Bone graft material mixer

Abstract

A bone graft material mixer is disclosed. The bone graft material mixer according to one aspect of the present invention comprises: a housing extending in one direction, and having a housing hollow portion formed therein; a shaft which is accommodated in the housing hollow portion so as to be rotatable and to be movable in the one direction, and which is at least partially exposed to the outside of the housing; and a switching member coupled to the housing, and coupled to the shaft so as to switch movement in one direction into rotation, wherein the shaft can include: a shaft body which extends in the one direction, and which is rotatably and movably accommodated in the housing hollow portion; a piston coupling part which is positioned at one end portion in the extension direction of the shaft body, and is to be coupled to an external syringe accommodating a bone graft material; and shaft threads, which are formed on the outer circumference of the shaft body, extend in a spiral shape along the one direction, and are coupled to the switching member.

Description

Bone graft mixer

[0001] The present invention relates to a bone graft material mixer, and more particularly, to a bone graft material mixer having a structure capable of preventing contamination of bone graft material and improving the efficiency of bone graft material mixing operation.

[0002] Bone grafting materials are materials that promote or induce bone regeneration, harvested from humans or other non-human organisms, such as animals or other species. Bone grafting materials are widely used to treat patients with spinal or orthopedic conditions.

[0003] Bone grafts are sometimes manufactured from a single material. For example, autologous bone (chin bone) or synthetic bone can be used as graft materials. In these cases, grafting can be difficult depending on the size or formulation of the bone graft. This is because the structure or shape of the bone graft may differ from that of the target site.

[0004] Furthermore, bone graft materials are sometimes manufactured using multiple materials. In these cases, other substances, such as medications, are sometimes mixed in addition to the bone graft material to maximize its effectiveness. In these cases, the manufactured bone graft material is in the form of a slurry.

[0005] In this case, the manufactured bone graft material is extracted from a syringe, mixed separately with other materials, and then injected into the patient. During this process, the manufactured bone graft material is exposed to the environment, posing a risk of contamination. Furthermore, even if the manufactured bone graft material is not immediately contaminated, there is still a risk of contamination after it is administered to the patient.

[0006] Therefore, a method is required to reduce the risk of contamination by minimizing contact with the outside world until the process of injecting bone graft material into the patient while making it easy to manufacture.

[0007] Japanese Patent Publication No. 2013-535284 discloses a method for processing bone graft materials using teeth, and bone graft materials processed thereby. Specifically, the disclosure discloses a method for processing bone graft materials, which involves dividing extracted teeth into individual parts and processing them, and using the respective parts individually or in combination for various purposes, such as alveolar bone grafting or alveolar bone augmentation.

[0008] However, the above-mentioned prior art only discloses a method for reducing the contamination of the manufactured bone graft material by describing a step of washing the manufactured powder to remove contaminants and residual soft tissue. In other words, the above-mentioned prior art does not provide a method for reducing the possibility of contamination by preventing the manufactured bone graft material from being exposed to the outside.

[0009] Korean Patent Publication No. 10-2011-0133761 discloses a syringe for injecting bone graft material. Specifically, the syringe is capable of preventing leakage and contamination of bone graft material by attaching a silicone cap with a thin film formed in the central portion to the front outlet of the syringe barrel.

[0010] However, the above-mentioned prior art only provides measures to reduce the potential for contamination during the injection process of bone graft materials, assuming that the bone graft material has already been manufactured. In other words, the above-mentioned prior art fails to provide measures to prevent contamination of the manufactured bone graft material throughout the entire process of manufacturing and injecting it.

[0011] Japanese Patent Publication No. 2013-535284 (September 12, 2013)

[0012] Korean Patent Publication No. 10-2011-0133761 (December 14, 2011)

[0013] The present invention is intended to solve the above problems, and an object of the present invention is to provide a bone graft material mixer having a structure capable of preventing contamination of manufactured bone graft materials.

[0014] Another object of the present invention is to provide a bone graft material mixer having a structure in which the process of manufacturing a bone graft material can be easily performed.

[0015] Another object of the present invention is to provide a bone graft material mixer having a structure in which the bone graft material is not exposed to the outside during the manufacturing and injection processes.

