CN219963401U - Back massage instrument - Google Patents

Abstract

The utility model discloses a back massage instrument which comprises a massage instrument body, a locking assembly, a first support and a second support, wherein the first support and the second support are arranged on the massage instrument body and are hinged through a rotating shaft, and the first support and the second support can drive the massage instrument body to rotate between a flattening position and a plurality of bending positions. The locking component comprises a mounting seat, a locking piece and a locking piece, wherein the locking piece is movably mounted on the mounting seat along the axial direction of the rotating shaft, the locking piece is provided with a plurality of blocking teeth, and the locking piece can be meshed with the blocking teeth to lock the massager body in a flattening position or any bending position. According to the back massage device, the angle of the first bracket and the angle of the second bracket are adjusted through the locking assembly, so that the flattening and bending of the massage device body at different angles are realized, the massage comfort of a human body in different postures is met, and the back massage device is simple in integral structure and has higher functionality and reliability.

Description

Back massage instrument

Technical Field

The utility model relates to the technical field of massage instruments, in particular to a back massage instrument.

Background

The back massage device can massage and relax the back of a human body, relieves fatigue, has various back massage devices, such as a seat type massage device, a shoulder hanging type massage device and a backrest type massage device, but the back massage devices in the related technologies have single massage function and poor functionality.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems in the related art to some extent.

To this end, embodiments of the present utility model provide a multifunctional back massager.

The back massage device comprises a massage device body, a locking assembly, a first support and a second support, wherein the first support and the second support are arranged on the massage device body and are hinged through a rotating shaft, and the first support and the second support can drive the massage device body to rotate between a flattening position and a plurality of bending positions.

The locking assembly comprises a mounting seat, a locking piece and a locking piece, wherein the mounting seat is mounted on the first support, the locking piece is movably mounted on the mounting seat along the axial direction of the rotating shaft, the locking piece is mounted on the second support, the locking piece is provided with a plurality of blocking teeth, and the locking piece can be meshed with the blocking teeth so as to lock the massager body at the flattening position or any bending position.

According to the back massage device, the angles of the first bracket and the second bracket are adjusted through the locking assembly, so that the massage device body is flattened and bent at different angles, the flattened state can be used for back massage, the bent specific angle can be used as a pillow for sleeping at noon, the massage comfort of a human body in different postures is met, and the back massage device is simple in overall structure and has higher functionality and reliability.

In some embodiments, the first bracket has a first hinge seat, the second bracket has a second hinge seat, the shaft penetrates the first hinge seat and the second hinge seat, the mounting seat and the locking member are both mounted on the first hinge seat, the locking member is mounted on the second hinge seat, and the locking member penetrates the first hinge seat and the second hinge seat to be matched with the locking member.

In some embodiments, the first hinge seat is hollow inside, the mount is detachably mounted on the first hinge seat, the mount and the first hinge seat define a sliding cavity, and at least a portion of the locking member is slidably disposed within the sliding cavity.

In some embodiments, the locking member includes a knob, a connecting rod and a push rod, the push rod is disposed in the sliding cavity, a through hole communicated with the sliding cavity is disposed on the first support, the connecting rod is slidably disposed in the through hole along an axial direction of the rotating shaft, a first end of the connecting rod is connected with the knob, a second end of the connecting rod is connected with a first end of the push rod, a convex tooth extending along an axial direction of the rotating shaft is disposed at a second end of the push rod, and the convex tooth penetrates through the first hinge seat and the second hinge seat to be meshed with the blocking tooth.

In some embodiments, the locking assembly further includes an elastic member disposed in the sliding cavity and located on a side of the push rod away from the locking member, one end of the elastic member abuts against the push rod, and the other end of the elastic member abuts against an inner wall of the first hinge seat.

In some embodiments, the two second hinge seats are arranged at intervals along the axial direction of the rotating shaft, the first hinge seat is positioned between the two second hinge seats, the locking piece is mounted on one of the second hinge seats, the blocking teeth are arranged on the inner peripheral wall of the locking piece, and the plurality of blocking teeth are arranged at intervals along the circumferential direction of the rotating shaft.

In some embodiments, the back massager further comprises a pre-positioning assembly, the pre-positioning assembly comprises a positioning piece and a positioning disc, the positioning disc is installed on the first hinging seat, a plurality of positioning grooves are formed in the positioning disc, the positioning piece is movably installed on the second hinging seat along the axial direction of the rotating shaft, the positioning piece and the locking piece are respectively arranged on the two second hinging seats, and the end part of the positioning piece can be matched with the positioning grooves to pre-position the massager body at the flattening position or any bending position.

