CN111364564A - Weight of different pipe diameter hoses of self-adaptation - Google Patents

Abstract

The invention provides a weight for adapting to different diameter hoses, and relates to the technical field of bathroom accessories, comprising: a counterweight and an elastic body; there are at least two counterweights and each counterweight is formed with an open hollow Two blocking walls are formed at the opening of the hollow part, and the counterweight blocks are slidably connected relative to each other, so that the blocking walls of different counterweight blocks are in the same vertical plane; the elastic body is clamped on at least two In the hollow part of the counterweight block, a cavity is formed in the middle part of the elastic body, and two elastic clamping parts extend from the opening of the cavity. The baffle walls are displaced, correspondingly, the hose placed in the cavity is switched from the half-enclosed state to the fully-enclosed state, and the rotating counterweight correspondingly triggers the card part placed in the hollow part through the baffle wall , so that the clamping part is deformed toward the direction of clamping the hose, which is suitable for the assembly and fixing of different hoses, has high versatility and is convenient for operation.

Description

A heavy hammer adapting to different diameter hoses

technical field

The invention relates to the technical field of sanitary fittings, in particular, to a weight that adapts to hoses of different pipe diameters.

Background technique

At this stage, the weights of the extractable faucets installed on the hoses are generally divided into two categories. One is that the weights need to be customized according to the size of the hoses, and then locked on the hoses by fasteners such as bolts for fixing. Another way is to put the weight on the hose before the hose is connected.

Among them, the most direct bolts and other fasteners are used to connect the weight blocks. This method has a complex structure, and the installation and disassembly are complicated. Even after a period of use, the bolts are prone to rust, and there is a risk of not being able to disassemble. . Alternatively, a through hole is directly designed in the middle of the weight for the hose to pass through to realize the corresponding function by hanging the weight on the hose. The through-hole splicing method is only suitable for a single size hose, and there are too many restrictions on the installation steps. If the installation steps are not followed, the user will need to re-install the hose and the weight, which is extremely inconvenient.

SUMMARY OF THE INVENTION

The invention discloses a heavy hammer adapting to different pipe diameter hoses, aiming at improving the problems of complicated installation and disassembly of the existing heavy hammer and poor versatility.

The present invention adopts the following scheme:

A weight for adapting hoses of different pipe diameters, comprising: a counterweight and an elastic body; there are at least two counterweights, and each counterweight is formed with an open hollow part, the opening of the hollow part is Two blocking walls are formed, and the counterweight blocks are slidably connected relative to each other, so that the blocking walls of different counterweight blocks can be in the same vertical plane, so that the external hose can be installed into the hollow part along the opening; The elastic body is clamped and placed in the hollow parts of at least two of the counterweight blocks, and is in a semi-enclosed C-shaped structure. The middle part of the elastic body is formed with an open cavity for accommodating an external hose, and the cavity is There are two elastic clamping parts extending from the opening, and at least one of the counterweight blocks is rotated relative to the other counterweight block, so that the blocking walls of the two counterweight blocks are dislocated, and correspondingly will be placed in the cavity The inner hose is switched from the half-enclosed state to the fully-enclosed state, and the rotating counterweight correspondingly triggers the clamping part placed in the hollow part through the blocking wall, so that the clamping part faces the clamping part of the hose. Orientation deformation.

As a further improvement, the counterweight block includes a first counterweight block and a second counterweight block, the first counterweight block and the second counterweight block are sleeved and connected by a connector, and the A counterweight block is arranged to fit with the second counterweight block.

As a further improvement, the connecting piece includes a buckle with a sliding portion disposed on the end surface of any one of the counterweight blocks and a corresponding chute opened in the other counterweight, and the chute is along the rotation direction ring arrangement; the buckle is snapped and accommodated in the chute to make the end faces of the two counterweight blocks fit with each other, and when the counterweight blocks are controlled by an external force to rotate relatively, corresponding to the The sliding part of the buckle slides relative to the sliding slot.

