CN218418589U - Telescoping device and head-mounted device - Google Patents

Abstract

The utility model relates to a flexible control field provides a telescoping device and head-mounted apparatus, and wherein, the telescoping device includes: the mounting plate comprises a first guide cavity and a second guide cavity which are parallel to each other; the pressing piece penetrates through the first guide cavity; the locking part is arranged in the second guide cavity, the locking part comprises a first-stage limiting position and a second-stage limiting position, and the pressing part is used for pushing the locking part to switch between the first-stage limiting position and the second-stage limiting position along the moving direction of the pressing part. Be used for solving among the prior art manual telescoping device and receive the space restriction problem, the utility model provides a telescoping device drives locking portion at second direction intracavity linear motion through according to the piece along first direction chamber linear motion, makes locking portion switch between first order limit position and second limit, realizes according to the flexible of piece, and the range of motion that presses the piece is unanimous with flexible scope, also can realize concertina movement in limited space.

Description

Telescoping device and head-mounted device

Technical Field

The utility model relates to a flexible control technical field especially relates to a telescoping device and head-mounted apparatus.

Background

The existing manual telescopic device needs to control a moving part in two opposite directions in the process of extending and shortening so as to realize extending and shortening. This results in a limited space area, and there is not enough space for the moving member to move, and the application is limited.

SUMMERY OF THE UTILITY MODEL

The utility model provides a telescoping device and head-mounted apparatus for solve among the prior art manual telescoping device and receive the space restriction problem, press the flexible of locking part at first order limiting position and second grade limiting position's motion realization telescoping device through along a direction, press a motion range little, simple structure.

The utility model provides a telescopic device, include:

the mounting plate comprises a first guide cavity and a second guide cavity which are parallel to each other;

the pressing piece penetrates through the first guide cavity, and the first guide cavity is used for guiding the movement of the pressing piece;

the locking part is arranged in the second guide cavity, one end of the locking part is connected with the mounting plate, and the other end of the locking part is connected with the pressing piece;

the locking part comprises a first-stage limiting position and a second-stage limiting position, an interval is reserved between the first-stage limiting position and the second-stage limiting position along the moving direction of the pressing part, and the pressing part is used for pushing the locking part to switch between the first-stage limiting position and the second-stage limiting position.

According to the telescopic device provided by the utility model, the locking part comprises a reset piece, a locking block and a locking rod;

the reset piece is arranged between the locking block and the mounting plate, and the force bearing direction of the reset piece is consistent with the moving direction of the pressing piece;

the locking block is provided with a sliding groove, the locking block is connected with the pressing piece, and the sliding groove is provided with a first-stage limiting position and a second-stage limiting position;

locking pole one end with the mounting panel is connected, the other end of locking pole is in slide in the spout, and first order limiting position with switch between the second level limiting position.

According to the utility model provides a telescoping device, the length of locking lever is greater than first order limiting position with interval between the limiting position of second grade.

According to the utility model provides a telescopic device, the mounting panel be provided with the draw-in groove in the second direction chamber, the one end of lock pole is provided with first trip, first trip with the draw-in groove cooperation.

According to the utility model provides a telescoping device, the second level limiting position of locking piece is provided with the stopper, the other end of locking pole is provided with the second trip, the second trip with the stopper cooperation.

According to the utility model provides a telescoping device, locking portion still includes chucking spare, chucking spare cover is established on the locking piece, chucking spare one end with the mounting panel butt, chucking spare the other end with press the piece butt.

According to the telescopic device provided by the utility model, the telescopic device also comprises a cover plate, the cover plate is buckled on the first guide cavity and the second guide cavity and is connected with the mounting plate;

the cover plate is provided with a first pressing portion and a second pressing portion, the first pressing portion is abutted to the locking block, and the second pressing portion is abutted to the locking rod.

According to the utility model, the chute comprises a first sliding section, a first falling section, a second sliding section and a second falling section which are continuously arranged;

the head part of the first sliding section is the second-stage limiting position, and the tail part of the first sliding section is communicated with the head part of the first falling section;

the tail part of the first fallback part is close to the head part of the first sliding part, and an included angle is formed between the first fallback part and the first sliding part;

the head of the second sliding section is communicated with the tail of the first fallback section to form the first-stage limiting position, the tail of the second sliding section is communicated with the head of the second fallback section, an included angle is formed between the first fallback section and the second sliding section, and the tail of the second sliding section is far away from the head of the first sliding section;

the tail part of the second fallback section is communicated with the first sliding section, the tail part of the second fallback section is close to the head part of the first sliding section, and an included angle is formed between the second fallback section and the second sliding section.