[0016] Another object of the present invention is to provide a bone graft material mixer having a structure that allows an intuitive understanding of a method for mixing bone graft materials.

[0017] The tasks of the present invention are not limited to the tasks mentioned above, and other tasks not mentioned will be clearly understood by those skilled in the art to which the present invention pertains from the description below.

[0018] According to one aspect of the present invention, a bone graft material mixer is provided, comprising: a housing extending in one direction and having a housing hollow formed therein; a shaft rotatably and movably received in the housing hollow and at least partially exposed to the outside of the housing; and a switching member coupled to the housing and configured to convert the movement in the one direction into the rotation, wherein the shaft comprises: a shaft body extending in the one direction and rotatably received in the housing hollow; a piston coupling portion positioned at one end of the shaft body in the extension direction and coupled with an external syringe containing a bone graft material; and a shaft thread formed on the outer periphery of the shaft body, extending in a helical shape along the one direction, and coupled with the switching member, such that a longitudinal external force applied to the shaft is at least partially converted into a rotational force by the switching member.

[0019] At this time, a bone graft material mixer may be provided, wherein the switching member includes a shaft support member that movably and rotatably supports the shaft body; and a switching projection that is coupled to the shaft support member and coupled to the shaft screw thread.

[0020] In addition, the shaft support member may include a support hollow formed through the one direction and through which the shaft body is movably and rotatably penetrated; and a transition hollow formed through an outer periphery surrounding the support hollow in a radial direction and accommodating the transition protrusion, wherein the transition protrusion penetrates the transition hollow and is at least partially exposed to the transition hollow to be coupled to the shaft screw thread, and a bone graft material mixer may be provided.

[0021] At this time, a bone graft material mixer may be provided in which the above transition hollows are provided in multiple numbers and formed at different locations, and the above transition protrusions are provided in multiple numbers and are respectively coupled to the plurality of the above transition hollows and are coupled to the shaft screw threads at different locations.

[0022] In addition, a bone graft material mixer may be provided in which the housing includes a syringe coupling portion positioned at one end of the one direction, coupled with the syringe, and having a syringe receiving space formed therein that communicates with the housing hollow space, and the piston coupling portion is positioned in the syringe receiving space and coupled with a shaft coupling member provided in the syringe.

[0023] At this time, a bone graft material mixer may be provided, wherein the piston coupling part includes a piston receiving part formed inside thereof, which is a space for receiving the shaft coupling member; and a piston insertion opening formed recessed in an outer periphery surrounding the piston receiving part, which connects the outside and the piston receiving part to form a passage through which a piston body coupled to the shaft coupling member passes.

[0024] In addition, a bone graft material mixer may be provided in which the shaft coupling member accommodated in the piston receiving portion is supported by the inner circumference of the piston coupling portion surrounding the piston receiving portion, and moves and rotates together with the piston coupling portion.

[0025] At this time, a bone graft material mixer may be provided in which the syringe coupling portion is formed through an outer periphery surrounding the syringe receiving space to communicate with the outside of the syringe receiving space and includes a syringe penetration opening into which a syringe wing provided in the syringe is inserted.

[0026] In addition, a bone graft material mixer may be provided in which the syringe wing inserted into the syringe penetration opening is supported by the inner circumference of the syringe coupling portion surrounding the syringe penetration opening and prevented from rotating.

[0027] At this time, a bone graft material mixer may be provided in which the switching member includes a shaft support member that movably and rotatably supports the shaft body; and a rotation prevention member that is configured to contact the shaft support member and prevent rotation of the shaft support member.

[0028] In addition, a bone graft material mixer may be provided in which the shaft support member includes a support protrusion having a sawtooth shape that extends along an outer periphery of one side in the longitudinal direction and includes a portion inclined in one of a clockwise and a counterclockwise direction, and the rotation prevention member includes a support protrusion that protrudes toward the shaft support member and is configured to contact the support protrusion to prevent rotation of the shaft support member in one of the directions.

[0029] At this time, a bone graft material mixer may be provided in which the end of the support protrusion extends obliquely in one of the directions.