In some embodiments, the pre-positioning assembly further includes a baffle, the positioning member is mounted on the baffle, a first mounting groove is formed in the second hinge seat, the baffle is mounted in the first mounting groove, a second mounting groove is formed in the first hinge seat, the positioning disc is mounted in the second mounting groove, and the positioning member penetrates through the second hinge seat to be matched with the positioning disc.

In some embodiments, the positioning element is a bead screw, a mounting column extending along the axial direction of the rotating shaft is arranged on the baffle plate, the mounting column penetrates through the second hinge seat, a third mounting groove is formed in one end, adjacent to the second hinge seat, of the mounting column, and the bead screw is arranged in the third mounting groove.

In some embodiments, the positioning grooves are a plurality of, and the plurality of positioning grooves are arranged at intervals along the circumferential direction of the rotating shaft.

In some embodiments, the back massage device further comprises an outer sleeve, a first groove and a second groove are formed in the massage device body, the first support comprises a first frame body and a first decorative plate, the second support comprises a second frame body and a second decorative plate, the first frame body is embedded and installed in the first groove, the second frame body is embedded and installed in the second groove, the outer sleeve covers the massage device body, the first frame body and the second frame body, the first decorative plate is pressed on the outer sleeve and detachably connected with the first frame body, and the second decorative plate is pressed on the outer sleeve and detachably connected with the second frame body.

Drawings

Fig. 1 is a schematic view of a back massager in a flattened state according to an embodiment of the present utility model.

Fig. 2 is a schematic view of a massage device body according to an embodiment of the present utility model.

Fig. 3 is a schematic view of an exploded view of the back massager in accordance with the embodiment of the present utility model.

Fig. 4 is an exploded view of a back massager in accordance with an embodiment of the present utility model.

FIG. 5 is a schematic view of a locking assembly according to an embodiment of the present utility model.

FIG. 6 is a schematic diagram of a pre-positioning assembly according to an embodiment of the present utility model.

Fig. 7 is a schematic view of a locking element according to an embodiment of the utility model.

Fig. 8 is a schematic view of a closure according to an embodiment of the utility model.

Fig. 9 is a schematic view of a first frame according to an embodiment of the present utility model.

Fig. 10 is a schematic view of a second frame according to an embodiment of the present utility model.

Reference numerals:

1. a massage device body; 2. a first bracket; 3. a second bracket; 4. a rotating shaft; 5. a locking assembly; 6. a pre-positioning assembly;

11. a first groove; 12. a second groove;

21. a first hinge base; 22. a first frame body; 23. a first decorative plate; 24. a through hole;

31. the second hinge seat; 32. a second frame body; 33. a second decorative plate;

51. a mounting base; 52. a locking member; 53. a locking member; 54. an elastic member;

61. a positioning piece; 62. a positioning plate; 63. a baffle;

211. a second mounting groove; 212. a sliding chamber; 311. a first mounting groove;

521. a dial button; 522. a connecting rod; 523. a push rod; 5231. convex teeth; 531. a gear;

621. a positioning groove; 631. a mounting column; 6311. and a third mounting groove.

Detailed Description

Reference will now be made in detail to embodiments of the present utility model, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

The back massage device according to the embodiment of the present utility model is described below with reference to the accompanying drawings.

As shown in fig. 1 to 4, the back massage machine of the embodiment of the present utility model includes a massage machine body 1, a locking assembly 5, a first bracket 2, and a second bracket 3. The massage instrument body 1 is made of flexible memory cotton or other flexible materials, the surface of the massage instrument body 1 is a curved surface, the curved surface is designed according to the shape of a human body, the massage instrument body can be better attached to the human body, the ergonomics can be met, and the massage instrument has good comfort. The first bracket 2 and the second bracket 3 are arranged on the massager body 1, and the first bracket 2 and the second bracket 3 are connected with the massager body 1 through strong glue or bolts and play a supporting role on the massager body 1. The first bracket 2 and the second bracket 3 are hinged through the rotating shaft 4, and the first bracket 2 and the second bracket 3 can drive the massager body 1 to rotate between the flattening position and a plurality of bending positions, so that the massage and functional requirements of a human body under different postures are met.

As shown in fig. 4-5, the locking assembly 5 comprises a mounting seat 51, a locking piece 52 and a locking piece 53, wherein the locking piece 52 is matched with the locking piece 53 to realize locking of the back massage device at different angles. The mounting seat 51 is mounted on the first bracket 2, and the locking member 52 is movably mounted on the mounting seat 51 along the axial direction of the rotating shaft 4, and locking and unlocking of the first bracket 2 and the second bracket 3 for angular adjustment are realized by moving the locking member 52. As shown in fig. 4 and 8, the locking member 53 is mounted on the second bracket 3, the locking member 53 has a plurality of blocking teeth 531, and the locking member 52 can be engaged with the blocking teeth 531 to lock the massager body 1 in the flattened position or any folded position, and has high locking reliability and service life.

