Assembling structure of bar

Abstract

An assembly structure of a bar comprises the bar and a handle shaft (4). The bar comprises a bar head (3) and a bar core (1) arranged on the bar head (3); a mounting groove (11) is axially formed in one end, far away from the bat head (3), of the bat core (1); internal threads are formed on the inner wall of the mounting groove (11); the handle shaft (4) comprises a polished rod (43) and an external thread (42) which is formed at one end of the polished rod (43) and used for being matched with the internal thread; the external thread (42) of the handle shaft (4) is connected with the internal thread in a matched mode and can be contained in the installation groove (11) in a separable mode. According to the assembling structure of the bar, the scheme that the external thread of the handle shaft is detachably contained in the mounting groove is adopted, lead screw stress of a traditional handle shaft is converted into polish rod stress with high strength, the shearing resistance is higher, and the bar is not prone to being broken off.

Description

Technical Field

[0001] The utility model relates to the field of watch part structures, in particular to a stem assembly structure for a stem Background Art

[0002] In a watch structure, a stem is connected to a movement through a stem shaft to achieve the transmission connection between the stem and the movement, and further to achieve the functions of winding the movement, adjusting time and date.

[0003] The traditional stem shaft has a full-thread structure. During the assembly process, due to different sizes of watch cases, the stem shaft needs to be trimmed to an appropriate length and then the stem is tightened. In this process, the stem needs to be continuously adapted to the watch head to ensure the hand-setting and adjustment function of the stem, so that the batch assembly process of the stem is very complicated. At the same time, because the traditional stem shaft has a full-thread structure and weak shear resistance, the stem shaft often breaks during the assembly and shipment, daily use and after-sales maintenance processes. Content of the Utility Model

[0004] The purpose of the utility model is to address the above problems and propose a stem assembly structure for a stem.

[0005] The utility model proposes the following technical solutions:

[0006] The utility model proposes a stem assembly structure for a stem, including a stem and a stem shaft;

[0007] The stem includes a stem head and a stem core provided on the stem head; an installation groove is axially formed at one end of the stem core away from the stem head; internal threads are formed on the inner wall of the installation groove;

[0008] The stem shaft includes a smooth rod and external threads formed at one end of the smooth rod for cooperating with the internal threads; the external threads of the stem shaft are in mating connection with the internal threads and are detachably received inside the installation groove.

[0009] In the stem assembly structure for a stem of the utility model, the stem shaft is coaxially installed on the stem core.

[0010] In the stem assembly structure for a stem of the utility model, a connection transmission structure for driving connection with the movement is provided at one end of the stem shaft away from the external threads.

[0011] In the stem assembly structure for a stem of the utility model, a limiting groove is formed at the connection between the external threads and the smooth rod of the stem shaft; the outer wall of the smooth rod and the inner wall of the limiting groove form a shoulder; an internal chamfer is formed at the opening of the installation groove of the stem core. When the external threads of the stem shaft are in mating connection with the internal threads, the shoulder is detachably abutted against the internal chamfer, and the limiting groove is received inside the installation groove.

[0012] In the above-mentioned assembly structure of the stem of the present utility model, one or more annular sealing grooves are formed on the outer wall of the stem core, and the assembly structure of the stem includes a sealing component installed inside the sealing groove.

[0013] In the above-mentioned assembly structure of the stem of the present utility model, for a watch case, a case hole is formed on the watch case, and the assembly structure of the stem further includes a stem tube fixedly passing through the case hole, and the stem core is rotatably passed through the stem tube.

[0014] The assembly structure of the stem in this application adopts the scheme that the external thread of the arbor is detachably accommodated inside the installation groove, converting the force on the lead screw of the traditional arbor into the force on a smooth rod with higher strength, with stronger shear resistance and not easily broken. In this embodiment, the stem head is assembled on the stem core and rotates synchronously with the stem core, facilitating the user to operate and adjust. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present utility model will be further described below with reference to the drawings:

[0016] Figure 1 Fig. shows a reference diagram of the usage state of the assembly structure of the stem of the preferred embodiment of the present utility model;

[0017] Figure 2 Fig. shows Figure 1 a schematic structural diagram of the stem of the assembly structure of the stem shown;

[0018] Figure 3 Fig. shows the cooperation with Figure 2 a schematic structural diagram of the arbor of the stem shown. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] In order to make the technical solutions, technical purposes, and technical effects of the utility model clearer so that those skilled in the art can understand and implement the present utility model, the present utility model will be further described in detail below with reference to the drawings and specific embodiments.

[0020] As Figures 1-3 shown, Figure 1 Fig. shows a reference diagram of the usage state of the assembly structure of the stem of the preferred embodiment of the present utility model; Figure 2 Fig. shows Figure 1 a schematic structural diagram of the stem of the assembly structure of the stem shown; Figure 3 Fig. shows the cooperation with Figure 2 a schematic structural diagram of the arbor in cooperation with the stem shown. Specifically, the assembly structure of the stem includes the stem and the arbor 4;

[0021] The stem includes a stem head 3 and a stem core 1 provided on the stem head 3; an installation groove 11 is axially formed at one end of the stem core 1 away from the stem head 3; internal threads are formed on the inner wall of the installation groove 11;

[0022] The shank shaft 4 includes a smooth rod 43 and an external thread 42 formed at one end of the smooth rod 43 for mating with an internal thread; the external thread 42 of the shank shaft 4 is in mating connection with the internal thread and is detachably accommodated inside the installation groove 11.