[0030] In addition, a bone graft material mixer may be provided, which includes a handle portion that is coupled to the shaft on the outside of the housing and receives an external force in the longitudinal direction, and the shaft includes a handle coupling portion that is located at the other end of the shaft body in the extension direction and is exposed to the outside of the housing and coupled to the handle portion.

[0031] According to the above configuration, the bone graft material mixer according to the embodiment of the present invention can prevent contamination of the manufactured bone graft material.

[0032] In addition, according to the above configuration, the bone graft material mixer according to the embodiment of the present invention can easily perform the process of manufacturing the bone graft material.

[0033] In addition, according to the above configuration, the bone graft material mixer according to the embodiment of the present invention may prevent the bone graft material from being exposed to the outside during the manufacturing and injection process.

[0034] In addition, according to the above configuration, the bone graft material mixer according to the embodiment of the present invention can intuitively understand the method of mixing the bone graft material.

[0035] The effects of the present invention are not limited to the effects described above, and should be understood to include all effects that can be inferred from the detailed description of the present invention or the composition of the invention described in the claims.

[0036] FIG. 1 is a perspective view illustrating a bone graft material mixer according to an embodiment of the present invention.

[0037] Figure 2 is a side view illustrating the bone graft material mixer of Figure 1.

[0038] Fig. 3 is an exploded perspective view showing the configuration of the bone graft material mixer of Fig. 1.

[0039] Fig. 4 is a perspective view showing a housing provided in the bone graft material mixer of Fig. 1.

[0040] Figure 5 is a front view (a) and a back view (b) showing the housing of Figure 4.

[0041] Figure 6 is a cross-sectional view taken along line AA of the housing of Figure 4.

[0042] Figure 7 is an enlarged view of part A showing the housing of Figure 4.

[0043] Fig. 8 is an exploded perspective view showing the joint relationship of the shaft, switching member, and handle provided in the bone graft material mixer of Fig. 1.

[0044] Figure 9 is a plan view (a) and a bottom view (b) showing the shaft of Figure 8.

[0045] Fig. 10 is a front view showing the shaft of Fig. 8.

[0046] Fig. 11 is a BB cross-sectional view showing the shaft of Fig. 8.

[0047] Fig. 12 is an exploded perspective view showing the configuration of the switching member of Fig. 8.

[0048] Fig. 13 is a CC cross-sectional view showing the switching member of Fig. 8.

[0049] Fig. 14 is a front view (a) and a DD cross-sectional view (b) showing the switching member of Fig. 8.

[0050] Fig. 15 is an exploded perspective view showing the configuration of the handle of Fig. 8.

[0051] Fig. 16 is a CC cross-sectional view showing the handle portion of Fig. 15.

[0052] Fig. 17 is a cross-sectional view illustrating the bone graft material mixer of Fig. 1.

[0053] Fig. 18 is a side cross-sectional view illustrating the bone graft material mixer of Fig. 1.

[0054] FIG. 19 is a perspective view illustrating a bone graft material mixer according to another embodiment of the present invention.

[0055] Fig. 20 is an exploded perspective view showing the configuration of the bone graft material mixer of Fig. 19.

[0056] Fig. 21 is an exploded perspective view showing the configuration of a housing provided in the bone graft material mixer of Fig. 19.

[0057] Fig. 22 is a GG cross-sectional view showing the housing of Fig. 21.

[0058] Figures 23 to 27 are diagrams showing the state of use of the bone graft material mixer of Figure 1 in operation in combination with a mixer.

[0059] Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings so that those skilled in the art can easily practice the present invention. The present invention may be implemented in various different forms and is not limited to the embodiments described herein. To clearly explain the present invention, parts irrelevant to the description are omitted in the drawings, and the same reference numerals designate identical or similar components throughout the specification.

[0060] The words and terms used in this specification and claims should not be construed as limited to their ordinary or dictionary meanings, but should be interpreted in a way that is consistent with the technical idea of ​​the present invention, in accordance with the principles by which the inventor can define terms and concepts in order to best explain his or her invention.

