CN218844831U - A kind of anchor - Google Patents

Abstract

The embodiment of the application provides a fixer, which comprises a shell with a first opening, a rotating ball joint, an end cover and a fastener, wherein the ball head of the rotating ball joint is constrained in the shell; the end cover is inserted into the first opening, and the side walls of the end cover and the shell are provided with jacks for penetrating rod bodies; at least part of the fastener is inserted into the shell, and when the fastener is inserted to a preset depth, acting force is applied to the end cover, and the rod body assembled in place is fastened in the jack through the end cover. The fixer of the embodiment of the application is simple to assemble through interlocking of the rod body, the fastener, the end cover and the shell; the screw-free design of the end cover, the rod body and the like can be realized, the appearance of the fixator is basically not exposed by screws, and the fixator is attractive in appearance and easy to clean and disinfect.

Description

A kind of anchor

Technical Field

The application relates to the technical field of medical equipment, in particular to a fixer.

Background

Taking the application of the fixator in an operating table as an example, the fixator is provided with a shell, a universal ball head and an end cover, the universal ball head is arranged at one end of the shell, a cover plate is arranged at the other end of the shell, and the cover plate is fixed at the end part of the shell through screws. Screws need to be arranged on the cover plate in an aligning way, so that the cover plate is inconvenient to install; in addition, the screw is exposed on the appearance surface of the fixer, so that the appearance of the fixer is influenced; furthermore, when the screws are loosened, the cover plate risks falling off.

SUMMERY OF THE UTILITY MODEL

In view of this, the present application is directed to a fixing device for an end cap, which is convenient to install and not easy to fall off.

The embodiment of the application provides a fixer, includes:

a housing having a first opening;

a ball head of the rotary ball joint is constrained in the shell;

the end cover is inserted into the first opening, and jacks for penetrating the rod body are formed in the end cover and the side wall of the shell;

and the fastening piece is at least partially inserted into the shell, and can apply force to the end cover when being inserted to a preset depth, and the rod body assembled in place is fastened in the jack through the end cover.

In some embodiments, the rotational ball joint is capable of being loaded into the housing through the first opening.

In some embodiments, the housing has a second opening, the turning ball joint has a connecting rod that protrudes through the second opening to an exterior of the housing, and a ball head of the turning ball joint has a diameter that is larger than an aperture of the second opening and smaller than an aperture of the first opening.

In some embodiments, the housing has a rotational symmetry, and the centerline of the first opening and the centerline of the second opening are both located on a rotational symmetry line of the housing.

In some embodiments, the fastener has a linear displacement in a first direction during tightening, and the force applied by the fastener to the end cap has at least a component in a second direction that presses the end cap toward the shank.

In some embodiments, the direction of insertion of the shaft into the socket is a third direction, and the second direction and the third direction are two directions that are not collinear.

In one embodiment, the first direction and the second direction are perpendicular to each other, and the second direction and the third direction are perpendicular to each other.

In some embodiments, the housing is a unitary structure.

In some embodiments, a clamping groove is formed in the circumferential surface of the rod body, a positioning piece is arranged on the inner wall of the insertion hole of the end cover in an assembled mode, and the positioning piece can stretch into the clamping groove of the rod body which is assembled in place to limit the rod body to move along the extending direction of the insertion hole.

In some embodiments, the clamping groove of the rod body is an annular groove surrounding the rod body, the positioning element is a snap spring matched with the annular groove, and the snap spring and the annular groove are matched with each other to realize the positioning of the rod body;

or, be equipped with the mounting hole on the jack inner wall of end cover, the setting element install in the mounting hole, the setting element is kept away from one side of the body of rod is provided with the elastic component, the setting element is in stretch into under the effect of elastic component to the draw-in groove is inside and the part is arranged in the mounting hole, the setting element with the cooperation in circular groove allows the assembly to target in place the body of rod rotate in the jack.

In some embodiments, the insertion hole penetrates through two opposite side walls of the shell, and the rod body assembled in place can move in the insertion hole along the extension direction of the insertion hole.

In some embodiments, a position of the rod body assembled in place, which is located outside the housing, is provided with a limiting member, and the rod body can move relative to the fixer along the extending direction of the jack until the limiting member is in contact with the outer surface stop of the housing.

In some embodiments, the fastener includes a ball puller disposed in the housing, and an end of the fastener can apply a force to the ball puller in a direction closer to the ball while applying a force to the end cap.

In some embodiments, the swivel ball joint, the ball stud, and the endcap are sequentially insertable into the housing from the first opening to effect a mounting orientation of the swivel ball joint and the ball stud in the housing.

In some embodiments, the end of the fastener extends between the end cap and the ball head retainer and can simultaneously abut against the end of the end cap and the ball head retainer.