[0023] The above technical solution is the basic solution. The traditional shank shaft 4 is a lead screw mechanism, that is, its outer wall is a full-thread structure. In this application, the solution that the external thread 42 of the shank shaft 4 is detachably accommodated inside the installation groove 11 is adopted, converting the force on the lead screw of the traditional shank shaft into the force on the relatively stronger smooth rod, with stronger shear resistance and not easily broken. In this embodiment, the chuck 3 is assembled on the chuck core 1 and rotates synchronously with the chuck core 1, facilitating the user's operation and adjustment.

[0024] Preferably, in this embodiment, the shank shaft 4 is coaxially installed on the chuck core 1. A connection drive structure 41 for driving connection with the movement core is provided at one end of the shank shaft 4 away from the external thread 42. The function of setting the hands is realized through the connection drive structure 41. Further, the connection drive structure 41 is a combined structure of a groove and a protrusion.

[0025] Further, in this embodiment, a limit groove 44 is provided at the connection between the external thread 42 and the smooth rod 43 of the shank shaft 4; the outer wall of the smooth rod 43 and the inner wall of the limit groove 44 form a shoulder; an internal chamfer 12 is formed at the opening of the installation groove 11 of the chuck core 1. When the external thread 42 of the shank shaft 4 is in mating connection with the internal thread, the shoulder can be detachably abutted against the internal chamfer 12, and the limit groove 44 is accommodated in the installation groove 11; realizing the limitation of the assembly length of the shank shaft and also improving the shear resistance. In this embodiment, the installation groove 11 uses the internal chamfer 12 to adjust the assembly position of the shank shaft 4 to adapt the chuck 3 to the watch case head. This structure only needs to consider the overall length and thread length of the shank shaft during design to ensure that the shank shaft can be assembled in place at one time without repeated trial assembly. The above structure simplifies the assembly process of the shank shaft and improves the shear resistance of the shank shaft without affecting the appearance and function of the chuck.

[0026] Further, one or more annular sealing grooves 13 are provided on the outer wall of the chuck core 1, and the assembly structure of the chuck includes a sealing component 14 installed inside the sealing groove 13. The waterproof function of the assembly structure of the chuck is realized through the sealing component 14.

[0027] Further, the assembly structure of the chuck is for a watch case; a case hole 5 is provided on the watch case, and the assembly structure of the chuck further includes a chuck tube 2 fixedly passing through the case hole 5, and the chuck core 1 rotatably passes through the chuck tube 2. The shank shaft 4 extends into the watch case through the inner hole of the chuck tube 2 and is connected to the movement core; the chuck core 1 is in contact with the inner circumference of the chuck tube 2 through the sealing component 14, enhancing the waterproof performance of the watch. When wearing, the user can drive the chuck core 1 to rotate relative to the chuck tube 2 by rotating the chuck 3 to drive the movement core and wind the watch or adjust the time.

[0028] To verify the rationality of the assembly structure of the present application for the bar, a comparative experiment was conducted between the assembly structure of the traditional bar (with the same material) and the assembly structure of the bar of the present application. The specific experiment is as follows:

[0029] The connection and transmission structure 41 dimensions of the two structures in cooperation with the movement core are exactly the same. The differences are as follows: The rear end of the traditional shank is a full-thread structure; for the shank of the present application, a certain length of thread is provided at its end, and the remaining shaft section is a smooth rod. The bending resistance capabilities of the two shanks were tested through the experimental results of the bending moment, and the results are shown in Table 1:

[0030]

[0031] The embodiments of the present invention have been described above in conjunction with the accompanying drawings. However, the present invention is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present invention, those of ordinary skill in the art can also make many forms without departing from the purpose of the present invention and the scope protected by the claims. All of these fall within the protection scope of the present invention.

Claims

1. An assembly structure of a bar, characterized in that, Comprising a stem and a stem shaft (4); The stem comprises a stem head (3) and a stem core (1) provided on the stem head (3); an installation groove (11) is axially formed at one end of the stem core (1) away from the stem head (3); internal threads are formed on the inner wall of the installation groove (11); The stem shaft (4) comprises a smooth rod (43) and external threads (42) formed at one end of the smooth rod (43) for mating with the internal threads; the external threads (42) of the stem shaft (4) are in mating connection with the internal threads and are detachably accommodated inside the installation groove (11).

2. The assembly structure of the bus according to claim 1, characterized in that, The stem shaft (4) is coaxially installed on the stem core (1).

3. The assembly structure of the bar according to claim 1 or 2, characterized in that, A connection transmission structure (41) for driving connection with the movement is provided at one end of the stem shaft (4) away from the external threads (42).

4. The assembly structure of the bar according to claim 1 or 2, characterized in that, A limiting groove (44) is formed at the connection between the external threads (42) and the smooth rod (43) of the stem shaft (4); the outer wall of the smooth rod (43) and the inner wall of the limiting groove (44) form a shoulder; an internal chamfer (12) is formed at the opening of the installation groove (11) of the stem core (1). When the external threads (42) of the stem shaft (4) are in mating connection with the internal threads, the shoulder is detachably abutted against the internal chamfer (12), and the limiting groove (44) is accommodated in the installation groove (11).

5. The assembly structure of the bar according to claim 4, characterized in that, One or more annular sealing grooves (13) are formed on the outer wall of the stem core (1), and the assembly structure of the stem comprises a sealing component (14) installed inside the sealing groove (13).

6. The assembly structure of the bar according to claim 5, characterized in that, For a watch case, a case hole (5) is formed in the watch case. The assembly structure of the stem further comprises a stem tube (2) fixedly passing through the case hole (5), and the stem core (1) is rotatably passed through the stem tube (2).

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