[0061] Therefore, the embodiments described in this specification and the configurations illustrated in the drawings correspond to a preferred embodiment of the present invention, and do not represent all of the technical ideas of the present invention, so there may be various equivalents and modified examples that can replace the configuration at the time of filing of the present invention.

[0062] In the following description, descriptions of some components may be omitted to clarify the features of the present invention.

[0063]

[0064] The term "fluid communication" as used herein refers to one or more elements being fluidly connected to one another. In one embodiment, the fluid communication may be formed by elements such as conduits, pipes, or piping. In the following description, the fluid communication may be used in the same sense as one or more elements being "fluidly connected" to one another.

[0065] The term "fluid" used in the following description refers to any form of material that can flow and change shape or volume, etc., due to an external force. In one embodiment, the fluid may be a liquid such as water or a gas such as air.

[0066] The terms “upper side,” “lower side,” “left side,” “right side,” “front side,” and “rear side” used in the following description are to be understood with reference to the coordinate system depicted throughout the attached drawings.

[0067]

[0068] Referring to FIGS. 1 to 3, a bone graft material mixer (10) according to an embodiment of the present invention is illustrated. The bone graft material mixer (10) according to the present embodiment is coupled to a syringe (1000) and can mix bone graft material contained within the syringe (1000).

[0069] The bone graft material, once mixed, can be directly provided to the patient from a syringe (1000) separated from the bone graft material mixer (10) without a separate process of external discharge. Accordingly, the bone graft material is minimized from being exposed to the outside during the mixing and injection process, thereby preventing contamination of the bone graft material.

[0070] In one embodiment, the bone graft material mixer (10) may be provided separately from and combined with the syringe (1000). In another embodiment, the bone graft material mixer (10) may be provided and used together with the syringe (1000).

[0071] In any case, the bone graft material mixer (10) can be detachably coupled to the syringe (1000). In addition, the bone graft material mixer (10) can be coupled to a part of the syringe (1000) (i.e., the piston (1300) to be described later) to mix the bone graft material contained within the syringe (1000).

[0072] In the illustrated embodiment, the bone graft mixer (10) includes a housing (100), a shaft (200), a switching member (300), and a handle (400).

[0073] The housing (100) is coupled to and supports other components of the bone graft mixer (10). In addition, the housing (100) at least partially accommodates a syringe (1000). The housing (100) is the portion where the bone graft mixer (10) is coupled to the syringe (1000).

[0074] The housing (100) is coupled to the shaft (200). The housing (100) can support the shaft (200) so as to be movable in its longitudinal direction, in the illustrated embodiment, in the forward and backward direction. At the same time, the housing (100) can rotatably support the shaft (200). The housing (100) can at least partially accommodate the shaft (200).

[0075] The housing (100) is coupled to a switching member (300). The switching member (300) is configured to convert the linear movement of the shaft (200) coupled to the housing (100) into rotational movement. The shaft (200) and the switching member (300) can be coupled to each other while being coupled to the housing (100).

[0076] The housing (100) is positioned adjacent to the handle (400). As will be described later, the handle (400) is coupled to the shaft (200) and is exposed to the outside of the housing (100).

[0077] A space is formed inside the housing (100). This space is communicated with a space formed inside the syringe (1000). A shaft (200) coupled to the housing (100) can be connected to a piston (1300) extending from the space formed inside the syringe (1000) through this space.

[0078] The housing (100) is coupled with the shaft (200) and the switching member (300), supports the shaft (200) movably and rotatably, and may have any shape that can be coupled with the syringe (1000). In the illustrated embodiment, the housing (100) has a polygonal prism shape that has a predetermined cross-section and extends in the front-rear direction.

[0079] In the embodiments illustrated in FIGS. 4 to 7, the housing (100) includes a housing body (110), a housing cavity (120), a syringe coupling portion (130), and a switching member coupling portion (140).

[0080] The housing body (110) constitutes the outer shape of the housing (100). Other components of the housing (100) can be combined, formed, or arranged in the housing body (110).

[0081] A housing cavity (120) is formed inside the housing body (110). The housing body (110) can surround a shaft (200) accommodated in the housing cavity (120) in a radial direction.

