Switch spring bar and watch

Abstract

A switch spring bar comprises a spring bar tube, a sliding pin, a sliding reset spring, a limiting pin, a pressing spring and a key, and a pressing opening is formed in the annular side face of the spring bar tube. One end of the sliding pin extends out of the spring bar tube and forms a first inserting part, and the other end of the sliding pin is located below the pressing opening and forms a first limiting part. The sliding reset spring sleeves the sliding pin and is in limiting connection with the inner wall of the spring bar tube and the sliding pin; one end of the limiting pin extends out of the other end of the spring bar and forms a second insertion part in insertion fit with an ear hole in the other side of the watch ear, and the other end of the limiting pin is located below the pressing opening and forms a second limiting part; the button is inserted into the pressing opening and fixedly connected with the pressing spring, the top of the button extends out of the pressing opening and forms a pressing part, and a guide slope in sliding fit with the end face of the first limiting part is formed on the side face, close to the sliding pin, of the pressing part. And the bottom of the key is positioned below the first limiting part and the second limiting part and is in limiting fit with the first limiting part and the second limiting part. The utility model also discloses a watch comprising the switch spring bar.

Description

TECHNICAL FIELD

[0001] The utility model relates to watch technical field, especially a kind of switch ear and watch. BACKGROUND

[0002] Watch ear is the steel bar for connecting watchband and watch head in watch, including round straight passage, spring located in round straight passage and two top empty ear heads set in the both ends of round straight passage and cooperate with spring.When watchband is disassembled, two ear heads of ear are pressed by tool, so that ear head retracts, the length of whole ear is shortened, the constraint of ear hole of watch head to ear is released, so that watchband is removed from watch head.For the convenience of consumer to disassemble and assemble watchband, some ears with switch are developed by industry technical personnel on the basis of traditional ear structure.For example, Chinese invention patent (CN115316762B) discloses a kind of key spring type ear mechanism and watch, which uses specific conversion mechanism to convert the downward movement of pressing key into the lateral movement of ear head, to realize the retraction of ear head.Because the ear mechanism with key needs complex mechanism to realize the conversion of movement direction, the parts used in ear structure are more, weight and volume are larger, the use scene of this kind of ear mechanism is limited by watch appearance design.In addition, because ear mechanism has many parts and complex structure, the assembly and manufacturing difficulty of ear mechanism is increased. SUMMARY

[0003] Therefore, it is necessary to provide a kind of switch ear and watch with less parts, smaller weight and volume, simple assembly and manufacturing, and wider application scene.

[0004] A kind of switch ear, comprising:

[0005] Ear tube, the ring side surface of the ear tube is provided with pressing port communicated with the inner cavity of ear tube;

[0006] Sliding pin, the sliding pin is housed in ear tube, one end of sliding pin is stretched out from one end of ear tube and forms first plug-in part slidably matched with one side ear hole of watch ear, the other end of sliding pin is located below pressing port and forms first limit part;

[0007] Sliding reset spring, the sliding reset spring is sleeved on sliding pin and is connected with the inner wall of ear tube and sliding pin limit respectively;

[0008] Limit pin, the limit pin is housed in ear tube, one end of limit pin is stretched out from the other end of ear tube and forms second plug-in part insertedly matched with the other side ear hole of watch ear, the other end of limit pin is located below pressing port and forms second limit part;

[0009] The pressing spring comprises a limiting end connected with the inner wall of the ear canal and a free end corresponding to the pressing port;

[0010] The key is inserted into the pressing port and fixedly connected with the free end of the pressing spring. The top of the key protrudes out of the pressing port and forms a pressing part. A guide inclined surface is formed on the side of the pressing part adjacent to the sliding pin and in sliding cooperation with the end surface of the first limiting part. The bottom of the key is below the first limiting part and the second limiting part and is in limiting cooperation with the first limiting part and the second limiting part.