The utility model also provides a head-wearing device, which comprises a head-wearing part, a face shielding part, a connecting rod and the telescopic device;

the connecting rod with telescoping device rotatable coupling face shielding piece with wear between the portion, the connecting rod the telescoping device wear the portion with face shielding piece forms the quadrangle.

According to the utility model provides a head-mounted apparatus, the connecting rod with the telescoping device is in the connection distance of facial shielding member, with the connecting rod with the telescoping device is in the connection distance inequality of head-mounted portion.

The utility model provides a telescoping device through pressing the piece along first direction chamber linear motion, drives locking portion at second direction intracavity linear motion, makes locking portion switch between first order limiting position and second limit, realizes pressing the flexible of piece, and then realizes telescoping device's flexible, simple structure, and the range of motion that presses the piece is unanimous with flexible scope, also can realize concertina movement in limited space.

Further, the present invention provides a headset having the above-described expansion device, and therefore having various advantages as described above.

Drawings

In order to illustrate the technical solutions of the present invention or the prior art more clearly, the drawings used in the following embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic structural view of a telescopic device provided by the present invention;

fig. 2 is a schematic view of the internal structure of the telescopic device provided by the present invention;

fig. 3 is a schematic view of the mounting plate structure provided by the present invention;

fig. 4 is a schematic structural view of the locking block provided by the present invention;

fig. 5 is one of schematic structural diagrams of the head-mounted device provided by the present invention;

fig. 6 is a perspective view of the headset of fig. 5 provided by the present invention;

fig. 7 is a second schematic structural view of the head-mounted device provided by the present invention;

fig. 8 is a moving state diagram of the face shielding member according to the present invention.

Reference numerals:

100: a head-mounted part; 110: a face shield; 101: a connecting member; 200: a moving mechanism; 210: a telescoping device; 220: a connecting rod; 201: a pressing member; 202: a lock section; 203: mounting a plate; 204: a cover plate; 221: a reset member; 222: a lock lever; 223: a locking block; 224: a clamping member; 225: a first limit end; 226: a second limit end; 227: a guide groove; 228: a limiting block; 229: a limiting bulge; 230: a plate body; 231: a first guide chamber; 232: a second guide chamber; 233: a connecting end; 234: a card slot; 240: a first pressing part; 241: a second pressing part; 250: a first sliding section; 251: a first fallback section; 252: a second sliding section; 253: a second fallback section; 254: a second limit position; 255: a first stop position; 256: a first-stage limit position; 257: the second stop position.

Detailed Description

To make the objects, technical solutions and advantages of the present invention clearer, the drawings in the present invention will be combined to clearly and completely describe the technical solutions of the present invention, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the embodiments of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, which are merely for convenience of description and simplification of the description of the embodiments of the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the embodiments of the present invention can be understood as specific cases to those of ordinary skill in the art.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.

Embodiments of the present invention will be described below with reference to fig. 1 to 8. It is to be understood that the following description is only exemplary of the present invention and is not intended to limit the present invention.

As shown in fig. 1 and 2, the present invention provides a telescopic device 210, which comprises a mounting plate 203, a pressing member 201 and a locking part 202, wherein the mounting plate 203 comprises a first guiding cavity 231 and a second guiding cavity 232 which are parallel to each other; the pressing piece 201 penetrates through the first guide cavity 231, and the first guide cavity 231 is used for guiding the movement of the pressing piece 201; the locking part 202 is arranged in the second guide cavity 232, one end of the locking part 202 is connected with the mounting plate 203, and the other end of the locking part 202 is connected with the pressing piece 201; the locking part 202 comprises a first-stage limiting position 256 and a second-stage limiting position 254, a distance is reserved between the first-stage limiting position 256 and the second-stage limiting position 254 along the moving direction of the pressing piece 201, and the pressing piece 201 is used for pushing the locking part 202 to switch between the first-stage limiting position 256 and the second-stage limiting position 254.