[0082] The housing body (110) is coupled with a syringe coupling portion (130). The syringe coupling portion (130) is positioned on one side of the housing body (110) in the longitudinal direction, the front side in the illustrated embodiment.

[0083] The housing body (110) is coupled with a switching member coupling portion (140). The switching member coupling portion (140) is positioned on the other side of the housing body (110) in the longitudinal direction, i.e., on the rear side in the illustrated embodiment.

[0084] The housing body (110) has a shape corresponding to the shape of the housing (100), i.e., it extends long in the front-rear direction in the illustrated embodiment. At this time, the cross-section of the housing body (110) may be formed in a ring shape with a housing hollow (120) formed inside.

[0085] The housing hollow (120) is a space formed inside the housing body (110). The housing hollow (120) extends in the extension direction of the housing body (110), in the front-back direction in the illustrated embodiment. One end of the housing hollow (120) in the extension direction, the front side in the illustrated embodiment, is formed open and communicates with the syringe receiving space (131). The other end of the housing hollow (120) in the extension direction, the rear side in the illustrated embodiment, is formed open and communicates with the switching member receiving space (141, 142).

[0086] The housing hollow body (120) accommodates the shaft (200) so as to be movable and rotatable. The shaft (200) can rotate in either a clockwise or counterclockwise direction while accommodated in the housing hollow body (120), and can move in either a direction toward or opposite to the syringe coupling portion (130).

[0087] The housing hollow (120) may have a shape corresponding to the shape of the housing body (110). In the illustrated embodiment, the housing hollow (120) is formed as a cylindrical space having a circular cross-section and a length in the front-back direction.

[0088] The syringe coupling portion (130) is a portion where the housing (100) is coupled to the syringe (1000). The syringe coupling portion (130) partially accommodates the syringe (1000). The shaft (200) can be coupled to the syringe (1000) through the syringe coupling portion (130). The syringe coupling portion (130) can partially surround the syringe (1000).

[0089] The syringe coupling portion (130) is coupled with the housing body (110). In one embodiment, the syringe coupling portion (130) may be formed integrally with the housing body (110). The syringe coupling portion (130) is positioned on one side of the housing body (110) in the longitudinal direction, that is, on the front side in the illustrated embodiment. The syringe coupling portion (130) is positioned opposite the switching member coupling portion (140).

[0090] The syringe coupling portion (130) may be of any shape that can be coupled with and accommodate the syringe (1000). In the illustrated embodiment, the syringe coupling portion (130) is formed with a hollow portion inside that is open on each longitudinal side, i.e., the front side and the rear side, and is formed to at least partially surround the hollow portion in the radial direction.

[0091] At this time, the syringe coupling portion (130) can be formed to have a larger cross-sectional area than the housing body (110). Accordingly, the syringe (1000) can be easily coupled to the syringe coupling portion (130).

[0092] In the illustrated embodiment, the syringe coupling portion (130) includes a syringe receiving space (131), a syringe penetration opening (132), and a syringe confirmation opening (133).

[0093] The syringe receiving space (131) is defined as a portion of the space formed inside the syringe coupling portion (130). The syringe receiving space (131) receives a syringe (1000). The syringe body (1100) and the shaft coupling member (1330) provided in the syringe (1000) can be received in the syringe receiving space (131). In addition, the piston coupling portion (240) provided in the shaft (200) can be located in the syringe receiving space (131).

[0094] At this time, the syringe receiving space (131) can accommodate the piston coupling part (240) in a movable and rotatable manner. In addition, the syringe receiving space (131) can accommodate the piston (1300) in a movable and rotatable manner.

[0095] The syringe receiving space (131) is partially surrounded by the syringe coupling portion (130). In the illustrated embodiment, the radial direction of the syringe receiving space (131), i.e., the upper side, the lower side, the left side, and the right side, are surrounded by the syringe coupling portion (130). The syringe receiving space (131) may have a shape corresponding to the shape of the syringe coupling portion (130). In the illustrated embodiment, the syringe receiving space (131) is formed as a space having a polygonal cross-section and a length in the front-back direction.