In some embodiments of the present invention, the substrate is,

at least one of the fastener and the ball top member is provided with a first wedge surface at a contact portion of the fastener and the ball top member, and the first wedge surface is used for converting linear displacement of the fastener along a first direction into linear displacement of the ball top member along a second direction; and/or the presence of a gas in the gas,

at least one of the end part of the fastener extending into the shell and the end cover is provided with a second wedge surface at the contact part of the end part of the fastener and the end cover, and the second wedge surface is used for converting the linear displacement of the fastener along the first direction into the linear displacement of the end cover along the second direction;

wherein the first direction and the second direction are perpendicular.

In some embodiments, the fastener includes a screw and a wedge disposed in the housing, the screw has one end extending into the housing and movably connected to the wedge, and the screw pushes the wedge to move linearly in a first direction during rotation, and the wedge applies force to the end cap and the ball nose pressing member simultaneously.

In some embodiments, the ball head jacking piece is provided with an accommodating cavity towards one end where the end cover is located, the accommodating cavity is open towards one side where the end cover is located, the side wall of the accommodating cavity is provided with an avoiding groove, at least part of the wedge block is located in the accommodating cavity, and the screwing piece extends into the accommodating cavity from the avoiding groove.

In some embodiments, an end surface of the side wall of the accommodating cavity is provided with a clamping opening for clamping the screwing piece, and the clamping opening is communicated with the avoiding groove.

In some embodiments, the accommodating cavity is provided with a first wedge surface, and the first wedge surface inclines towards the side where the end cover is located along the direction in which the screw element is inserted into the shell.

In some embodiments, one end of the screwing piece extending into the shell is provided with an annular groove, the wedge block is provided with a cavity, the side wall of the cavity is provided with an open groove, and the groove wall of the open groove is clamped into the annular groove.

In some embodiments, the opening of the open groove is located on an end surface of a side of the wedge facing the rotation ball joint, or the open groove is simultaneously open on an end surface of a side of the wedge facing the screw and an end surface of a side facing the rotation ball joint.

In some embodiments, the side wall of the housing is provided with a mounting hole, and the screw is arranged in the mounting hole in a penetrating way and is in threaded fit with the mounting hole.

The fixer of the embodiment of the application is simple to assemble through interlocking of the rod body, the fastener, the end cover and the shell; the screw-free design of the end cover, the rod body and the like can be realized, the appearance of the fixer is basically not exposed by screws, and the fixer is attractive in appearance and easy to clean and disinfect.

Drawings

FIG. 1 is a schematic view of a fastener according to an embodiment of the present application;

FIG. 2 is an exploded view of the rod and the structure of FIG. 1 from another perspective;

FIG. 3 is a cross-sectional view of the structure shown in FIG. 1;

FIG. 4 is a cross-sectional view of another embodiment of the fastener of the present application;

FIG. 5 is a schematic view of an embodiment of the present application illustrating an assembly of the retainer with the rod and the accessory;

fig. 6 is a schematic view illustrating an assembly of the holder, the rod and the accessory according to another embodiment of the present application.

Description of the reference numerals

A holder 100;

the insertion hole 100a;

a housing 1; a first opening 1a; a second opening 1b; a fitting hole 1c;

an end cap 2; mounting holes 2a;

a rotary ball joint 3; a ball head 31; a connecting rod 32;

a ball head urging member 4; a ball socket 4a; the accommodation chamber 4b; an avoidance groove 4c; a card entrance 4d;

a fastener 5; a screw 51; the ring grooves 51a; a handle 53; a wedge block 52; the cavity 52a; open grooves 52b; the opening 52c;

a positioning member 61; an elastic member 62;

a rod body 200; a stopper 2001; a card slot 200a;

accessory 300

Detailed Description

Embodiments of the present application will be described in further detail below with reference to the drawings and examples. The following examples are intended to illustrate the present application but are not intended to limit the scope of the present application.

In the description of the embodiments of the present application, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "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, and are only for convenience of description of the embodiments of the present application and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the embodiments of the present application. 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.

The present embodiment provides a fixing device 100, please refer to fig. 1 and 2, which includes a housing 1, a rotary ball joint 3, an end cap 2, and a fastening member 5.

The rotary ball joint 3 includes a ball head 31 and a connecting rod 32, and one end of the connecting rod 32 is connected to the ball head 31. The two are not limited, and may be at least partially integrally formed, or may be bolted, welded, or the like.

Referring to fig. 4, the housing 1 has a first opening 1a and a second opening 1b.

The ball head 31 of the rotary ball joint 3 is restrained in the shell 1; the connecting rod 32 protrudes to the outside of the housing 1 through the second opening 1b. Wherein the connecting rod 32 can be used for connecting the accessory 300.

The type of the accessory 300 is not limited, and may be, for example, a hand rest of a medical bed or the like.