As a further improvement, at least two buckles are provided and are arranged at intervals along the circumferential path in the rotation direction, the two buckles are correspondingly arranged in the diameter direction along the circumferential path, and each hook is correspondingly provided with one corresponding to it. of the chute.

As a further improvement, the chute has a first end and a second end along the direction of rotation, and the first end and the second end communicate with each other; when the hose is in a half-enclosed state, the clip is placed at the At the first end, when the hose is in a fully enclosed state, the hose is placed at the second end corresponding to the buckle.

As a further improvement, a support body is disposed between the end faces of the two counterweight blocks, one end of the support body is fixed on the end face of one of the counterweight blocks, and the other end of the support body is elastically abutted against the other end face. An end surface of the counterweight block is provided with a corresponding pre-tightening force after rotation following the rotation of the counterweight block, so as to relatively fasten the two counterweight blocks.

As a further improvement, the support body is fixed on the end surface of the first counterweight block, and at least one alignment hole is correspondingly opened on the end surface of the second counterweight block, and the alignment hole is provided in the On the rotation path of the support body; the alignment hole is adapted to the support body, and when the hose is in a fully enclosed state, one end corresponding to the support body is snapped into the alignment hole.

As a further improvement, the counterweight block is in the shape of a round cake, the two counterweight blocks are arranged on top of each other and can rotate relative to each other, and the hollow portion is generally located in the middle of the counterweight block.

As a further improvement, the elastic body is an elastic sheet with a gradual thickness, and its thickness gradually increases along the direction of the outer periphery; the hollow portion of the counterweight that clamps and accommodates the elastic sheet is provided with a corresponding mounting groove The installation groove is formed by at least two counterweight blocks, and the elastic sheet is assembled into the installation groove, and the cavity wall of the cavity is smoothly butted with the blocking wall of the counterweight block.

As a further improvement, a plurality of clamping protrusions are provided on the side wall of the cavity of the elastic sheet.

By adopting the above-mentioned technical scheme, the present invention can achieve the following technical effects:

In the weight of the present application, through the mutual rotation between at least two counterweight blocks, the baffle walls in the same vertical plane are displaced from each other, correspondingly, the hose accommodated in the hollow part of the counterweight block is switched from being half-enclosed to It is fully enclosed, so that the hose is limited in the enclosed space formed by the dislocation of the two open hollow parts, which greatly facilitates the disassembly and assembly of the hose. In addition, the elastic body is clamped in the hollow parts of at least two counterweight blocks, and an open cavity for accommodating external hoses is formed in the middle, and two elastic clamping parts extend from the opening of the cavity. The counterweight triggers the clamping part in the hollow part correspondingly through the blocking wall, so that the clamping part deforms in the direction of clamping the hose, so as to adapt to the assembly and fixation of various types of hoses with different pipe diameters, and has high versatility and is conducive to operate.

Description of drawings

In order to explain the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore do not It should be regarded as a limitation of the scope, and for those of ordinary skill in the art, other related drawings can also be obtained according to these drawings without any creative effort.

1 is a schematic structural diagram of a heavy hammer according to an embodiment of the present invention under a first viewing angle;

Fig. 2 is the sectional view in Fig. 1;

Fig. 3 is the dismantling schematic diagram in Fig. 1;

Fig. 4 is the structural schematic diagram of the elastic body of the weight of the embodiment of the present invention;

5 is a use state diagram of the weight of the embodiment of the present invention, wherein the hose is in a half-enclosed state in the left picture, and the hose is in a fully enclosed state in the right picture;

FIG. 6 is a cross-sectional view of FIG. 5 under one of the viewing angles;

FIG. 7 is a cross-sectional view of FIG. 2 in another state.