[0096] One longitudinal side of the syringe receiving space (131), the front side in the illustrated embodiment, is formed as open. A syringe (1000) can be positioned in the syringe receiving space (131) through the one side. The other longitudinal side of the syringe receiving space (131), the rear side in the illustrated embodiment, is formed as open and communicates with the housing hollow (120). The shaft (200) can extend to the syringe receiving space (131) through the other side.

[0097] The syringe penetration opening (132) is defined as a portion of a groove formed through the syringe coupling portion (130). The syringe penetration opening (132) forms a passage for the piston (1300) provided in the syringe (1000) to enter the syringe receiving space (131).

[0098] As will be described later, the piston (1300) can be coupled with a piston coupling portion (240) accommodated in a syringe receiving space (131) by passing through a syringe through opening (132). The syringe through opening (132) communicates with the syringe receiving space (131) and the outside.

[0099] The syringe penetration opening (132) may be formed in any shape that can constitute a passage for the piston (1300) to enter the syringe receiving space (131). In the illustrated embodiment, the syringe penetration opening (132) is defined as an opening having a length in the longitudinal direction of the housing body (110), that is, a front-back direction, a height in the vertical direction, and a thickness in the left-right direction. At this time, the cross-section of the syringe penetration opening (132) may be formed to be larger than the cross-section of the shaft coupling member (1330) of the piston (1300).

[0100] A plurality of syringe penetration openings (132) may be formed. The plurality of syringe penetration openings (132) may communicate with the syringe receiving space (131) and the outside at different locations. In the illustrated embodiment, a pair of syringe penetration openings (132) are provided and are respectively arranged on the left and right sides of the syringe coupling portion (130). The pair of syringe penetration openings (132) are arranged to face each other with the syringe receiving space (131) interposed therebetween.

[0101] The syringe confirmation opening (133) functions as an inspection window for checking the status of the syringe (1000) accommodated in the syringe receiving space (131). The syringe confirmation opening (133) is formed penetrating a portion of the syringe coupling portion (130) surrounding the syringe receiving space (131). The syringe confirmation opening (133) is connected to the syringe receiving space (131).

[0102] A plurality of syringe confirmation openings (133) may be formed. The plurality of syringe confirmation openings (133) may communicate with the outside and the syringe receiving space (131) at different locations. At this time, the plurality of syringe confirmation openings (133) may be arranged at different locations from the plurality of syringe penetration openings (132).

[0103] In the illustrated embodiment, a pair of syringe confirmation openings (133) are provided and formed in the height direction of the syringe coupling portion (130), i.e., in the upper and lower portions, respectively. The pair of syringe confirmation openings (133) are arranged facing each other with a syringe receiving space (131) therebetween.

[0104] The switching member coupling portion (140) is a portion where the housing (100) is coupled to the switching member (300). The switching member coupling portion (140) can accommodate and support the switching member (300). The switching member (300) can support the shaft (200) while coupled to the switching member coupling portion (140).

[0105] The switching member coupling portion (140) is coupled with the housing body (110). In one embodiment, the switching member coupling portion (140) may be formed integrally with the housing body (110). The switching member coupling portion (140) is located on the other longitudinal side of the housing body (110), in the illustrated embodiment, on the rear side. The switching member coupling portion (140) is located opposite the syringe coupling portion (130).

[0106] The switching member coupling portion (140) may have any shape that can be coupled with and support the switching member (300). In the illustrated embodiment, the switching member coupling portion (140) is formed such that its cross-sectional area changes along the longitudinal direction. Specifically, the switching member coupling portion (140) has a three-dimensional shape whose cross-sectional area increases in the direction opposite to the syringe coupling portion (130), i.e., toward the rear side.

[0107] Accordingly, the worker can easily grip the housing (100) using the switching member joint (140).

[0108] In the illustrated embodiment, the switching member coupling portion (140) includes a first switching member receiving space (141), a second switching member receiving space (142), a third switching member receiving space (143), a fourth switching member receiving space (144), a pin insertion portion (145), and a rotation prevention member receiving portion (146).