[0011] In one of the embodiments, the ear canal comprises a first end and a second end. The first end is provided with a first through hole communicating with the inner cavity of the ear canal. The second end is provided with a second through hole communicating with the ear canal. The hole diameter of the first through hole and the hole diameter of the second through hole are both smaller than the inner diameter of the ear canal. The first inserting part protrudes from the first through hole. The second inserting part protrudes from the second through hole.

[0012] In one of the embodiments, the sliding pin further comprises a first pin body. A middle part of the first pin body adjacent to the end surface of the first through hole is protruded to form the first inserting part. An annular protrusion is arranged on the side of the first pin body adjacent to the pressing port. A first notch is arranged on the lower part of the annular protrusion adjacent to the end surface of the pressing port, so that the upper part of the annular protrusion forms the first limiting part below the pressing port. The sliding reset spring is sleeved on the first pin body and is in limiting abutment with the inner edge of the first through hole and the end surface of the annular protrusion, respectively.

[0013] In one of the embodiments, the switch ear further comprises an annular stopper accommodated in the ear canal and adjacent to the first through hole. The outer diameter of the annular stopper is greater than the hole diameter of the first through hole. The inner diameter of the annular stopper is smaller than the hole diameter of the first through hole. The annular stopper is in abutment with the inner edge of the first through hole and the sliding reset spring, respectively. The first inserting part passes through the center hole of the annular stopper.

[0014] In one of the embodiments, the limiting pin further comprises a second pin body in abutment with the inner wall of the ear canal. The edge of the second pin body adjacent to the end surface of the second through hole is in abutment with the inner edge of the second through hole. A middle part of the second pin body adjacent to the end surface of the second through hole is protruded to form the second inserting part. A second notch is arranged on the lower part of the second pin body adjacent to the end surface of the pressing port, so that the upper part of the second pin body forms the second limiting part below the pressing port.

[0015] In one of the embodiments, one end of the bottom of the key is protruded towards the first through hole to form a first limiting platform. The other end of the bottom of the key is protruded towards the second through hole to form a second limiting platform. The upper surface of the first limiting platform is in limiting cooperation with the inner wall of the first notch. The upper surface of the second limiting platform is in limiting cooperation with the inner wall of the second notch.

[0016] In one of the embodiments, the lower part of the key forms a vertical limiting surface between the upper surface of the first limiting platform and the guide slope, and the vertical limiting surface abuts against the end surface of the first limiting part when the key is not pressed by the outside.

[0017] In one of the embodiments, the first limiting part is provided with a stop surface parallel to the vertical limiting surface and an inclined surface below the stop surface and adapted to the guide slope.

[0018] In one of the embodiments, the bottom of the key is provided with a spring slot, and the pressing spring is inserted into the spring slot and abuts against the inner wall of the ear tube.

[0019] The utility model discloses still a kind of watches, and the watch includes watch head and watchband, still include the switch ear of above-mentioned, the switch ear connects the watch head and watchband.

[0020] The switch ear and the watch of the utility model are implemented, the ear head structure of original ear is optimized, so that the parts of assembled ear are mutually limited, only need to press key, it can make sliding pin retract in the direction of approaching ear tube inner cavity, to disassemble watchband, its overall structure is simple, reliable, without additional limiting, connecting parts, the number of parts involved is less, assembly and manufacturing difficulty is lower, integrated degree is high, weight and volume are smaller, simple to use, it can be very conveniently used to the connecting structure of tool-free disassembly, expand its applicable scene. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 For the structure schematic view of switch ear in an embodiment of the utility model;

[0022] Figure 2 For the cross-sectional structure schematic view of switch ear in free state in an embodiment of the utility model;

[0023] Figure 3 For the cross-sectional structure schematic view of switch ear in pressed state in an embodiment of the utility model;

[0024] Figure 4 For the explosion view of switch ear in an embodiment of the utility model. DETAILED DESCRIPTION

