part 212 is fixedly connected to the side wall of the hollow groove 2111, and the other end is connected to the elastic protrusion 213. The connecting part 212 is inclined so that the elastic protrusion 213 is located on the side of the hollow groove 2111 away from the bottom of the limiting groove 22. When the button 3 is pressed, the elastic protrusion 213 can move towards the bottom of the hollow groove 2111, so that the elastic protrusion 213 disengages from the limiting part 111. The bottom of the limiting groove 22 is provided with a square-shaped boss, and the fixing part 211 is provided with a square-shaped groove that matches the square-shaped boss. This structure facilitates the installation of the limiting member 21 and improves the connection stability between the limiting member 21 and the second head piece 2. The limiting member 21 can be made from a piece of steel plate. First, cut a first vertical cut, a horizontal cut, and a second vertical cut in sequence in the middle of the steel plate. Then, bend the middle part upward to form the connecting part 212 and the elastic protrusion 213.

[0065] In one embodiment, refer to the appendix to the specification. Figure 7 , Figure 8The second end piece 2 is provided with a limiting groove 22 on the side near the first end piece 1. The limiting member 21 includes a fixing part 211, a connecting part 212 and an elastic protrusion 213. The fixing part 211 is a plate-shaped structure and is connected to the bottom of the limiting groove 22. One end of the connecting part 212 is integrally bent with the fixing part 211, and the other end is connected to the elastic protrusion 213, so that the elastic protrusion 213 is located on the side of the connecting part 212 away from the bottom of the limiting groove 22. When the button 3 is pressed, the elastic protrusion 213 can move towards the bottom of the limiting groove 22, so that the elastic protrusion 213 disengages from the limiting part 111.

[0066] The bottom of the limiting groove 22 is provided with a columnar boss, and the fixing part 211 is provided with a groove that matches the columnar boss. This structure facilitates the installation of the limiting member 21 and improves the connection stability between the limiting member 21 and the second head piece 2. The limiting member 21 can be made from a piece of steel plate. First, one end of the steel plate is cut into a long strip structure. Then, the long strip structure is folded upward and bent to form the connecting part 212 and the elastic protrusion 213.

[0067] It should be noted that the specific structure of the limiting member 21 is described with reference to the accompanying drawings. In actual use, the limiting member 21 can also be set to other structures according to actual needs, as long as the above functions can be achieved. This is only for better illustrating the present invention and should not constitute a limitation on the present invention.

[0068] Furthermore, the first end link 1 is provided with a first connecting portion 16, which is located at the end of the first end link 1 away from the slot 11. The first connecting portion 16 is used to connect with the watch body, watch strap, or watch links. The second end link 2 is provided with a second connecting portion 24, which is located at the end of the second end link 2 away from the first end link 1. The second connecting portion 24 is used to connect with the watch body, watch strap, or watch links via spring bars 241.

[0069] According to another aspect of the present invention, the present invention further provides a watch strap, including the length-adjustable headband structure described in any one of the foregoing claims, and further comprising:

[0070] Multiple watch links are connected in sequence, with the second watch link 2 connected to the first watch link to form a chain-like watch strap. It can be used in wearable devices such as mechanical watches, electronic watches, smart watches, and smart bracelets.

[0071] Alternatively, a soft rubber strip, wherein the second end piece is connected to the end of the soft rubber strip to form a soft rubber watch strap, which can be applied to wearable devices such as mechanical watches, electronic watches, smart watches, and smart bracelets.

[0072] In the field of watch straps, the connection between the end links and the soft rubber strap is a common technique used in the field, which is to fix them by means of spring bars or the like. The installation through holes are shown in the figure. They can also be set according to common knowledge in the field, so they will not be described in detail here.

[0073] According to another aspect of the present invention, the present invention further provides a watch, including the watch strap described above, and also including a watch body, the watch body being connected to the first end link 1.

[0074] In this invention, the product is easy to assemble and can be adjusted after wearing. Simply pull the second end piece 2 and press the button 3 to retract it. The operation is convenient and the interactivity is better. The brand-new strap adjustment mechanism optimizes the adjustment operation feel and improves convenience.

[0075] In the watch industry, the use of interlocking links and spring bars to fix the watch body is a common technique. The installation through-hole is shown in the figure, but it can also be set according to common knowledge in the field, so it will not be described in detail here.

[0076] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0077] It should be noted that the above embodiments can be freely combined as needed. The above are merely preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A headstock structure with adjustable length, characterized in that, include: The first head piece has a slot at one end, and a limiting part is provided in the slot; The second head piece is disposed in the slot and can move along the length direction of the first head piece. The second head piece is provided with a limiting member. The button is spring-loaded and can move along the height of the first head piece; When the second headpiece is driven to move away from the first headpiece to the first position, the limiting member is adapted to the limiting part, and the first headpiece and the second headpiece remain relatively fixed. Pressing the button causes the limiting member to separate from the limiting part, allowing the second head piece to move to a second position closer to the first head piece.