Icon: 1-counterweight; 1A-first weight; 1B-second weight; 11-hollow; 12-block; 2-elastic body; 21-chamber; 22-card; 23 -Clamping convex part; 3-connector; 31-buckle; 311-slide part; 32-slide groove; 4-support body; 5-alignment hole; 6-spring cover.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " rear, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, etc., or The positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, Therefore, it should not be construed as a limitation of the present invention.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined as "first" or "second" may expressly or implicitly include one or more of that feature. In the description of the present invention, "plurality" means two or more, unless otherwise expressly and specifically defined.

In the present invention, unless otherwise expressly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrated; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of the two elements or the interaction relationship between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

In the present invention, unless otherwise expressly specified and limited, a first feature "on" or "under" a second feature may include the first and second features in direct contact, or may include the first and second features Not directly but through additional features between them. Also, the first feature being "above", "over" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature is "below", "below" and "below" the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature has a lower level than the second feature.

Example

With reference to FIGS. 1 to 7 , this embodiment provides a weight for adapting hoses of different diameters, including: a counterweight 1 and an elastic body 2 .

In this embodiment, there are at least two counterweight blocks 1 , and each counterweight block 1 is formed with an open hollow portion 11 , and two blocking walls 12 are formed at the opening of the hollow portion 11 . The relative rotatable sliding connection can make the blocking walls 12 of different counterweights 1 in the same vertical plane, so that the external hose can be installed into the hollow part 11 along the opening. The elastic body 2 is clamped in the hollow parts 11 of the at least two counterweight blocks 1, and has a semi-enclosed C-shaped structure. The middle part of the elastic body 2 is formed with an open cavity 21 for accommodating the external hose, and the cavity 21 is open. The opening of the cavity 21 is extended with two elastic clips 22, through which at least one of the counterweights 1 is rotated relative to the other counterweight 1, so that the baffle walls 12 of the two counterweights 1 are dislocated, correspondingly placed on the counterweight 1. The hose in the cavity 21 is switched from the half-enclosed state to the fully-enclosed state, and the rotating counterweight 1 correspondingly triggers the card portion 22 placed in the hollow portion 11 through the blocking wall 12, so that the card portion 22 faces toward The orientation of the clamped hose is deformed.

In this embodiment, through the mutual rotation of at least two counterweight blocks 1, the baffle walls 12 on the same vertical plane are displaced from each other, correspondingly, the hose accommodated in the hollow portion 11 of the counterweight block 1 is in a half-enclosed state. By switching to the fully enclosed state, the hose is restricted in the enclosed space formed by the dislocation of the two open hollow parts 11, which greatly facilitates the disassembly and assembly of the hose. In addition, the elastic body 2 is clamped in the hollow parts 11 of the at least two counterweight blocks 1, and an open cavity 21 is formed in the middle to accommodate the external hose, and the opening of the cavity 21 extends with two elastic properties. The clamping part 22, the rotating counterweight 1 correspondingly triggers the clamping part 22 placed in the hollow part 11 through the blocking wall 12, so that the clamping part 22 is deformed in the direction of clamping the hose, so as to adapt to various pipe diameters The assembly of the hose is fixed, the versatility is high and the operation is convenient.

Please refer to FIG. 3 and FIG. 5 , in one embodiment of the present invention, the counterweight block 1 includes a first counterweight block 1A and a second counterweight block 1B. The first counterweight block 1A and the second counterweight block 1B are sleeved and connected through the connecting member 3 , and the first counterweight block 1A and the second counterweight block 1B are configured to fit together. Wherein, the counterweights 1 are respectively assembled and arranged rotatably and stacked up and down through the connecting pieces 3, so that the two counterweights 1 are stacked on each other and can rotate relative to each other, and the hollow parts 11 are aligned. More preferably, the counterweight 1 is in the shape of a round cake, and the hollow portion 11 is roughly located in the middle of the counterweight 1, so that each hollow portion 11 is always in the middle of the counterweight 1 during the rotation of the counterweight 1. , only the baffle wall 12 relatively rotates along the middle position, corresponding to gradually surrounding the hose placed in the cavity 21 .