[0025] In order to make the above objects, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings. In the following description, many specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0026] The utility model discloses a part quantity is few, and the weight and the volume are smaller, and the assembly and the manufacture are simple, and the applicable scene is wider switch ear, this switch ear not only can be used to connect watchband and watch head, also can be used to the connection between the link of metal watchband. Figures 1-4 The switch ear of the embodiment comprises an ear tube 100, a sliding pin 200, a sliding reset spring 300, a limiting pin 400, a pressing spring 500 and a button 600. The ear tube 100 is provided with a pressing opening 110 in communication with the inner cavity of the ear tube 100. The sliding pin 200 is accommodated in the ear tube 100, one end of the sliding pin 200 extends out of one end of the ear tube 100 and forms a first plug-in part 210 in sliding cooperation with one side of the ear hole of the watch ear, and the other end of the sliding pin 200 is located below the pressing opening 110 and forms a first limiting part 220. The sliding reset spring 300 is sleeved on the sliding pin 200 and is in limiting connection with the inner wall of the ear tube 100 and the sliding pin 200 respectively. The limiting pin 400 is accommodated in the ear tube 100, one end of the limiting pin 400 extends out of the other end of the ear tube 100 and forms a second plug-in part 410 in plug-in cooperation with the other side of the ear hole of the watch ear, and the other end of the limiting pin 400 is located below the pressing opening 110 and forms a second limiting part 420. The pressing spring 500 comprises a limiting end in limiting connection with the inner wall of the ear tube 100 and a free end corresponding to the pressing opening 110. The button 600 is inserted into the pressing opening 110 and is fixedly connected with the free end of the pressing spring 500, the top of the button 600 extends out of the pressing opening 110 and forms a pressing part, a guide inclined surface 610 in sliding cooperation with the end face of the first limiting part 220 is formed on the side surface of the pressing part adjacent to the sliding pin 200, and it can be understood that the vertical section of the button 600 is in right-angled trapezoidal structure, and the bottom of the button 600 is located below the first limiting part 220 and the second limiting part 420 and is in limiting cooperation with the first limiting part 220 and the second limiting part 420.

[0027] It can be understood that in the embodiment, the button 600 is inserted into the pressing opening 110 and provides an operation part for the consumer or the operator to press and adjust the overall length of the switch ear. The pressing spring 500 is used to provide a restoring force for the button 600 to rebound after being pressed, so that the button 600 can be reset and rebound after the pressing force is removed, and to provide conditions for the next pressing of the button 600. The sliding pin 200 and the limiting pin 400 are both inserted into the ear tube 100 and located on both sides of the button 600, wherein when the end of the limiting pin 400 is inserted into the ear hole of the watch ear, the second inserting part 410 remains unchanged with the position of the ear hole, and the sliding pin 200 is used as a movable part of the switch ear. During the pressing and lifting of the button 600, the sliding pin 200 moves along the axial direction of the ear tube 100 under the action of the button 600 and the sliding reset spring 300, so that the first inserting part 210 of the sliding pin 200 extends out of the ear tube 100 or retracts into the ear tube 100, to adjust the overall length of the switch ear, and facilitate the switch ear to be taken out or installed into the ear hole of the watch head. Specifically, during the pressing of the button 600, the distance between the end surface of the first limiting part 220 and the guide inclined surface 610 increases, and the sliding pin 200 will retract in the direction close to the button 600 under the driving of the sliding reset spring 300, so that the first limiting part 220 continuously maintains the sliding cooperation with the guide inclined surface 610; when the pressing force on the button 600 is removed, the button 600 is lifted and reset under the driving of the pressing spring 500, and during the process, the guide inclined surface 610 continuously presses the first limiting part 220 and pushes the first limiting part 220 to move in the direction away from the button 600, so that the end of the sliding pin 200 extends out of the ear tube 100.