Specifically, the mounting plate 203 is provided with an accommodating cavity, and the accommodating cavity includes a first guide cavity 231 and a second guide cavity 232 which are parallel to each other, that is, the first guide cavity 231 and the second guide cavity 232 are arranged in parallel along the length direction of the mounting plate 203. The locking portion 202 and the pressing member 201 are both disposed in the accommodating chamber, and one end of the pressing member 201 penetrates the mounting plate 203 to be disposed in the first guide chamber 231 and is connected to the locking portion 202.

That is, the pressing member 201 is pushed along the length direction of the pressing member 201, and the pressing member 201 drives the locking portion 202 to move to the first-stage limiting position 256, for example, the retractable device 210 is shortened in a state of the first-stage limiting position 256. The pressing member 201 is pushed along the length direction of the pressing member 201 again, and the pressing member 201 drives the locking portion 202 to move to the second-stage limiting position 254, for example, the telescopic device 210 extends under the state of the second-stage limiting position 254. Along the length direction of the pressing element 201, the distance between the first-stage limit position 256 and the second-stage limit position 254 is the telescopic length of the telescopic device 210.

As shown in fig. 2 to 4, further, in an embodiment of the present invention, the locking part 202 includes a reset piece 221, a locking block 223 and a locking rod 222; the reset piece 221 is arranged between the locking block 223 and the mounting plate 203, and the force-bearing direction of the reset piece 221 is consistent with the moving direction of the pressing piece 201; the locking block 223 is provided with a sliding groove, the locking block 223 is connected with the pressing piece 201, and the sliding groove is provided with a first-stage limiting position 256 and a second-stage limiting position 254; one end of the detent lever 222 is connected to the mounting plate 203, and the other end of the detent lever 222 slides in the slide slot and switches between a first-stage limit position 256 and a second-stage limit position 254.

That is, the pushing member 201 pushes the locking block 223 to move along the direction of compressing the reset member 221, and the locking rod 222 slides in the sliding slot of the locking block 223 until the pushing member 201 pushes the locking rod 222 to the first-stage limit position 256 of the sliding slot, the locking rod 222 is locked at the first-stage limit position 256, and the telescopic device 210 is in the shortened state. Pushing the pushing element 201 again, pushing the locking block 223 by the pushing element 201 to unlock the locking rod 222, after the locking rod 222 is unlocked from the first-stage limit position 256, under the action of the reset force of the reset element 221, the locking rod 222 slides to the second-stage limit position 254 along the sliding groove, the locking rod 222 is locked at the second-stage limit position 254, and the telescopic device 210 is in an extended state.

Wherein, pressing piece 201 can be the stock structure, and length direction is unanimous with spring length direction, presses the in-process, presses along the length direction who presses piece 201. The restoring member 221 may be a spring.

In one embodiment of the present invention, the length of the detent lever 222 is greater than the distance between the first limit position 256 and the second limit position 254. That is, the length of the trajectory of the sliding movement of the lock lever 222 in the slide groove is greater than the distance between the first-stage limit position 256 and the second-stage limit position 254, and both the lock lever 222 and the lock block 223 are arranged along the length direction of the push lever.

When the retractable device 210 is in a compressed state, the restoring member 221 has a certain compressed length, so as to avoid squeezing the restoring member 221. While avoiding the collision of the lock block 223 with the mount plate 203 during the movement of the lock block 223 and avoiding the collision of the pusher 201 with the mount plate 203. Wherein, the reset piece 221 is arranged between the locking block 223 and the mounting plate 203.

With continued reference to fig. 2, the locking block 223, the reset piece 221 and the locking rod 222 are all disposed in the accommodating cavity, the pressing piece 201 slides in the accommodating cavity, and pushes the locking block 223 to move relative to the mounting plate 203, so as to achieve extension and retraction. Regarding the mounting plate 203, the mounting plate 203 includes a plate body 230 and a connecting end 233, the plate body 230 has a first guiding cavity 231 and a second guiding cavity 232, and the connecting end 233 is used for connecting with the head-wearing portion 100. The first guide chamber 231 is used for guiding the pressing member 201, and the second guide chamber 232 is used for guiding the locking block 223.