According to the back massage device disclosed by the embodiment of the utility model, the angles of the first bracket 2 and the second bracket 3 are adjusted through the locking component 5, so that the massage device body 1 can be flattened and bent at different angles, the back massage can be realized in a flattened state, the pillow can be folded at a certain angle, the massage comfort of a human body in different postures can be met, the whole structure is simple, and the massage device has higher functionality and reliability.

As shown in fig. 4 and fig. 9-10, in some embodiments, the first bracket 2 has a first hinge seat 21, the second bracket 3 has a second hinge seat 31, and the first hinge seat 21 and the second hinge seat 31 are respectively integrated with the first bracket 2 and the second bracket 3, and are formed by an injection molding process, so that the integrated structure has high connection strength, and the service life and reliability can be remarkably prolonged. The rotating shaft 4 penetrates through the first hinging seat 21 and the second hinging seat 31, and is relatively fixed with one of the first hinging seat and the second hinging seat through an outer hexagonal nut at one end of the rotating shaft 4. The mounting seat 51 and the locking piece 52 are both mounted on the first hinging seat 21 through bolts, the locking piece 53 is mounted on the second hinging seat 31, and the locking piece 52 penetrates through the first hinging seat 21 and the second hinging seat 31 to be matched with the locking piece 53, so that locking of different angles of the first bracket 2 and the second bracket 3 is realized.

As shown in fig. 4 and 9, in some embodiments, the first hinge base 21 is hollow, the mount 51 is detachably mounted on the first hinge base 21, the mount 51 and the first hinge base 21 define a sliding cavity 212, and at least a portion of the locking member 52 is slidably disposed within the sliding cavity 212. The mounting base 51 serves to fix the internal components and isolate the internal components from the outside, so that dust, dirt, and the like can be prevented from affecting the internal structure.

As shown in fig. 4-5 and fig. 7-8, in some embodiments, the locking member 52 includes a knob 521, a connecting rod 522 and a push rod 523, where the push rod 523 is disposed in the sliding cavity 212, the first bracket 2 is provided with a through hole 24 that communicates with the sliding cavity 212, the connecting rod 522 is slidably disposed in the through hole 24 along the axial direction of the rotating shaft 4, and the shape of the through hole 24 is consistent with the cross section of the connecting rod 522, and is rectangular or polygonal, and the polygonal structure can keep the connecting rod 522 in a single degree of freedom, prevent rotation, and have high reliability and stability during movement. The first end of connecting rod 522 links to each other with dialling the button 521 through the buckle, and the second end of connecting rod 522 links to each other with the first end of push rod 523, and the second end of push rod 523 is provided with along the axially extending tooth 5231 of pivot 4, and tooth 5231 runs through first articulated seat 21 and second articulated seat 31 in order to with keeping off tooth 531 meshing, and then realizes the locking.

Further, the connecting rod 522, the push rod 523 and the convex tooth 5231 are of an integrated structure, and are formed by injection molding through a die, so that the integrated structure not only can save assembly procedures, but also is higher in strength, and the relative position relationship is more accurate, so that the smoothness and stability of locking actions can be remarkably improved.

As shown in fig. 4-5, in some embodiments, the locking assembly 5 further includes a resilient member 54, and the resilient member 54 may be a spring or other resilient element. The elastic member 54 is disposed in the sliding cavity 212 and located at a side of the push rod 523 away from the locking member 53, one end of the elastic member 54 abuts against the push rod 523, and the other end of the elastic member 54 abuts against the inner wall of the first hinge seat 21. When the push rod 523 is not acted by an external force, the elastic element 54 resets the push rod 523. The contact position between the push rod 523 and the first hinge seat 21 and the elastic element 54 is provided with a protrusion, which is concentric with the elastic element 54 and is used for fixing the elastic element 54, and the protrusion can avoid dislocation when the elastic element 54 is compressed.

As shown in fig. 4 and 10, in some embodiments, the two second hinge bases 31 are arranged at intervals along the axial direction of the rotating shaft 4, and the first hinge base 21 is located between the two second hinge bases 31, is in clearance fit with the two second hinge bases 31, and can rotate relative to the second hinge bases 31. The locking piece 53 is installed on one of the second hinging seats 31, the blocking teeth 531 are arranged on the inner peripheral wall of the locking piece 53, the blocking teeth 531 are arranged at intervals along the circumferential direction of the rotating shaft 4, and the blocking teeth 531 and the locking piece 53 are of an integrated structure, so that the connection strength of the blocking teeth 531 and the locking piece 53 is improved.