2. The length-adjustable headstock structure according to claim 1, characterized in that, The slot is provided with a button slot that extends through the bottom of the slot. A portion of the button structure extends into the slot through the button slot, and a limiting part is formed on the side wall of the button slot.

3. The length-adjustable headstock structure according to claim 2, characterized in that, The first headpiece is provided with a decorative plate, which is located on the back side of the slot. The decorative plate is fixedly or detachably connected to the first headpiece. The decorative plate is made of a soft and elastic material. The button is fixed to the decorative plate, so that the button is spring-loaded and positioned on the first headpiece.

4. The length-adjustable headstock structure according to claim 2, characterized in that, The first head piece is provided with a decorative groove, the decorative groove is located on the back side of the slot, a decorative plate is provided in the decorative groove, and the decorative plate is provided with a pressing groove; The button includes a pressing section, a connecting section, a driving section, and a first elastic element. The connecting section is disposed within the decorative groove, and the decorative plate is pressed onto the connecting section. The pressing section is fixedly connected to the connecting section and extends through the pressing groove by a predetermined length. The driving section is fixedly connected to the end of the connecting section away from the pressing section and extends through the button groove by a predetermined length. The first elastic element is disposed between the connecting section and the bottom of the decorative groove to provide a driving force for the button to move away from the first tip.

5. The length-adjustable headstock structure according to claim 4, characterized in that, The bottom of the decorative groove is provided with a fixing hole, the connecting section is provided with a through hole, and the decorative panel is provided with a fixing member. The fixing member passes through the through hole and is adapted to connect with the fixing hole to install the button on the first head piece. The first elastic element is elastic foam cotton. One side of the elastic foam cotton is bonded and fixed to the connecting section, and the other side is bonded and fixed to the bottom of the decorative groove.

6. The length-adjustable headstock structure according to claim 1, characterized in that, The slot has mounting grooves on both sides, and a second elastic member is provided in the mounting groove. Limiting blocks are provided on both sides of the second head piece. The limiting blocks can reciprocate along the length of the mounting groove. One end of the second elastic member is connected to the end of the mounting groove, and the other end is connected to the limiting block, which is used to provide a driving force for the second head piece to move closer to the first head piece. A decorative side panel is provided on the side of the mounting groove away from the slot, and the decorative side panel can be detachably installed in the mounting groove.

7. The length-adjustable headstock structure according to claim 1, characterized in that, The second headpiece is provided with a limiting groove on the side near the first headpiece. The limiting member includes a fixing part, a connecting part, and an elastic protrusion. The fixing part is connected to the bottom of the limiting groove. The fixing part is provided with a hollow groove. One end of the connecting part is fixedly connected to the side wall of the hollow groove, and the other end is connected to the elastic protrusion. The connecting part is inclined so that the elastic protrusion is located on the side of the hollow groove away from the bottom of the limiting groove. When the button is pressed, the elastic protrusion can move towards the bottom of the hollow groove, so that the elastic protrusion disengages from the limiting part.

8. The length-adjustable headstock structure according to claim 1, characterized in that, The second head piece is provided with a limiting groove on the side near the first head piece. The limiting member includes a fixing part, a connecting part and an elastic protrusion. The fixing part is a plate-shaped structure and is connected to the bottom of the limiting groove. One end of the connecting part is integrally bent with the fixing part, and the other end is connected to the elastic protrusion, so that the elastic protrusion is located on the side of the connecting part away from the bottom of the limiting groove. When the button is pressed, the elastic protrusion can move towards the bottom of the limiting groove, so that the elastic protrusion disengages from the limiting part.

9. The length-adjustable headstock structure according to claim 1, characterized in that, The first headpiece is provided with a first connecting part, which is located at the end of the first headpiece away from the slot. The first connecting part is used to connect with the watch body, watch strap or watch beads. The second endpiece is provided with a second connecting part, which is located at the end of the second endpiece away from the first endpiece, and is used to connect with the watch body, watch strap or watch beads.

10. A watch strap, characterized in that, Including the length-adjustable headpiece structure as described in any one of claims 1-9, further comprising: Multiple surface particles are connected in sequence, and the second head particle is connected to the first surface particle; Alternatively, a soft adhesive tape, wherein the second end piece is connected to the end of the soft adhesive tape.

11. A watch, characterized in that, The watch includes the strap as described in claim 10, and also includes a watch body connected to the first head link.

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