Specifically, in the other embodiments of the present invention, the locking portion 202 further includes a fastening member 224, the fastening member 224 is sleeved on the locking block 223, one end of the fastening member 224 abuts against the mounting plate 203, and the other end of the fastening member 224 abuts against the pressing member 201. That is, the retainer 224 connects the pusher 201 with the lock block 223, and restricts the movement of the pusher 201 in the width direction and does not restrict the movement of the pusher 201 in the length direction.

In other words, as shown in fig. 4, a limit projection 229 is provided on the lock block 223, the fastening member 224 is fitted over the limit projection 229, and the limit projection 229 limits the position of the fastening member 224 to prevent the fastening member 224 from moving. Wherein the stopper projection 229 is provided between the face shield 110 and the reset piece 221 in the extending and retracting direction of the extending and retracting device 210.

For example, as shown in fig. 3, the fastening member 224 may be a snap spring, the snap spring includes a first limiting end 225 and a second limiting end 226, the pressing member 201 includes a pressing protrusion, the first limiting end 225 abuts the pressing protrusion on the locking block 223, and the snap spring is disposed on the locking block 223 and moves along with the locking block 223. The second position-limiting end 226 abuts against the plate body 230.

As shown in fig. 3 and 4, in another embodiment of the present invention, a locking groove 234 is disposed in the second guiding cavity 232, and a first hook is disposed at one end of the locking rod 222, and the first hook is engaged with the locking groove 234.

In addition, in other embodiments of the present invention, the limiting block 228 is disposed at the second-stage limiting position 254 of the locking block 223, the other end of the locking rod 222 is disposed with a second hook, and the second hook is engaged with the limiting block 228. For example, the two ends of the locking rod 222 are hook-shaped, and the hook-shaped ends are respectively engaged with the engaging slot 234 and the limiting block 228. In addition, the second guide cavity 232 is provided with a notch for inserting the pressing member 201, wherein the locking groove 234 and the notch are respectively disposed on two opposite side surfaces of the accommodating cavity of the mounting plate 203.

Further, first direction chamber 231 and second direction chamber 232 are the echelonment, and the junction is provided with the halfpace between first direction chamber 231 and the second direction chamber 232, and guide way 227 has been seted up to locking piece 223, and locking piece 223 is arranged in second direction chamber 232, and guide way 227 and halfpace cooperation are convenient for locking piece 223 in the linear slip of second direction chamber 232.

In addition, as shown in fig. 1, in another optional embodiment of the present invention, the telescopic device 210 further includes a cover plate 204, and the cover plate 204 is fastened on the accommodating cavity and connected to the mounting plate 203; the cover 204 has a first pressing portion 240 and a second pressing portion 241, the first pressing portion 240 abuts against the lock block 223, and the second pressing portion 241 abuts against the lock lever 222.

In other words, the cover plate 204 is fastened to the mounting plate 203 and covers the receiving cavity, and protects the locking block 223, the reset piece 221, the locking lever 222, and the chucking member 224. The first pressing portion 240 and the second pressing portion 241 limit the locking block 223 and the locking rod 222, and prevent movement in the sliding process. For example, the first pressing portion 240 and the second pressing portion 241 are pressing pieces, a hole is formed in the cover plate 204, the pressing pieces are disposed at the hole, one end of the pressing piece is connected to the cover plate 204, and the other end of the pressing piece penetrates through the hole and is pressed on the locking block 223 and the locking rod 222.

Further, as shown in fig. 4, in an embodiment of the present invention, for the locking block 223 of the present invention, as shown by the dotted line in fig. 4, the sliding chute includes a first sliding section 250, a first falling section 251, a second sliding section 252 and a second falling section 253 which are continuously opened; the head of the first sliding section 250 is a second-stage limit position 254, the tail of the first sliding section 250 is communicated with the head of the first falling section 251, wherein the tail of the first sliding section 250 is a first stop position 255; the first slider section 250 has a slope with a first stop 255 higher than a second stop 254. Wherein, a first step surface is provided on the first sliding section 250 for preventing the locking bar 222 from sliding from the first stop position 255 to the second limit position 254; the first step surface is provided on the first sliding section 250 adjacent to the head of the first falling section 251.

The tail part of the first fallback part 251 is close to the head part of the first sliding part 250, and an included angle is formed between the first fallback part 251 and the first sliding part 250; the leading portion of second sliding segment 252 communicates with the trailing portion of first loop-back segment 251 to form a first stage limit position 256. The first falling section 251 has a slope, the head of the first falling section 251 is higher than the tail of the first falling section 251, in other words, the first stopping position 255 is higher than the first-stage limiting position 256, and the first falling section 251 is provided with a second step surface for placing the locking rod 222 to slide from the first-stage limiting position 256 to the first stopping position 255.