It should be noted that the outer diameter of the ball head 31 is smaller than the inner diameter of the second opening 1b, and the ball head 31 is installed in the housing 1, so that the ball head 31 cannot be pulled out through the second opening 1b.

Referring to fig. 3 and 4, the end cap 2 is inserted into the first opening 1a, and the end cap 2 and the sidewall of the casing 1 are provided with insertion holes 100a for inserting the rod 200, that is, the insertion holes 100a penetrate through the sidewall of the end cap 2 and the sidewall of the casing 1.

At least a portion of the fastening member 5 is inserted into the housing 1 and may exert a force on the end cap 2 when inserted to a predetermined depth, and fasten the rod body 200, which is assembled in place, in the insertion hole 100a through the end cap 2.

Wherein the shaft 200 can be used for connecting the required accessories.

It should be noted that the direction in which the rod 200 penetrates into the insertion hole 100a is not parallel to the direction in which the end cap 2 is inserted into the first opening 1a, and the two may be in a planar intersection relationship or a spatial non-planar relationship.

It should be noted that the end cap 2 itself and the housing 1 are not directly fastened to the housing 1, so that when the fastener 5 applies a force to the end cap 2, the end cap 2 can have a certain displacement in the direction opposite to the insertion direction with respect to the housing 1. For example, the end cap 2 is in clearance fit with the first opening 1a, and the assembly position of the end cap 2 in the housing 1 is located by the rod 200.

In assembling, the rotary ball joint 3 may be assembled in the housing 1, the end cap 2 may be inserted into the first opening 1a in one direction, and the rod body 200 may be inserted into the insertion hole 100a in the other direction.

After the rod body 200 is inserted into the insertion hole 100a, since the rod body 200 is inserted through the side wall of the end cap 2 and the side wall of the shell 1, the end cap 2 and the shell 1 are constrained together by the rod body 200, the end cap 2 cannot be separated from the first opening 1a along the opposite direction of the insertion direction, and the limit of the end cap 2 is realized; in addition, when the fastening piece 5 is inserted into the preset depth, an acting force is applied to the end cover 2, the end cover 2 extrudes the rod body 200 through the side wall of the insertion hole 100a, so that the rod body 200 drives the end cover 2 to generate small displacement along the opposite direction of the insertion direction of the end cover 2, and the end cover 2 moves a certain distance relative to the shell 1, so that the end cover 2 and the shell 1 lock the rod body 200 in the insertion hole 100a, and the locking of the rod body 200 is realized.

As can be seen from the above, the fastener 100 of the embodiment of the present application is simple to assemble by interlocking the rod 200, the fastener 5, the end cap 2, and the housing 1; the screw-free design of the end cover 2, the rod body 200 and the like can be realized, no screw is exposed on the appearance of the fixer 100 basically, and the fixer 100 is attractive in appearance and easy to clean and disinfect.

Illustratively, fastener 5 has a linear displacement in a first direction during tightening, and fastener 5 applies a force to end cap 2 having at least a component in a second direction, the first and second directions being perpendicular to each other.

The second direction includes two opposite directions, including a direction from the first opening 1a to the second opening 1b, and also includes a direction from the second opening 1b to the first opening 1a.

In this embodiment, the fastener 5 applies a force to the end cap 2 opposite to the direction of insertion of the end cap 2.

The movement of the fastening piece 5 is perpendicular to the movement of the end cover 2, and the 90-degree reversing of the acting force is realized through the cooperation between the fastening piece 5 and the end cover 2, so that the fastening piece 5 is conveniently arranged on the side wall of the shell 1, the space of the side wall of the shell 1 is fully utilized, and the interference generated by the assembly of the fastening piece 5, the end cover 2 and the rotary ball joint 3 can be avoided.

Illustratively, the insertion direction of the stick body 200 into the insertion hole 100a is a third direction, and the second direction and the third direction are perpendicular to each other. That is, the insertion direction of the rod body 200 is perpendicular to the moving direction of the cap 2, so that when the fastener 5 is inserted to a predetermined depth, the cap 2 applies a shearing force to the rod body 200 substantially in a direction perpendicular to the length direction of the rod body 200, and the rod body 200 can be reliably locked in the insertion hole 100 a.

It should be noted that the first direction may not be perpendicular to the second direction, as long as the separation of the second direction can squeeze the end cap toward the rod body, and the third direction may not be perpendicular to the second direction, as long as the second direction and the third direction are two directions that are not collinear.

The assembly relationship between the rotary ball joint 3 and the housing 1 is not limited as long as the ball head 31 can be installed in the housing 1 and the rotation and the disengagement of the ball head 31 can be realized.

For example, in some embodiments, the ball head 31 may be installed in the housing 1 by a thermal expansion and contraction method, specifically, during the assembling process, the housing 1 and/or the ball head 31 is heated, the housing 1 is thermally expanded, the second opening 1b is enlarged, the ball head 31 is clamped into the housing 1 from the second opening 1b, and then the temperature is reduced and the second opening 1b is restored, so that the ball head 31 can be installed in the housing 1 without the ball head 31 being pulled out from the second opening 1b.