The density of the plurality of teeth 531 circumferentially spaced along the shaft 4 is related to the minimum adjustment angle of the back massager. When the density is higher, the adjustable angle is more, and when the density is lower, the adjustable angle is less, and the minimum adjusting angle is determined by any two adjacent tooth angles.

As shown in fig. 4 and 6, in some embodiments, the back massager further includes a pre-positioning component 6, where the pre-positioning component 6 is used to determine the position angle of the first bracket 2 and the second bracket 3, and only implement pre-positioning, without a locking function, and after pre-positioning, the clearance between the protruding teeth 5231 and the blocking teeth 531 can be further ensured to be completely matched.

As shown in fig. 6, the pre-positioning assembly 6 includes a positioning member 61 and a positioning disc 62, the positioning disc 62 is mounted on the first hinge seat 21, a plurality of positioning grooves 621 are provided on the positioning disc 62, the positioning grooves 621 are uniformly arranged along the circumferential direction of the positioning disc 62, and the angle between any two adjacent positioning grooves 621 is the same as the angle between any two adjacent blocking teeth 531, so that the protruding teeth 5231 can be fully meshed with the blocking teeth 531 at the pre-positioning position. The positioning piece 61 is movably installed on the second hinge bases 31 along the axial direction of the rotating shaft 4, the positioning piece 61 and the locking piece 53 are respectively arranged on the two second hinge bases 31, and the end part of the positioning piece 61 can be matched with the positioning groove 621 to pre-position the massager body 1 in the flattening position or any bending position.

It should be noted that, when the back massager angle needs to be adjusted, the dial knob 521 is turned to open the lock, the relative positions of the first bracket 2 and the second bracket 3 are slightly rotated, and adjusted to the appropriate angle positions, the positioning piece 61 and the positioning plate 62 cooperate to pre-position the first bracket 2 and the second bracket 3 to a certain angle, and the dial knob 521 is released, so that the back massager angle adjustment can be realized, so as to meet the use requirements under different postures.

As shown in fig. 4 and 6, in some embodiments, the pre-positioning assembly 6 further includes a baffle 63, the positioning member 61 is mounted on the baffle 63, the second hinge base 31 is provided with a first mounting groove 311, the baffle 63 is mounted in the first mounting groove 311, the first hinge base 21 is provided with a second mounting groove 211, the positioning disc 62 is mounted in the second mounting groove 211, and the positioning member 61 penetrates the second hinge base 31 to be matched with the positioning disc 62. Baffle 63 and positioning disk 62 respectively with first mounting groove 311 and second mounting groove 211 lock, carry out fixed connection through buckle or bolt, the surface does not have protruding and obvious clearance, the appearance is compacter pleasing to the eye, can also play better protection and dustproof effect to the inner assembly.

As shown in fig. 4 and 6, in some embodiments, the positioning member 61 is a bead screw, the baffle 63 is provided with a mounting post 631 extending along the axial direction of the rotating shaft 4, the mounting post 631 penetrates the second hinge seat 31, one end of the mounting post 631 adjacent to the second hinge seat 31 is provided with a third mounting groove 6311, and the bead screw is disposed in the third mounting groove 6311.

As shown in fig. 6, in some embodiments, the positioning slots 621 are plural, and the plural positioning slots 621 are arranged at intervals along the circumferential direction of the rotating shaft 4. The positioning grooves 621 are circular, and a plurality of positioning grooves 621 are matched with the positioning pieces 61 to realize different angle pre-positioning.

As shown in fig. 1-2, in some embodiments, the back massager further comprises an outer sleeve (not shown), and the massager body 1 is provided with a first groove 11 and a second groove 12. The first support 2 includes first support body 22 and first decorative board 23, and the second support 3 includes second support body 32 and second decorative board 33, and first support body 22 embedding is installed in first recess 11, and the recess connection can be effectively fixed completely first support body 22 and second support body 32, avoids long-time use to take place the dislocation. The second frame 32 is embedded in the second groove 12, the outer cover is arranged on the massage device body 1, the first frame 22 and the second frame 32, the first decorative plate 23 is pressed on the outer cover and detachably connected with the first frame 22, and the second decorative plate 33 is pressed on the outer cover and detachably connected with the second frame 32. The outer sleeve is used as an exposed piece, and when the back massage instrument is used for a period of time, the detachable structure facilitates cleaning of the outer sleeve.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular 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 the utility model. In this specification, schematic representations of the above terms are not necessarily directed 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. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While the above embodiments have been shown and described, it should be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives, and variations of the above embodiments may be made by those of ordinary skill in the art without departing from the scope of the utility model.