The tail of the second sliding section 252 is communicated with the head of the second falling section 253, an included angle is formed between the first falling section 251 and the second sliding section 252, and the tail of the second sliding section 252 is far away from the head of the first sliding section 250. The second sliding section 252 has a slope, the head of the second sliding section 252 is higher than the tail of the second sliding section 252, and a third step surface is provided between the tail of the second sliding section 252 and the second falling section 253 to prevent the locking rod from entering the second falling section 253 and sliding to the second sliding section 252.

The tail of the second loop section 253 is communicated with the first sliding section 250, the tail of the second loop section 253 is close to the head of the first sliding section 250, and an included angle is formed between the second loop section 253 and the second sliding section 252. Wherein the second drop 253 has a slope, and the head of the second drop 253 is higher than the second drop 253, that is, the head of the second drop 253 is higher than the second level limiting position 254.

Further, when the pressing member 201 is in the shortened state, that is, when one end of the locking lever 222 is located at the first-stage limit position 256, a distance is formed between the end of the pressing member 201 and the side wall of the first guide cavity 231 of the mounting plate 203, and the distance is greater than or equal to a distance from the first-stage limit position 256 to the second stop position 257, so that the pressing member 201 further moves toward the head-mounted part 100 to unlock the locking lever 222 from the first-stage limit position 256.

As shown in fig. 5 to 8, the present invention also provides a head-mounted device, including: the head-mounted part 100, the face shield 110 and the moving mechanism 200, wherein the face shield 110 is arranged on one side of the head-mounted part 100; the moving mechanism 200 includes the connecting rod 220 and the telescopic device 210 of the above embodiment, the connecting rod 220 and the telescopic device 210 are rotatably connected between the face shield 110 and the head mount 100, and the connecting rod 220, the telescopic device 210, the head mount 100, and the face shield 110 form a quadrangle.

In an application scenario of the head-mounted device, the other end of the pressing element 201 is used for connecting with the face shielding element 110 of the head-mounted device, and the locking portion 202 is used for connecting with the head-mounted portion 100 of the head-mounted device.

Specifically, the user connects the head-mount portion 100 to the head of the user, such as buckling or clipping on the head, and the facial shield 110 is disposed in front of the face of the user for shielding the face, for example, the facial shield 110 is a glasses structure for shielding the eyes of the user, and is used to view the stimulation work environment through the facial shield 110, or view the electronic pictures transmitted by the facial shield 110 through the facial shield 110. For example, the headgear 100 may be a helmet, a headband, a helmet, etc., and the facial shield 110 may be a welding helmet, shutter glasses, 3D glasses, VR glasses, etc.

The face shielding piece 110 moves up and down relative to the head-mounted part 100 through the moving mechanism 200, so that when the face shielding piece 110 is needed to shield a face, the moving mechanism 200 drives the face shielding piece 110 to move down, and when the face shielding piece 110 is not needed to shield the face, the moving mechanism 200 drives the face shielding piece 110 to move up to expose the face. For example, the facial mask 110 is VR glasses, and when the user needs to watch the virtual scene, the moving mechanism 200 drives the VR glasses to move down to the eye position of the user; when the user needs to watch the real scene, the moving mechanism 200 drives the VR glasses to move upwards, so that the VR glasses avoid the eyes of the user.

For example, the head-mounted device is an intelligent head-mounted device, and the facial mask 110 may be an intelligent display structure, and because the intelligent display structure contains more electronic components, the mass is heavier, and the existing mobile structure cannot simply, stably and reliably move the intelligent display device up relative to the head-mounted portion 100. The moving mechanism 200 of the present invention forms the moving mechanism 200 by the telescopic assembly 210 and the connecting rod 220, and realizes stable upward movement and downward movement of a heavy intelligent display structure.

As shown in fig. 7, the moving mechanism 200 is used to connect the face shield 110 with the head-mount portion 100 and drive the face shield 110 to move up and down relative to the head-mount portion 100. Specifically, one end of the pressing member 201 is rotatably connected to the head mount 100, and one end of the mounting plate 203 is rotatably connected to the face shield 110.