In other embodiments, the rotary ball joint 3 can be inserted into the housing 1 through the first opening 1a. That is, the fitting direction of the rotary ball joint 3 is the same as that of the head cover 2. During assembly, the rotary ball joint 3 is firstly installed into the shell 1 from the first opening 1a and is assembled in place, and then the end cover 2 is inserted into the first opening 1a.

Illustratively, the diameter of the ball head 31 of the rotary ball joint 3 is larger than the aperture of the second opening 1b and smaller than the aperture of the first opening 1a. In this way, the rotary ball joint 3 can be conveniently placed into the housing 1 from the first opening 1a, the ball head 31 does not need to prop open the first opening 1a in the process of passing through the first opening 1a, the assembly resistance can be reduced, and the connecting rod 32 of the rotary ball joint 3 is extended out of the second opening 1b. That is, the center of the first opening 1a and the center of the second opening 1b are substantially aligned.

For example, referring to fig. 2, the housing 1 has a rotational symmetry structure, and the center line of the first opening 1a and the center line of the second opening 1b are both located on the rotational symmetry line of the housing 1. Since the contour structure of the housing 1 has a great influence on the appearance of the holder 100, in this embodiment, the structure of the housing 1 can make the appearance of the holder 100 more neat and beautiful.

Wherein, the rotational symmetry structure is: and the pattern can be superposed with the original pattern after rotating around the symmetrical center line for a certain angle. The outer contour of the housing 1 is, for example, substantially drum-shaped or cylindrical.

Illustratively, the housing 1 is a one-piece structure. The integrated structure can enhance the structural strength and reliability of the shell 1 and can also reduce the assembly processes; the side wall of the shell 1 can be free from gaps, and the disinfection is convenient.

In some embodiments, referring to fig. 3, the insertion hole 100a only penetrates through the side wall of the same side of the end cap 2 and the shell 1, but does not penetrate through the side wall of the other side of the end cap 2 and the shell 1, the end of the rod 200 is inserted into the end cap 2, and the end of the rod 200 does not penetrate through the side wall of the opposite side of the shell 1, that is, the end of the rod 200 is not visible to the user.

In other embodiments, referring to fig. 5, the insertion hole 100a extends through two opposite side walls of the housing 1, and it is understood that the insertion hole 100a also extends through two opposite side walls of the end cap 2. The lever 200 of the housing 1, which is assembled in place, can move in the insertion hole 100a in the extending direction of the insertion hole 100a with the end cap 2 unlocking the lever 200. Wherein, the extending direction of the insertion hole 100a is the same as the length direction of the rod body 200.

That is, the insertion hole 100a is a through hole, and the rod 200 passes through the housing 1 and the cap 2 from one side of the housing 1 and passes out from the other side of the housing 1. In this embodiment, when the end cap 2 locks the rod 200, the rod 200 cannot move in the socket 100a, and when the end cap 2 unlocks the rod 200, the rod 200 can move in the socket 100a, and the holder 100 and the rod 200 have a relative linear motion therebetween.

In the embodiment where the insertion hole 100a penetrates through two opposite side walls of the housing 1, for example, referring to fig. 5 and 6, a position of the rod 200 assembled in place outside the housing 1 is provided with a limiting member 2001, and the rod 200 can move relative to the fixing member 100 along the extending direction of the insertion hole 100a until the limiting member 2001 contacts with an outer surface stop of the housing 1. The limiting member 2001 can prevent the rod body 200 from coming off the fastener 100, and serves as a limiting stopper.

The stopper 2001 may be formed in any shape, for example, a convex hull, a convex ring, or the like formed on the circumferential surface of the rod body 200, or may be a positioning pin, a rubber sleeve, or the like fastened to the rod body 200, so that the rod body 200 is prevented from coming off.

Illustratively, in some embodiments, when the end cap 2 releases the lock on the rod 200, the rod 200 can rotate in the insertion hole 100a, that is, there is relative rotation between the rod 200 and the holder 100, so as to adjust the relative position between the accessory 300 connected to the rod 200 and the accessory 300 connected to the connecting rod 32.

For example, referring to fig. 2 and 3, a locking groove 200a is formed on a circumferential surface of the rod body 200, a positioning member 61 is installed on an inner wall of the insertion hole 100a of the end cap 2, and the positioning member 61 can extend into the locking groove 200a of the rod body 200 assembled in place to limit the movement of the rod body 200 along an extending direction of the insertion hole 100 a.