Specifically, in this embodiment, the connecting piece 3 includes a buckle 31 with a sliding portion 311 disposed on the end face of any one of the counterweight blocks 1 and a corresponding sliding groove 32 opened in the other counterweight block 1, And the chute 32 is annularly arranged along the rotation direction. The buckle 31 is snapped and accommodated in the chute 32 so that the end faces of the two counterweights 1 are attached to each other, and when the counterweight 1 is controlled by an external force to rotate relatively, the sliding portion 311 corresponding to the buckle 31 slides relatively The slot 32 slides. The buckle 31 is protruded along the end surface of the counterweight block 1 and has a certain elastic deformation. When the two counterweights 1 are fitted together, the buckle 31 is elastically squeezed and adaptively protrudes into the chute 32 to be clamped in the chute 32 . The opening directions of the counters slide relative to each other, so that the counterweight 1 can rotate relatively through the chute 32 when the counterweight 1 is subjected to external force.

In particular, there are at least two buckles 31 and are arranged at intervals along the circumferential path in the rotation direction. The two buckles 31 are correspondingly arranged in the diameter direction along the circumferential path, and each of the buckles is correspondingly provided with a matching chute. 32. In this embodiment, the chute 32 has a first end and a second end along the rotation direction, and the first end and the second end communicate with each other. When the hose is in a half-enclosed state, the corresponding snap 31 is placed on the first end, and when the hose is in a fully enclosed state, the corresponding snap 31 is placed on the second end. The two snaps 31 are disposed opposite to each other to ensure balanced rotation between the counterweights 1 , and each chute 32 has a first end and a second end, and the sliding portion 311 of the snap 31 is at the first end of the chute 32 It slides relative to the second end, so as to determine the threshold range of rotation between the counterweight blocks 1, and each end can locate the position of the counterweight block 1 after rotation, which is convenient to rotate back and forth so as to be fast and accurate. The state of the hose in the cavity 21 (semi-enclosed or fully-enclosed) is obtained.

Preferably, in this embodiment, a support body 4 is disposed between the end faces of the two counterweight blocks 1 that are abutting against each other. One end of the support body 4 is fixed on the end face of a counterweight 1 , and the other end elastically abuts against the end face of the other counterweight 1 to follow the rotation of the counterweight 1 to provide a corresponding pre-tightening force after the rotation , so that the two counterweight blocks 1 are relatively fastened. Specifically, the support body 4 is fixed on the end surface of the first counterweight block 1A, and the end surface of the second counterweight block 1B is correspondingly provided with at least one alignment hole 5 , and the alignment hole 5 is provided in the rotation path of the support body 4 superior. The alignment hole 5 is adapted to the support body 4, so that when the support body 4 is rotated to face the alignment hole 5, one end of the support body 4 can be accommodated in the alignment hole 5 for positioning and relative preloading. effect. When the hose is fully enclosed, one end of the corresponding support body 4 is clamped into the alignment hole 5 , so that the support body 4 elastically supports the two counterweights 1 and simultaneously clamps the two counterweights 1 relative to each other. When the torsion force provided by the external force is greater than the abutment force of the support body 4 in the rotation direction in the alignment hole 5 , one end of the support body 4 is separated from the alignment hole 5 to elastically abut on the end face of the counterweight 1 . In this embodiment, the support body 4 is preferably a compression spring, and one end of the compression spring is fixed on the first counterweight 1A, and the other end is abutted on the second counterweight 1B through a spring sleeve 6 , and the spring sleeve 6 is connected to the second counterweight 1B. The alignment hole 5 is adapted so that when it is rotated to face the alignment hole 5, the end of the compression spring is abutted and accommodated in the alignment hole 5 via the spring sleeve 6, and is driven by the external torsion force. , the spring sleeve 6 is disengaged from the alignment hole 5 and abuts against the end face position of the counterweight 1 where it is located. In particular, there are at least two support members, and the circumferential paths along the rotation direction are spaced apart, and the two support members are arranged correspondingly in the diameter direction along the circumferential path to provide stable elastic support.