[0109] The first switching member receiving space (141) receives the shaft body (210) of the shaft (200) coupled with the housing (100). The shaft body (210) can be movably and rotatably received in the first switching member receiving space (141). The first switching member receiving space (141) can have a shape corresponding to the shape of the shaft body (210). In the illustrated embodiment, the first switching member receiving space (141) is formed as a cylindrical space having a circular cross-section and a length in the front-rear direction.

[0110] At this time, the diameter of the cross-section of the first switching member receiving space (141) may be the same as the diameter of the cross-section of the shaft body (210). Accordingly, the shaft (200) received in the first switching member receiving space (141) can be stably supported without swinging in the radial direction.

[0111] In the above embodiment, the diameter of the cross-section of the first switching member receiving space (141) can be formed smaller than the diameter of the cross-section of the housing hollow (120) and the second to fourth switching member receiving spaces (142, 143, 144).

[0112] One longitudinal side of the first switching member receiving space (141), the front side in the illustrated embodiment, is formed open and communicates with the housing cavity (120). The other longitudinal side of the first switching member receiving space (141), the rear side in the illustrated embodiment, is formed open and communicates with the second switching member receiving space (142).

[0113] The second switching member receiving space (142) receives a portion of the shaft support member (310) of the switching member (300), i.e., the front side in the illustrated embodiment. The shaft support member (310) can be received and supported in the second switching member receiving space (142) while the shaft body (210) is penetrated therethrough.

[0114] The second switching member receiving space (142) may have a shape corresponding to the shape of the above-described part of the shaft support member (310). In the illustrated embodiment, the second switching member receiving space (142) is formed as a cylindrical space having a circular cross-section and a length in the front-back direction.

[0115] At this time, the diameter of the cross-section of the second switching member receiving space (142) may be the same as the diameter of the cross-section of the above-mentioned part of the shaft support member (310). Accordingly, the shaft support member (310) received in the second switching member receiving space (142) can be stably supported without swinging in the radial direction.

[0116] In the above embodiment, the diameter of the cross-section of the second switching member receiving space (142) may be formed to be greater than or equal to the diameter of the cross-section of the first switching member receiving space (141), but less than or equal to the diameter of the cross-section of the housing hollow (120) and the third to fourth switching member receiving spaces (143, 144).

[0117] One longitudinal side of the second switching member receiving space (142), the front side in the illustrated embodiment, is formed open and communicates with the first switching member receiving space (141). The other longitudinal side of the second switching member receiving space (142), the rear side in the illustrated embodiment, is formed open and communicates with the third switching member receiving space (143).

[0118] The third switching member receiving space (143) receives another portion of the shaft support member (310) of the switching member (300), i.e., the rear side in the illustrated embodiment. The shaft support member (310) can be received and supported in the third switching member receiving space (143) while the shaft body (210) is penetrated therethrough.

[0119] The third transition member receiving space (143) may have a shape corresponding to the shape of the other part of the shaft support member (310). In the illustrated embodiment, the third transition member receiving space (143) is formed as a cylindrical space having a circular cross-section and a length in the front-back direction.

[0120] At this time, the diameter of the cross-section of the third switching member receiving space (143) may be the same as the diameter of the cross-section of the other part of the shaft support member (310). Accordingly, the shaft support member (310) received in the third switching member receiving space (143) can be stably supported without swinging in the radial direction.

[0121] In the above embodiment, the diameter of the cross-section of the third switching member receiving space (143) may be formed to be greater than or equal to the diameter of the cross-sections of the first to second switching member receiving spaces (141, 142), but less than or equal to the diameter of the cross-sections of the housing hollow (120) and the fourth switching member receiving space (144).

[0122] One longitudinal side of the third switching member receiving space (143), the front side in the illustrated embodiment, is formed open and communicates with the second switching member receiving space (142). The other longitudinal side of the third switching member receiving space (143), the rear side in the illustrated embodiment, is formed open and communicates with the fourth switching member receiving space (144).