In this embodiment, the rod 200 is inserted into the insertion hole 100a, the limiting member 2001 extends into the locking groove 200a, and no matter whether the end cap 2 locks the rod 200, the limiting member 2001 limits the displacement of the rod 200 along the length direction thereof, and the rod 200 cannot be inserted or removed any more.

It should be noted that, in this embodiment, although the rod body 200 cannot move along its length direction, if the limiting member 2001 does not limit its circumferential direction, the rod body 200 can still rotate in the insertion hole 100 a. However, if the stopper 2001 performs the stopper in the longitudinal direction of the rod 200 and also performs the stopper in the circumferential direction of the rod 200, the rod 200 completely loses the freedom of movement in the insertion hole 100 a.

In some embodiments, the engaging groove 200a of the rod 200 is an annular groove 51a surrounding the rod 200, the positioning element 61 is a snap spring matching with the annular groove 51a, and the snap spring and the annular groove 51a cooperate with each other to position the rod 200. The jump ring can carry out its length direction's spacing to the body of rod 200, and the body of rod 200 can rotate by the jump ring relatively.

In other embodiments, referring to fig. 2, a mounting hole 2a is formed in an inner wall of the insertion hole 100a of the end cap 2, the positioning element 61 is installed in the mounting hole 2a, an elastic element 62 is disposed on a side of the positioning element 61 away from the rod body 200, and the positioning element 61 extends into the clamping groove 200a under the action of the elastic element 62 and is partially disposed in the mounting hole 2a; wherein the fitting of the positioning member 61 and the circular groove 51a allows the rod body 200 assembled in place to rotate in the insertion hole 100 a.

In this embodiment, in the process of inserting the rod body 200, the circumferential surface of the rod body 200 presses the positioning element 61, so that the positioning element 61 moves towards one end close to the elastic body 62, moves in the mounting hole 2a towards one side of the elastic body 62, compresses the elastic body 62, and the elastic body 62 stores energy, when the rod body 200 is inserted into the end of the positioning element 61 and aligns with the slot 200a, the elastic body 62 pushes the positioning element 61 to extend into the slot 200a, and the rod body 200 cannot be inserted any more, that is, the rod body 200 is inserted in place.

The specific type of the elastic member 62 is not limited, for example, a spring, a rubber pad, etc.

Illustratively, referring to fig. 2, 3 and 4, the fastener 100 includes a ball head urging member 4 disposed in the housing 1, and an end of the fastener 5 may urge the ball head urging member 4 in a direction approaching the ball head 31 while urging the end cap 2.

In this embodiment, the same fastener 5 can lock the rotary ball joint 3 and the rod body 200 at the same time, so as to realize the function of locking two, and a user can lock the rotary ball joint 3 and the rod body 200 only by screwing the fastener 5, thereby facilitating the operation of the user, reducing the operation burden of the user, and improving the experience of the user; in addition, the structure is simple.

For example, referring to fig. 3 and 4, the bulb tightening member 4 and the end cap 2 are arranged in a straight line along the insertion direction of the end cap 2, and the bulb tightening member 4 and the end cap 2 are located at two opposite sides of the end of the fastening member 5, so that the end of the fastening member 5 is inserted between the two, i.e., the two can be applied with force at the same time.

For example, referring to fig. 3 and 4, the end of the fastening member 5 extends between the end cap 2 and the ball head fastening member 4, and can be simultaneously pressed against the end of the end cap 2 and the ball head fastening member 4. For example, during the insertion of the fastener 5, the fastener 5 applies a force to the cap 2 toward the first opening 1a and applies a force to the ball head fastening member 4 toward the second opening 1b, thereby achieving the purpose of simultaneously fastening the ball head fastening member 4 and the rod body 200.

Illustratively, the rotary ball joint 3, the ball head holding member 4, and the end cap 2 can be sequentially fitted into the housing 1 from the first opening 1a to achieve the mounting and positioning of the rotary ball joint 3 and the ball head holding member 4 in the housing 1. During the assembly process, the rotating ball joint 3 is firstly placed into the housing 1, the connecting rod 32 extends out of the second opening 1b, and then the ball head tightening piece 4 is installed, one side of the ball head tightening piece 4 facing the second opening 1b is provided with a ball socket 4a, and part of the ball head 31 is accommodated in the ball socket 4a and can rotate in the ball socket 4 a. The ball 31 is jointly constrained by the ball socket 4a and the wall of the hole around the second opening 1b. The rotary ball joint 3 and the ball head jacking piece 4 are positioned by parts in the subsequent assembly shell 1.

The shape of the inner wall of the ball socket 4a is not limited, and may be, for example, a spherical cap, a conical shape, or a shape surrounded by a plurality of inclined surfaces.