Claims (10)

1. A back massage device, comprising:

a massage device body;

the first bracket and the second bracket are arranged on the massager body and are hinged through a rotating shaft, and the first bracket and the second bracket can drive the massager body to rotate between a flattening position and a plurality of bending positions;

the locking assembly comprises a mounting seat, a locking piece and a locking piece, wherein the mounting seat is mounted on the first support, the locking piece is movably mounted on the mounting seat along the axial direction of the rotating shaft, the locking piece is mounted on the second support, the locking piece is provided with a plurality of blocking teeth, and the locking piece can be meshed with the blocking teeth so as to lock the massager body at the flattening position or any bending position.

2. The back massager of claim 1, wherein the first bracket has a first hinge seat, the second bracket has a second hinge seat, the shaft penetrates the first hinge seat and the second hinge seat, the mount and the locking member are both mounted on the first hinge seat, the locking member is mounted on the second hinge seat, and the locking member penetrates the first hinge seat and the second hinge seat to cooperate with the locking member.

3. The back massager of claim 2, wherein the first hinge seat is hollow, the mount is removably mounted on the first hinge seat, the mount and the first hinge seat define a sliding cavity, and at least a portion of the latch is slidably disposed within the sliding cavity.

4. A back massager according to claim 3, wherein the locking member comprises a pulling button, a connecting rod and a pushing rod, the pushing rod is arranged in the sliding cavity, a through hole communicated with the sliding cavity is formed in the first support, the connecting rod is slidably arranged in the through hole along the axial direction of the rotating shaft, a first end of the connecting rod is connected with the pulling button, a second end of the connecting rod is connected with the first end of the pushing rod, a convex tooth extending along the axial direction of the rotating shaft is arranged at the second end of the pushing rod, and the convex tooth penetrates through the first hinging seat and the second hinging seat to be meshed with the blocking tooth.

5. The back massager of claim 4, wherein the locking assembly further comprises an elastic member disposed in the sliding cavity and located at a side of the push rod away from the locking member, one end of the elastic member abuts against the push rod, and the other end of the elastic member abuts against an inner wall of the first hinge seat.

6. The back massager according to claim 2, wherein the number of the second hinge seats is two, the two second hinge seats are arranged at intervals along the axial direction of the rotating shaft, the first hinge seat is positioned between the two second hinge seats, the locking piece is mounted on one of the second hinge seats, the blocking teeth are arranged on the inner peripheral wall of the locking piece, and the plurality of blocking teeth are arranged at intervals along the circumferential direction of the rotating shaft.

7. The back massager of claim 2, further comprising a pre-positioning assembly, wherein the pre-positioning assembly comprises a positioning member and a positioning plate, the positioning plate is mounted on the first hinge seat, a plurality of positioning grooves are formed in the positioning plate, the positioning member is movably mounted on the second hinge seat along the axial direction of the rotating shaft, the positioning member and the locking member are respectively arranged on the two second hinge seats, and the end portions of the positioning member can be matched with the positioning grooves to pre-position the massager body in the flattened position or any bending position.

8. The back massager of claim 7, wherein the predetermined bit assembly further comprises a baffle, the positioning member is mounted on the baffle, the second hinge seat is provided with a first mounting groove, the baffle is mounted in the first mounting groove, the first hinge seat is provided with a second mounting groove, the positioning plate is mounted in the second mounting groove, and the positioning member penetrates the second hinge seat to cooperate with the positioning plate.

9. The back massage apparatus of claim 8, wherein the positioning member is a bead screw, a mounting post extending along an axial direction of the rotating shaft is provided on the baffle plate, the mounting post penetrates through the second hinge seat, a third mounting groove is provided at an end of the mounting post adjacent to the second hinge seat, and the bead screw is provided in the third mounting groove.

10. The back massager of any one of claims 1-9, further comprising an outer sleeve, wherein the massager body is provided with a first groove and a second groove, wherein the first bracket comprises a first frame and a first decorative plate, wherein the second bracket comprises a second frame and a second decorative plate, wherein the first frame is embedded in the first groove, the second frame is embedded in the second groove, the outer sleeve covers the massager body, the first frame and the second frame, and the first decorative plate is pressed on the outer sleeve and detachably connected with the first frame, and the second decorative plate is pressed on the outer sleeve and detachably connected with the second frame.