As shown in fig. 8, the dotted line indicates a shortened state of the expansion device 210, the solid line indicates an extended state of the expansion device 210, and in the extended state of the expansion device 210 along the length direction of the connection rod 220, the expansion device 210 pushes the face shield 110 to move upward relative to the head mount 100, exposing the face area; under the state that the telescopic device 210 is shortened along the length direction of the connecting rod 220, the telescopic device 210 drives the face shielding piece 110 to move downwards relative to the head-mounted part 100, so that the face shielding piece 110 shields the face region.

In other words, when the face shield 110 is pushed, the expansion device 210 is contracted, the face shield 110 moves downward, and when the face shield 110 is pushed again, the expansion device 210 is expanded, and the face shield 110 moves upward. Simple structure, simple operation.

Further, in some embodiments of the present invention, the connection distance between the connecting rod 220 and the telescopic device 210 on the face shield 110 is a, the connection distance between the connecting rod 220 and the telescopic device 210 on the head-wearing portion 100 is B, and the distance a is different from the distance B. For example, pitch a is less than pitch B. Wherein the relative length of the connecting rod 220 and the telescopic device 210 is set based on the inclination angle of the face shield 110.

Wherein, the head-wearing part 100 is provided with a connecting piece 101, and the connecting rod 220 and the telescopic assembly 210 are both rotatably connected with the connecting piece 101. Similarly, the connection distance between the connection rod 220 and the telescopic assembly 210 on the connection member 101 is B, and the distance a is smaller than the distance B, or the distance a is larger than the distance B.

Specifically, in an optional embodiment of the present invention, the head-mounted device further comprises a link mechanism, the link mechanism is disposed on one side of the facial shield 110, the moving mechanism 200 is disposed on the other side of the facial shield 110, and the link mechanism is disposed opposite to the moving mechanism 200.

For example, when a user presses one side of the face shield 110 to extend and retract the extending and retracting device 210 on the side, the link mechanism on the other side follows up to move the face shield 110 up and down relative to the head mount 100. Wherein, the link mechanism can be a connecting rod 220, and both ends of the connecting rod 220 are rotatably connected with the face shield 110 and the head-wearing portion 100 respectively.

Further, in another embodiment of the present invention, the head-mounted device includes two sets of moving mechanisms 200, and the two sets of moving mechanisms 200 are disposed on two sides of the head-mounted shielding member.

For example, the user presses the middle or both sides of the face shield 110, thereby causing the telescoping devices 210 of both sets of moving assemblies to simultaneously telescope, thereby effecting up and down movement of the face shield 110 relative to the headgear 100.

In one embodiment of the invention, as shown in fig. 5 and 6, the face shield 110 is placed inside the headgear portion 100. At this time, the telescopic device 210 is pushed to extend and retract, so that the user can conveniently and fast operate the telescopic device.

Specifically, the initial state of the telescopic device 210 is in an extended state, the face shielding element 110 is pressed to drive the pressing element 201 to move towards the head wearing portion 100, the pressing element 201 drives the locking block 223 to move towards the head wearing portion 100 in the process of pushing the pressing element 201, and at this time, the resetting element 221 is in the process of continuous compression. One end of the locking rod 222 is fixed to the locking groove 234, and the other end of the locking rod 222 moves upward along the slope of the first sliding section 250 from the second-stage limit position 254, and moves to the tail of the first sliding section 250, that is, the first stop position 255. At this time, the user releases the force applied to the face shielding member 110, the other end of the locking rod 222 slides down to the first-stage limiting position 256 from the first stopping position 255 along the first falling section 251 under the action of the resetting force of the resetting member 221, so that the telescopic assembly 210 is shortened, and the moving mechanism 200 drives the face shielding member 110 to move down.

The face shielding member 110 is pressed again, and the pressing member 201 drives the locking block 223 to move toward the headgear portion 100, and continues to compress the reset member 221. At this time, the lock lever 222 slides up from the first-stage limit position 256 to the head of the second falling section 253 along the second sliding section 252, i.e., the second stop position 257 stops. The user loosens the force applied to the facial shield 110, the locking rod 222 slides down to the tail from the second stopping position 257 along the second falling section 253 under the action of the restoring force, that is, slides down to the head of the first sliding section 250, that is, the second-stage limiting position 254, so as to extend the telescopic assembly 210, and the moving mechanism 200 drives the facial shield 110 to move up.