Illustratively, at least one of the fastener 5 and the ball nose fastener 4 is provided with a first wedge surface at a contact portion of the two, the first wedge surface being used for converting a linear displacement of the fastener 5 in a first direction into a linear displacement of the ball nose fastener 4 in a second direction; and/or the presence of a gas in the gas,

at least one of the end of the fastener 5 extending into the housing 1 and the end cap 2 is provided with a second wedge surface at the contact position of the two, and the second wedge surface is used for converting the linear displacement of the fastener 5 along the first direction into the linear displacement of the end cap 2 along the second direction.

Wherein the first direction and the second direction are perpendicular.

In this embodiment, the fastener 5 and the ball nose pressing member 4 are moved in directions perpendicular to each other by the first wedge surface. The movement of the fastening element 5 and the end cap 2 in mutually perpendicular directions is effected by means of the second wedge surface.

Referring to fig. 2, 3 and 4, in an embodiment, at least one of the fastener 5 and the ball top fastener 4 is provided with a first wedge surface at a contact portion of the two, and at least one of an end portion of the fastener 5 extending into the housing 1 and the end cap 2 is provided with a second wedge surface at a contact portion of the two, and a reaction force in the first direction applied to the fastener 5 by the end cap 2 and a reaction force in the first direction applied to the fastener 5 by the ball top fastener 4 are opposite to each other, so that a stress condition of the fastener 5 is improved.

The specific configuration of the fastener 5 is not limited.

Exemplarily, referring to fig. 2, the fastening member 5 includes a screw 51 and a wedge 52 disposed in the housing 1, the screw 51 is rod-shaped, one end of the screw 51 extends into the housing 1 and is movably connected with the wedge 52, specifically, a side wall of the housing 1 is provided with a mounting hole 1c, and one end of the screw 51 passes through the mounting hole 1c and extends into the housing 1. The screw 51 can push the wedge 52 to move linearly in the first direction during rotation, and force the end cover 2 and the ball head holding member 4 simultaneously through the wedge 52. That is, the wedge 52 moves only linearly while the wedge 52 does not rotate together with the screw 51.

Illustratively, the hole wall of the assembly hole 1c is provided with an internal thread, the screw 51 is provided with an external thread, the screw 51 is arranged in the assembly hole 1c in a penetrating way and is in threaded fit with the assembly hole 1c, and the insertion depth of the screw 51 can be controlled by rotating the screw 51 for a number of turns.

In some embodiments, the outer end of the screw 51 is provided with a handle 53, and the handle 53 facilitates the user's grip and application of force. The specific shape of the handle 53 is not limited, for example, in the embodiment shown in fig. 1 to 4, the handle is generally disc-shaped; in the embodiment shown in fig. 5, the handle is in the form of a long handle.

When the screw 51 is rotated in the screwing direction, the end of the screw 51 is continuously pushed towards the inside of the housing 1, the end of the screw 51 pushes the wedge 52 to continuously move forwards, the wedge 52 is wedged between the ball head jacking piece 4 and the end cap 2, and as the wedge 52 is continuously wedged, the wedge 52 simultaneously pushes the ball head jacking piece 4 and the end cap 2 to displace in the opposite direction until the wedge 52 can not be continuously wedged forwards any more, and the screw 51 can not be continuously rotated.

In some embodiments, referring to fig. 2, the wedge 52 has a first wedge surface 52d on a side facing the ball head fastening member 4, and referring to fig. 3 and 4, the ball head fastening member 4 has another first wedge surface 4e, and the two first wedge surfaces 52d and 4e are in sliding contact.

In some embodiments, referring to fig. 2, a second wedge surface 52c is disposed on a side of the wedge 52 facing the end cap 2, referring to fig. 4, another second wedge surface 2b is disposed on the end cap 2, and the two second wedge surfaces 52c and 2b are in sliding contact. So, can make voussoir 52 and bulb top tight piece 4 and end cover 2 all have great contact surface, reduce the wearing and tearing of voussoir 52, promote voussoir 52's life, and can make bulb top tight piece 4 and end cover 2 more steady.

In other embodiments, the first wedge surface may not be provided on the ball head holding member 4.

In other embodiments, the end cap 2 may not have a second wedge surface.

In other embodiments, the wedge 52 may not be provided with the first wedge surface, and only the first wedge surface may be provided on the ball nose puller 4.

In other embodiments, the wedge 52 may not be provided with a second wedge surface, and only the second wedge surface may be provided on the end cap 2.

Illustratively, referring to fig. 2, 3 and 4, an end of the ball head puller 4 facing the end cover 2 is provided with a receiving cavity 4b, the receiving cavity 4b is open to a side of the end cover 2, a side wall of the receiving cavity 4b is provided with an avoiding groove 4c, at least a part of the wedge block 52 is located in the receiving cavity 4b, and the screw 51 extends into the receiving cavity 4b from the avoiding groove 4 c.