[0028] In the embodiment, the raw ear tube 100 is a thin-walled steel tube, the raw ear tube 100 includes a first end and a second end, the first end is provided with a first through hole 120 in communication with the inner cavity of the raw ear tube 100, the second end is provided with a second through hole 130 in communication with the raw ear tube 100, the hole diameter of the first through hole 120 and the hole diameter of the second through hole 130 are both smaller than the inner diameter of the raw ear tube 100, the first plug-in part 210 is extended from the first through hole 120, and the second plug-in part 410 is extended from the second through hole 130. In other words, the sliding pin 200 is arranged at the first end of the raw ear tube 100, the limiting pin 400 is arranged at the second end of the raw ear tube 100, the inner edge of the first through hole 120 is used for limiting the sliding pin 200, and the inner edge of the second through hole 130 is used for limiting the limiting pin 400, so as to avoid the sliding pin 200 and the limiting pin 400 from falling off from the raw ear tube 100. In the embodiment, the inner edge of the first through hole 120 refers to the edge of the first through hole 120 on one side in the raw ear tube 100, and the inner edge of the second through hole 130 refers to the edge of the second through hole 130 on one side in the raw ear tube 100. Preferably, the first through hole 120 is obtained by bending (or closing) the first end of the raw ear tube 100 to the axis direction of the raw ear tube 100, and the second through hole 130 is obtained by bending (or closing) the second end of the raw ear tube 100 to the axis direction of the raw ear tube 100.

[0029] Further, in the embodiment, the pressing port 110 is in a runway structure, the maximum length of the key 600 is less than or equal to the length of the pressing port 110, so that when the raw ear switch is assembled, the key 600 can be assembled into the inner cavity of the raw ear tube 100 through the pressing port 110, so as to reduce the assembly difficulty of the raw ear switch. In order to realize the limiting between the pressing spring 500 and the key 600, in an embodiment, the bottom of the key 600 is provided with a spring groove 620, the pressing spring 500 is inserted into the spring groove 620 and abuts against the inner wall of the raw ear tube 100. In the embodiment, the key 600 is actually elastically connected with the inner wall of the raw ear tube 100 through the pressing spring 500, by arranging the spring groove 620 at the bottom of the key 600, the inner wall of the spring groove 620 limits the pressing spring 500, so as to avoid the pressing spring 500 from twisting or swinging relative to the key 600 when the key 600 is pressed, and even the separation between the pressing spring 500 and the key 600, so as to ensure the reliability of the elastic connection between the key 600 and the inner wall of the raw ear tube 100. In addition, a limiting column or a limiting ring can be further fixed on the inner wall of the raw ear tube 100 at the position opposite to the pressing port 110, the limiting end of the pressing spring 500 is sleeved on the limiting column or the limiting ring, the positioning of the limiting end of the pressing spring 500 is realized, and the stability of the installation of the pressing spring 500 and the reliability of the elastic connection between the key 600 and the inner wall of the raw ear tube 100 are further improved.

[0030] In an embodiment, the sliding pin 200 further comprises a first pin body 230, a middle portion of an end surface of the first pin body 230 is protruded to form a first insertion portion 210 adjacent to the first through hole 120, a diameter of the first insertion portion 210 is smaller than a diameter of the first pin body 230, and the diameter of the first pin body 230 is smaller than an inner diameter of the ear tube 100; an annular protrusion 240 is arranged on the first pin body 230 adjacent to a side of the pressing port 110, a diameter of the annular protrusion 240 is equal to or slightly smaller than the inner diameter of the ear tube 100, a first notch 250 is arranged on the annular protrusion 240 adjacent to a lower portion of an end surface of the pressing port 110, so that an upper portion of the annular protrusion 240 forms a first limiting portion 220 below the pressing port 110, the first limiting portion 220 is used to provide limiting to a side of the button 600 adjacent to a first end of the ear tube 100; and the sliding reset spring 300 is sleeved on the first pin body 230 and is limited to abut against an inner edge of the first through hole 120 and an end surface of the annular protrusion 240, respectively. It can be understood that the sliding pin 200 is actually a three-step stepped shaft with the first notch 250 arranged on one side. When the button 600 is lifted under the driving of the pressing spring 500, the guide inclined surface 610 extrudes the first limiting portion 220, so that the sliding pin 200 moves away from the button 600, in this process, the end surface of the annular protrusion 240 and the inner edge of the first through hole 120 jointly extrude the sliding reset spring 300, so that the sliding reset spring 300 is compressed; when the pressing spring 500 is pressed, the button 600 is pressed down, an acting force of the guide inclined surface 610 on the first limiting portion 220 is reduced, the sliding reset spring 300 restores the deformation and is elongated to push the end surface of the annular protrusion 240, so that the sliding pin 200 moves towards the button 600.