Please refer to FIG. 4 , FIG. 5 and FIG. 6 , in this embodiment, the elastic body 2 is an elastic sheet with a gradual thickness, and its thickness gradually increases along the direction of the outer periphery. The hollow part 11 of the counterweight 1 for clamping and accommodating the elastic sheet is correspondingly provided with a mounting groove (not shown in the figure), the mounting groove is formed by at least two counterweights 1, and the elastic sheet is assembled into the mounting groove, and its capacity The cavity wall of the cavity 21 is smoothly butted with the blocking wall 12 of the counterweight 1 . Wherein, the elastic sheet is clamped between at least two counterweight blocks 1, and the mounting groove corresponding to the assembly elasticity is formed by at least two counterweight blocks 1 combined, so that the elastic sheet is assembled in the mounting groove, and the capacity of the elastic sheet is The cavity wall where the cavity 21 is located is smoothly butted against the two blocking walls 12 of the counterweight. Specifically, when the rotational force of the counterweight 1 is less than the abutment force of the elastic sheet in the installation groove, the elastic sheet is still placed in the installation groove, and the rotating counterweight 1 is correspondingly abutted to the mounting groove through its blocking wall 12 . The clip portion 22 is an elastic sheet with a gradual thickness, so that the clip portion 22 is triggered to elastically deform in the direction of clamping the hose, thereby tightening the hose. When the rotational force of the counterweight 1 is greater than the contact force of the elastic sheet in the installation groove, the elastic sheet is relatively separated from the installation groove, and the rotating counterweight 1 drives the elastic sheet to rotate relatively in the hollow portion 11, thereby adjusting the elasticity The clamping position of the sheet to the hose makes the elastic sheet of gradual thickness abut against the baffle wall 12 in the hollow part 11 , thereby triggering the elastic deformation of the clamping part 22 in the direction of clamping the hose.

Among them, preferably, a plurality of clamping protrusions 23 are provided on the side wall of the cavity 21 of the elastic sheet. By clamping the convex portion 23 to make the connection between the elastic sheet and the hose tighter, the fixing effect is better.

The working process of the embodiment of the present invention is described in detail below:

When the external hose needs to be installed inside the counterweight block 1, the first counterweight block 1A and the second counterweight block 1B are rotated to face each other, so that the blocking walls 12 on different counterweight blocks 1 are in the same vertical position Plane, the openings of the respective hollow parts 11 are located in the same direction, the outer hose is assembled into the counterweight 1 along the opening of the hollow part 11 and accommodated in the cavity 21 of the elastic body 2, at this time the hose is half-enclosed state. When the user rotates the first counterweight 1A and/or the second counterweight 1B, at least one of the counterweights 1 rotates relative to the other counterweight 1, so that the blocking walls 12 of the two counterweights 1 are out of position, The hose placed in the cavity 21 is switched from the half-enclosed state to the fully-enclosed state, and the hose is restricted in the enclosed space formed by the dislocation of the two open hollow parts 11 . And the rotating counterweight 1 correspondingly triggers the clamping part 22 placed in the hollow part 11 through the blocking wall 12 , so that the clamping part 22 is deformed in the direction of clamping the hose, so as to realize the tightening of the hose in the counterweight 1 . solid. When it is necessary to detach the outer hose from the inside of the counterweight 1, rotate the counterweight 1 in the opposite direction, so that the first counterweight 1A and the second counterweight 1B are rotated to face each other. At this time, the two counterweights 1 is in the initial position, corresponding to the openings of the respective hollow parts 11 are located in the same direction, the two blocking walls 12 do not trigger the clamping part 22 of the elastic body 2, and then the external hose is detached from the opening in the direction of leaving the hollow part 11.

It should be mentioned that the weight of the present application is also applicable to the installation method in which the hose is directly passed through the weight. The outer hose is directly threaded through each counterweight 1 through the hollow portion 11 of the counterweight 1 , so that the weight can be installed on the hose in a fixed manner, which makes the installation methods of the weight more diverse.