The wedge block 52 is accommodated in the accommodating cavity 4b at least near one end of the ball head fastening member 4, on one hand, the accommodating cavity 4b plays a certain guiding role in the movement of the wedge block 52 to prevent the wedge block 52 from deflecting under the rotating action of the screwing member 51, and on the other hand, the space of the ball head fastening member 4 can be fully utilized to improve the space utilization rate, so that the structure of the fixing device 100 is more compact.

For example, referring to fig. 2, an end surface of a side wall of the accommodating chamber 4b is provided with a snap-in port 4d for the screw 51 to snap in, and the snap-in port 4d is communicated with the avoiding groove 4 c. Specifically, the snap-in mouth 4d faces one side of the end cap 2.

The rod body 200 of the screw 51 can be pushed into the escape groove 4c from the snap-in opening 4d, so that during assembly, during insertion of the screw 51, the screw 51 can be pushed through the escape groove 4c quickly, facilitating assembly.

Illustratively, referring to fig. 3 and 4, the top wall of the accommodating chamber 4b is provided with a first wedge surface 4e, and the first wedge surface 4e is inclined toward the side where the end cap 2 is located in the direction in which the screw 51 is inserted into the housing 1. Wedge 52 has a certain movement space in housing cavity 4b, and the top wall of housing cavity 4b facilitates a better guiding fit with wedge 52. The side wall of the accommodation chamber 4b facilitates increasing the contact area of the ball head holding member 4 and the inner wall of the housing 1, and improves the reliability of the ball head holding member 4.

Illustratively, referring to fig. 2 and 4, one end of the screw element 51 extending into the housing 1 is provided with a ring groove 51a, the wedge 52 has a cavity 52a, a side wall of the cavity 52a is provided with an open groove 52b, and a groove wall of the open groove 52b is snapped into the ring groove 51 a.

In this embodiment, the screw 51 is retained by the walls of the slot 52b, and the screw 51 is free to rotate within the slot 52b, but is prevented from relative movement with respect to the wedge 52 in or opposite to the wedging direction of the wedge 52. The movable connection between the screw 51 and the wedge 52 is realized by the cooperation of the groove walls of the groove 51a and the groove 52b.

Illustratively, the opening 52c of the open groove 52b is located on the end surface of the side of the wedge 52 facing the rotary ball joint 3, or the open groove 52b is open on both the end surface of the side of the wedge 52 facing the screw 51 and the end surface of the side facing the rotary ball joint 3. In this embodiment, the opening 52c facilitates the snapping of the screw 51 from the opening 52c into the open groove 52b.

The assembly process of one embodiment of the present application is described below.

S1: during assembly, the rotary ball joint 3 is first placed into the housing 1 from the first opening 1a, and the connecting rod 32 of the rotary ball joint 3 protrudes from the second opening 1b.

S2: the ball head tightening member 4 is put into the housing 1 from the first opening 1a, and the ball head 31 of the rotary ball joint 3 is fitted with the ball socket 4a of the ball head tightening member 4.

S3: the screw 51 is inserted into the housing 1 from the fitting hole 1c on the side wall of the housing 1 and extends into the accommodating cavity 4b of the ball head pressing member 4 from the avoiding groove 4 c.

S4: the wedge 52 is placed into the housing 1 from the first opening 1a and moved further into the receiving chamber 4b, and the opening 52c of the wedge 52 is aligned with the screw 51, so that the screw 51 snaps into the open groove 52b from the opening 52c.

S5: the end cap 2 is inserted into the first opening 1a.

S6: the lever 200 is inserted into the insertion hole 100a from one side of the housing 1.

And finishing the assembly.

The assembling process is simple, and special tools such as a screwdriver and a screwdriver are not needed for assembling.

The application scenario of the fixator in the embodiment of the present application is not limited.

Illustratively, the fixator of the embodiment of the application is applied to a medical bed, and different accessories are connected through the fixator, a rod body and the like.

For example, referring to FIG. 5, in some embodiments, one accessory 300 to which the holder is attached is a fingerboard.

Referring to fig. 6, in other embodiments, a plurality of accessories 300 may be assembled from two or more holders.

In the description of the present application, reference to the description of the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means 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 embodiments of the present application. In this application, 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 different embodiments or examples described herein may be combined by one skilled in the art without contradiction.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (23)

1. A fastener, comprising:

a housing having a first opening;

a ball head of the rotary ball joint is constrained in the shell;

the end cover is inserted into the first opening, and jacks for penetrating the rod body are formed in the end cover and the side wall of the shell;

and the fastening piece is at least partially inserted into the shell and can exert force on the end cover when being inserted to a preset depth, and the rod body assembled in place is fastened in the jack through the end cover.

2. The retainer of claim 1, wherein the swivel ball joint is insertable into the housing through the first opening.

3. The fixator of claim 1 wherein the housing has a second opening, the swivel ball joint has a connecting rod extending through the second opening to an exterior of the housing, and a ball head of the swivel ball joint has a diameter greater than an aperture of the second opening and less than an aperture of the first opening.