[0031] In addition, in the embodiment, the switch ear further comprises an annular stop piece 700 accommodated in the ear tube 100 and adjacent to the first through hole 120, an outer diameter of the annular stop piece 700 is greater than a hole diameter of the first through hole 120, an inner diameter of the annular stop piece 700 is smaller than the hole diameter of the first through hole 120, the annular stop piece 700 abuts against the inner edge of the first through hole 120 and the sliding reset spring 300, respectively, and the first insertion portion 210 passes through a center hole 710 of the annular stop piece 700. Further preferably, the annular stop piece 700 is fixedly connected with the inner edge of the first through hole 120. By arranging the annular stop piece 700, the cooperation area of the sliding reset spring 300 and the inner edge of the first through hole 120 can be increased, so that the inner edge of the first through hole 120 is prevented from being deformed under the impact of the sliding reset spring 300, thereby avoiding the problem that the sliding reset spring 300 falls out of the ear tube 100.

[0032] The limiting pin 400 further comprises a second pin body 430 abutting against the inner wall of the ear hole 100, an edge of the second pin body 430 adjacent to one end face of the second through hole 130 abutting against the inner edge of the second through hole 130, and a second insertion part 410 formed by a protrusion on the second pin body 430 adjacent to the middle part of the one end face of the second through hole 130, the diameter of the second insertion part 410 being smaller than that of the second pin body 430, and a second notch 440 being formed on the lower part of the second pin body 430 adjacent to the one end face of the pressing opening 110, so that the upper part of the second pin body 430 forms a second limiting part 420 below the pressing opening 110, which is used to limit the side of the button 600 adjacent to the second end of the ear hole 100. It can be understood that the limiting pin 400 is actually a two-stage stepped shaft with the second notch 440 formed on one side. Further, one end of the bottom of the button 600 protrudes towards the first through hole 120 to form a first limiting platform 630, and the other end of the bottom of the button 600 protrudes towards the second through hole 130 to form a second limiting platform 640, the upper surface of the first limiting platform 630 being in limiting cooperation with the inner wall of the first notch 250, and the upper surface of the second limiting platform 640 being in limiting cooperation with the inner wall of the second notch 440. It can also be understood that the first limiting platform 630 is located below the first limiting part 220, and the second limiting platform 640 is located below the second limiting part 420, so that the limiting of the button 600 by the first limiting platform 630 and the second limiting platform 640 can avoid the button 600 from falling off from the pressing opening 110.

[0033] In addition, the lower part of the button 600 forms a vertical limiting surface 650 between the upper surface of the first limiting platform 630 and the guide inclined surface 610, the vertical limiting surface 650 abutting against the end face of the first limiting part 220 when the button 600 is not pressed from outside. Further, the first limiting part 220 is provided with a stop surface 221 parallel to the vertical limiting surface 650 and an inclined surface 222 below the stop surface 221 and adapted to the guide inclined surface 610. Before the button 600 is pressed, the stop surface 221 of the first limiting part 220 of the sliding pin 200 abuts against the vertical limiting surface 650, limiting the sliding pin 200, so that the first insertion part 210 of the sliding pin 200 remains inserted in the ear hole of the watch. When the stroke of the button 600 exceeds the height of the stop surface 221, the stop surface 221 is separated from the vertical limiting surface 650, and the first limiting part 220 no longer abuts against the vertical limiting surface 650. At this time, the inclined surface 222 contacts the guide inclined surface 610 on the button 600, and the sliding pin 200 is inwardly retracted under the action of the sliding reset spring 300 as the button 600 continues to be pressed downward. When the button 600 is released, the button 600 is bounced upward, the guide inclined surface 610 of the button 600 presses the inclined surface 222 of the first limiting part 220, and pushes the sliding pin 200 to move outward until the vertical limiting surface 650 abuts against the stop surface 221.