The utility model provides a telescoping device 210, through according to a 201 along first direction chamber 231 linear motion, drive locking portion 202 linear motion in second direction chamber 232, make locking portion 202 switch between first order limit position 256 and second level limit position 254, realize pressing the flexible of a 201, and then realize telescoping device 210's flexible, moreover, the steam generator is simple in structure, the motion range of pressing a 201 is unanimous with flexible scope, also can realize concertina movement in limited space.

Further, the head set according to the present invention includes the expansion device 210 as described above, and thus has various advantages as described above.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. A telescopic device, characterized by comprising:

the mounting plate comprises a first guide cavity and a second guide cavity which are parallel to each other;

the pressing piece penetrates through the first guide cavity, and the first guide cavity is used for guiding the movement of the pressing piece;

the locking part is arranged in the second guide cavity, one end of the locking part is connected with the mounting plate, and the other end of the locking part is connected with the pressing piece;

the locking part comprises a first-stage limiting position and a second-stage limiting position, an interval is reserved between the first-stage limiting position and the second-stage limiting position along the moving direction of the pressing part, and the pressing part is used for pushing the locking part to switch between the first-stage limiting position and the second-stage limiting position.

2. The telescopic device according to claim 1, wherein the latch portion comprises a reset member, a latch block and a latch lever;

the reset piece is arranged between the locking block and the mounting plate, and the force bearing direction of the reset piece is consistent with the moving direction of the pressing piece;

the locking block is provided with a sliding groove, the locking block is connected with the pressing piece, and the sliding groove is provided with a first-stage limiting position and a second-stage limiting position;

locking pole one end with the mounting panel is connected, the other end of locking pole is in slide in the spout, and first order limiting position with switch between the second level limiting position.

3. The telescopic device according to claim 2, wherein the length of the locking bar is greater than the spacing between the first and second limit positions.

4. The telescopic device according to claim 2, wherein a slot is provided in the second guide cavity of the mounting plate, and a first hook is provided at one end of the locking rod, and the first hook is engaged with the slot.

5. The telescopic device according to any one of claims 2 to 4, wherein a limiting block is arranged at the second-stage limiting position of the locking block, and a second hook is arranged at the other end of the locking rod and is matched with the limiting block.

6. The telescopic device according to any one of claims 2 to 4, wherein the locking portion further comprises a clamping member, the clamping member is sleeved on the locking block, one end of the clamping member abuts against the mounting plate, and the other end of the clamping member abuts against the pressing member.

7. The telescopic device according to any one of claims 2 to 4, further comprising a cover plate snap-fitted over the first and second guide chambers and connected to the mounting plate;

the cover plate is provided with a first pressing portion and a second pressing portion, the first pressing portion is abutted to the locking block, and the second pressing portion is abutted to the locking rod.

8. The telescopic device according to any one of claims 2 to 4, wherein the chute comprises a first sliding section, a first falling section, a second sliding section and a second falling section which are arranged in series;

the head part of the first sliding section is the second-stage limiting position, and the tail part of the first sliding section is communicated with the head part of the first falling section;

the tail part of the first fallback section is close to the head part of the first sliding section, and an included angle is formed between the first fallback section and the first sliding section;

the head part of the second sliding section is communicated with the tail part of the first fallback section to form the first-stage limiting position, the tail part of the second sliding section is communicated with the head part of the second fallback section, an included angle is formed between the first fallback section and the second sliding section, and the tail part of the second sliding section is far away from the head part of the first sliding section;

the tail part of the second falling section is communicated with the first sliding section, the tail part of the second falling section is close to the head part of the first sliding section, and an included angle is formed between the second falling section and the second sliding section.

9. A headgear comprising a headgear portion, a face shield, a connecting rod, and a telescopic device as claimed in any one of claims 1 to 8;

the connecting rod with telescoping device rotatable coupling face shielding piece with wear between the portion, the connecting rod the telescoping device wear the portion with face shielding piece forms the quadrangle.

10. The headgear of claim 9, wherein a connection distance of the connecting rod and the telescopic device at the face shield is unequal to a connection distance of the connecting rod and the telescopic device at the headgear portion.

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