4. The holder according to claim 3, wherein the housing has a rotational symmetry, and the center line of the first opening and the center line of the second opening are located on a rotational symmetry line of the housing.

5. The fastener of claim 1, wherein the fastener has a linear displacement in a first direction during tightening, and wherein the force applied by the fastener to the end cap has at least a component in a second direction that presses the end cap toward the shank.

6. The fastener of claim 5, wherein the insertion direction of the shaft into the socket is a third direction, and the second direction and the third direction are two directions that are not collinear.

7. The holder according to claim 6, wherein the first direction is perpendicular to the second direction, and the second direction is perpendicular to the third direction.

8. The holder of claim 1, wherein the housing is a unitary structure.

9. The fixer of claim 1, wherein a slot is formed on the circumferential surface of the rod body, a positioning member is installed on the inner wall of the jack of the end cover, and the positioning member can extend into the slot of the rod body assembled in place to limit the rod body to move along the extension direction of the jack.

10. The fixer of claim 9, wherein the slot of the rod body is a circular groove surrounding the rod body, the positioning element is a snap spring matched with the circular groove, and the snap spring and the circular groove are matched with each other to realize the positioning of the rod body;

or, be equipped with the mounting hole on the inner wall of the jack of end cover, the setting element install in the mounting hole, the setting element is kept away from one side of the body of rod is provided with the elastic component, the setting element is in stretch into under the effect of elastic component to the draw-in groove is inside and the part is arranged in the mounting hole, the setting element with the cooperation in circular groove allows the assembly to target in place the body of rod rotate in the jack.

11. The holder according to claim 1, wherein the insertion hole penetrates through opposite side walls of the housing, and the rod body fitted in place is movable in the insertion hole in an extending direction of the insertion hole.

12. The fastener of claim 11, wherein a position of the rod body assembled in place outside the housing is provided with a stopper, and the rod body can move relative to the fastener along the extending direction of the insertion hole until the stopper contacts with the outer surface of the housing.

13. The holder according to any one of claims 1 to 12, wherein the holder includes a ball puller disposed in the housing, an end of the fastener being adapted to apply a force to the ball puller in a direction toward the ball while applying a force to the end cap.

14. The retainer of claim 13, wherein the ball joint, the ball ejector member, and the endcap are sequentially insertable into the housing from the first opening to effect the installed positioning of the ball joint and the ball ejector member in the housing.

15. A fastener according to claim 13, wherein an end of said fastener extends between said endcap and said ball retainer member and is simultaneously engageable against said endcap end and said ball retainer member.

16. The holder according to claim 15,

at least one of the fastener and the ball top member is provided with a first wedge surface at a contact portion of the fastener and the ball top member, the first wedge surface being used for converting linear displacement of the fastener in a first direction into linear displacement of the ball top member in a second direction; and/or the presence of a gas in the gas,

at least one of the end part of the fastener extending into the shell and the end cover is provided with a second wedge surface at the contact part of the end part and the end cover, and the second wedge surface is used for converting the linear displacement of the fastener along the first direction into the linear displacement of the end cover along the second direction;

wherein the first direction and the second direction are perpendicular.

17. The fastener of claim 15, wherein the fastener includes a screw and a wedge disposed in the housing, the screw having an end extending into the housing and movably connected to the wedge, the screw being capable of pushing the wedge to move linearly in a first direction during rotation and simultaneously applying a force to the end cap and the ball striking member via the wedge.

18. The fastener of claim 17, wherein the ball top member has a receiving cavity toward an end of the end cap, the receiving cavity being open toward a side of the end cap, a side wall of the receiving cavity being provided with an escape slot, at least a portion of the wedge being positioned in the receiving cavity, the screw extending from the escape slot into the receiving cavity.

19. The holder according to claim 18, wherein an end surface of the side wall of the receiving chamber is provided with a card insertion opening into which the screw member is inserted, and the card insertion opening communicates with the escape groove.

20. The fastener of claim 18, wherein said receiving cavity is provided with a first wedge surface, said first wedge surface being inclined toward a side of said end cap in a direction of insertion of said screw into said housing.

21. The fastener of claim 17, wherein the end of the screw member extending into the housing is provided with a circumferential groove, the wedge has a cavity, the sidewall of the cavity is provided with an open groove, and the wall of the open groove is snapped into the circumferential groove.

22. The retainer according to claim 21, wherein the opening of the open groove is located on an end surface of a side of the wedge facing the rotational ball joint, or the open groove is simultaneously open on an end surface of a side of the wedge facing the screw and an end surface of a side facing the rotational ball joint.

23. The holder according to claim 21, wherein the side wall of the housing is provided with a fitting hole, and the screw member is inserted into the fitting hole and threadedly engaged with the fitting hole.

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