[0034] In this embodiment, when assembling the switch ear, the pressing spring 500 is first installed in the spring groove 620 of the key 600, and then the key 600 together with the pressing spring 500 is put into the ear tube 100 through the pressing port 110. The sliding pin 200, the sliding reset spring 300, and the annular stopper 700 are sequentially installed in the ear tube 100 through the first end of the ear tube 100, the key 600 is pressed and the sliding pin 200 is pushed inward, so that the first limiting portion 220 of the sliding pin 200 is located above the first limiting platform 630 of the key 600; the limiting pin 400 is installed from the second end of the ear tube 100, so that the second limiting portion 420 of the limiting pin 400 is located above the second limiting platform 640 of the key 600; after all the parts are installed in the ear tube 100, the two ends of the ear tube 100 are spin-pressed to close, and the assembly is completed.

[0035] Please combine Figure 2 With Figure 3 When the switch ear is in a free state, the key 600 is upwardly pushed by the pressing spring 500, the upper surface of the first limiting platform 630 of the key 600 abuts against the lower surface of the first limiting portion 220 of the sliding pin 200, the upper surface of the second limiting platform 640 of the key 600 abuts against the lower surface of the second limiting portion 420 of the sliding pin 200, and the radial limiting of the switch ear is completed. The first limiting portion 220 of the sliding pin 200 and the second limiting portion 420 of the limiting pin 400 respectively abut against the two sides of the key 600, at the same time, the sliding pin 200 is limited by the annular stopper 700, the annular stopper 700 is limited by the inner edge of the first through hole 120 of the ear tube 100, and the limiting pin 400 is limited by the inner edge of the second through hole 130 of the ear tube 100, so that all the parts are integrated in the ear tube 100.

[0036] When the key 600 is pressed, the movable space of the sliding pin 200 along the axial direction of the ear tube 100 increases with the downward movement of the key 600, under the action of the sliding reset spring 300, the sliding pin 200 moves inward until the first plug-in portion 210 of the sliding pin 200 is completely withdrawn into the ear tube 100. When the key 600 is released, the pressing spring 500 pushes the key 600 to reset, the sliding pin 200 moves outward under the extrusion of the guide inclined surface 610 of the key 600, the sliding reset spring 300 is compressed, the first plug-in portion 210 of the sliding pin 200 protrudes out of the ear tube 100, and the ear returns to the initial free state.

[0037] In addition, the utility model discloses a kind of watches, the watch includes watch head and watchband, further include the switch ear of above-mentioned, switch ear connects watch head and watchband, in addition, ear switch is connected while watch head and watchband, it can also be used to connect the band knot of metal watchband, or ear switch is used separately to connect the band knot of metal watchband, to reduce the disassembly difficulty of watch head and watchband, or reduce the disassembly difficulty of watchband band knot.

[0038] The switch ear and the watch are implemented, the ear head structure of the original ear is optimized, the parts of assembled ear are limited each other, only need to press the button 600, the sliding pin 200 can be retracted to the direction of approaching the inner cavity of ear tube 100, to disassemble watchband, its overall structure is simple and reliable, without additional limiting, connecting parts, the number of parts involved is less, assembly and manufacturing difficulty is lower, the degree of integration is high, weight and volume are smaller, simple to use, it can be very convenient to use to the connecting structure that needs tool-free disassembly, expand its applicable scenarios.

[0039] The technical features of the above-described embodiments can be combined arbitrarily, and to make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, however, as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the present application.

[0040] The above-described embodiments only express several implementation manners of the present application, the description is more specific and detailed, but it should not be understood as the limitation of the scope of the present application. It should be pointed out that, for ordinary skilled in the art, without departing from the concept of the present application, a number of variations and improvements can be made, which belong to the protection scope of the present application. Therefore, the protection scope of the present application patent should be subject to the appended claims.