The above are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions that belong to the idea of the present invention belong to the protection scope of the present invention.

Claims (10)

1. The utility model provides a weight of different pipe diameter hoses of self-adaptation which characterized in that includes:

the balancing weights are at least provided with two open type hollow parts, two blocking walls are formed at the opening of each hollow part, the balancing weights can be in relative rotating sliding connection, the blocking walls of different balancing weights can be positioned on the same vertical plane, and therefore an external hose is installed into the hollow parts along the opening;

the elastic body, the chucking is arranged in at least two in the well kenozooecium of balancing weight, be half enclosed C type structure, the middle part of elastic body is formed with open appearance chamber with the outside hose of holding, and the opening part that holds the chamber extends and has two elasticity card portions, via at least one of them balancing weight is relative another balancing weight rotating, makes two misplace mutually between the fender wall of balancing weight, and the correspondence will be arranged in the hose that holds the intracavity is switched to by half enclosed state to by full enclosed state, and the rotating the balancing weight is through keeping off the wall correspondence and triggering and arranging in this well kenozooecium the card portion for the direction deformation of card portion towards the chucking hose.

2. The weight of claim 1, wherein the weight comprises a first weight and a second weight, the first weight and the second weight are connected by a connector, and the first weight and the second weight are attached to each other.

3. The weight according to claim 2, wherein the connecting member comprises a buckle with a sliding part disposed on an end surface of one of the weights and a sliding groove correspondingly formed on the other weight, and the sliding groove is annularly disposed along the rotation direction; the buckle is clamped and accommodated in the sliding groove so that the end surfaces of the two balancing weights are attached to each other, and when the balancing weights are controlled by external force to rotate relatively, the sliding parts corresponding to the buckle slide relative to the sliding groove.

4. The weight according to claim 3, wherein the at least two hooks are spaced apart along a circumferential path of the rotation direction, the two hooks are correspondingly disposed along a diameter direction of the circumferential path, and each hook is correspondingly disposed with a sliding slot.

5. A weight according to claim 4, wherein the slide has a first end and a second end in the rotation direction, and the first end and the second end are in communication with each other; the hose is arranged at the first end corresponding to the buckle when being in a semi-surrounded state, and is arranged at the second end corresponding to the buckle when being in a fully surrounded state.

6. A weight according to claim 3, wherein a support is disposed between the abutting end surfaces of the two weight members, one end of the support is fixed to the end surface of one of the weight members, and the other end of the support is elastically abutted to the end surface of the other weight member to provide a pre-tightening force after rotation in response to rotation of the weight members, thereby relatively fastening the two weight members.

7. The weight according to claim 6, wherein the support body is fixed on the end surface of the first weight block, the end surface of the second weight block is correspondingly provided with at least one alignment hole, and the alignment hole is formed on the rotation path of the support body; the alignment hole is matched with the support body, and one end, corresponding to the support body, of the hose is clamped into the alignment hole when the hose is in a fully-surrounded state.

8. A weight according to claim 1, wherein the weight is a circular cake, two weight blocks are stacked on top of each other and can rotate relative to each other, and the hollow portion is located at substantially the middle of the weight block.

9. A weight according to claim 1, wherein the elastic body is an elastic sheet having a gradually increasing thickness, and the thickness thereof gradually increases in the outer circumferential direction; the elastic sheet is clamped and accommodated in the hollow parts of the balancing weights, mounting grooves are correspondingly formed in the hollow parts of the balancing weights, the mounting grooves are formed by at least two balancing weights, the elastic sheet is assembled in the mounting grooves, and the cavity walls of the accommodating cavities of the elastic sheet are smoothly butted with the blocking walls of the balancing weights.

10. A weight according to claim 9, wherein the side wall of the cavity of the resilient plate is provided with a plurality of gripping protrusions.

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