Claims

1. A switchable earpiece, characterized in that, The ear tube comprises: an ear tube with a pressing opening on the ring side surface communicating with the inner cavity of the ear tube; a sliding pin accommodated in the ear tube, one end of the sliding pin protruding from one end of the ear tube and forming a first plug-in part slidingly matched with one side hole of the watch ear, the other end of the sliding pin being located below the pressing opening and forming a first limiting part; a sliding reset spring sleeved on the sliding pin and limiting connected with the inner wall of the ear tube and the sliding pin respectively; a limiting pin accommodated in the ear tube, one end of the limiting pin protruding from the other end of the ear tube and forming a second plug-in part plug-in matched with the other side hole of the watch ear, the other end of the limiting pin being located below the pressing opening and forming a second limiting part; a pressing spring comprising a limiting end limiting connected with the inner wall of the ear tube and a free end corresponding to the pressing opening; a key inserted into the pressing opening and fixedly connected with the free end of the pressing spring, the top of the key protruding out of the pressing opening and forming a pressing part, a guide inclined surface slidingly matched with the end surface of the first limiting part being formed on the side surface of the pressing part adjacent to the sliding pin, the bottom of the key being located below the first limiting part and the second limiting part and limiting matched with the first limiting part and the second limiting part.

2. The switchable earplug of claim 1, wherein, The ear tube comprises a first end and a second end, the first end is provided with a first through hole communicating with the inner cavity of the ear tube, the second end is provided with a second through hole communicating with the ear tube, the hole diameter of the first through hole and the hole diameter of the second through hole are both smaller than the inner diameter of the ear tube, the first plug-in part protrudes from the first through hole, and the second plug-in part protrudes from the second through hole.

3. The switchable ear of claim 2, wherein, The sliding pin further comprises a first pin body, a middle part of the first pin body adjacent to the end surface of the first through hole is protruded to form the first plug-in part, an annular protrusion is arranged on one side of the first pin body adjacent to the pressing opening, a first notch is arranged on the lower part of the annular protrusion adjacent to the end surface of the pressing opening, so that the upper part of the annular protrusion forms the first limiting part below the pressing opening, and the sliding reset spring is sleeved on the first pin body and limiting abuts with the inner edge of the first through hole and the end surface of the annular protrusion respectively.

4. The switch according to claim 3, wherein Further comprising an annular stopper accommodated in the ear tube and adjacent to the first through hole, the outer diameter of the annular stopper is greater than the hole diameter of the first through hole, the inner diameter of the annular stopper is smaller than the hole diameter of the first through hole, the annular stopper abuts with the inner edge of the first through hole and the sliding reset spring respectively, and the first plug-in part passes through the center hole of the annular stopper.

5. The switchable earplug of claim 3, wherein, The limiting pin further comprises a second pin body abutting with the inner wall of the ear tube, the edge of the second pin body adjacent to the end surface of the second through hole abuts with the inner edge of the second through hole, a middle part of the second pin body adjacent to the end surface of the second through hole is protruded to form the second plug-in part, and a second notch is arranged on the lower part of the second pin body adjacent to the end surface of the pressing opening, so that the upper part of the second pin body forms the second limiting part below the pressing opening.

6. The switchable ear of claim 5, wherein, The bottom end of the key is protruded towards the first through hole to form a first limiting platform, and the other end of the key bottom is protruded towards the second through hole to form a second limiting platform, the upper surface of the first limiting platform is in limiting cooperation with the inner wall of the first notch, and the upper surface of the second limiting platform is in limiting cooperation with the inner wall of the second notch.

7. The switch according to claim 6, wherein The lower part of the key forms a vertical limiting surface between the upper surface of the first limiting platform and the guide inclined surface, and the vertical limiting surface is in abutment with the end surface of the first limiting part when the key is not pressed by the outside.

8. The switchable ear according to claim 7, wherein, The first limiting part is provided with a stop surface parallel to the vertical limiting surface at one end adjacent to the key and an inclined surface below the stop surface and adapted to the guide inclined surface.

9. The switch according to claim 1, wherein The bottom of the key is provided with a spring slot, and the pressing spring is inserted into the spring slot and in abutment with the inner wall of the ear tube.

10. A watch comprising a watch head and a watch band, characterized in that, The switch ear is further connected with the watch head and the watch band.

Images