[0123] In addition, each side in the radial direction of the third switching member receiving space (143), the upper and lower sides in the illustrated embodiment, are formed open and communicate with the rotation prevention member receiving portion (146). The rotation prevention member (330) received in the rotation prevention member receiving portion (146) can be combined with the support protrusion (313) of the shaft support member (310) received in the third switching member receiving space (143).

[0124] The fourth switching member receiving space (144) receives the washer member (350) of the switching member (300). The washer member (350) can be received and supported in the fourth switching member receiving space (144) while the shaft body (210) is penetrated therethrough.

[0125] The fourth switching member receiving space (144) may have a shape corresponding to the shape of the washer member (350). In the illustrated embodiment, the fourth switching member receiving space (144) is formed as a space in the shape of a disk having a circular cross-section and a thickness in the front-back direction.

[0126] At this time, the diameter of the cross-section of the fourth switching member receiving space (144) may be equal to the outer diameter of the cross-section of the washer member (350). Accordingly, the washer member (350) received in the fourth switching member receiving space (144) can be stably supported without radially swinging.

[0127] In the above embodiment, the diameter of the cross-section of the fourth switching member receiving space (144) can be formed to be larger than the diameter of the cross-section of the housing hollow (120) and the first to third switching member receiving spaces (141, 142, 143).

[0128] One side in the thickness direction of the fourth switching member receiving space (144), the front side in the illustrated embodiment, is formed open and communicates with the third switching member receiving space (143). The other side in the thickness direction of the fourth switching member receiving space (144), the rear side in the illustrated embodiment, is formed open and communicates with the outside. The shaft (200) can be received in the housing hollow space (120) through the other side.

[0129] The pin insertion portion (145) accommodates a fixed pin (340) of a switching member (300). The fixed pin (340) accommodated in the pin insertion portion (145) can restrain a rotation prevention member (330) accommodated in the rotation prevention member accommodation portion (146).

[0130] The pin insertion portion (145) is positioned adjacent to the fourth switching member receiving space (144). At this time, the pin insertion portion (145) is positioned spaced apart from the fourth switching member receiving space (144) in the radial direction. That is, the pin insertion portion (145) is not in communication with the fourth switching member receiving space (144).

[0131] The pin insertion portion (145) can receive a fixed pin (340) in a retractable manner. To this end, the pin insertion portion (145) can be formed in a shape corresponding to the shape of the fixed pin (340). In the illustrated embodiment, the pin insertion portion (145) extends in the front-back direction.

[0132] One longitudinal side of the pin insertion portion (145), in the illustrated embodiment, the front side, is open and communicates with the anti-rotation member receiving portion (146). The fixed pin (340) received in the pin insertion portion (145) can be coupled with the anti-rotation member (330) received in the anti-rotation member receiving portion (146). At this time, the front end of the pin insertion portion (145) can extend to the inner periphery of the switching member coupling portion (140) that surrounds the anti-rotation member receiving portion (146) from the front side.

[0133] The other longitudinal side of the pin insertion portion (145), in the illustrated embodiment, the rear side, is open and communicates with the outside. The fixed pin (340) can be inserted into the pin insertion portion (145) through the other longitudinal side of the pin insertion portion (145).

[0134] The anti-rotation member receiving portion (146) receives the anti-rotation member (330) of the switching member (300). The anti-rotation member (330) received in the anti-rotation member receiving portion (146) can contact the support protrusion (313) of the shaft support member (310) to prevent arbitrary rotation of the shaft support member (310). In addition, the anti-rotation member (330) received in the anti-rotation member receiving portion (146) is restricted from arbitrary movement by a fixing pin (340), and its height can be adjusted.

[0135] The anti-rotation member receiving portion (146) is connected to the third switching member receiving space (143). The anti-rotation member receiving portion (146) is positioned radially outside the third switching member receiving space (143) and extends toward the third switching member receiving space (143). Accordingly, the anti-rotation member (330) can come into contact with the supporting protrusion (313) of the shaft support member (310).

[0136] The anti-rotation member receiving portion (146) is in communication with the pin insertion portion (145). The anti-rotation member receiving portion (146) is located on one side of the longitudinal direction of the pin insertion portion (145), that is, on the front side in the illustrated embodiment, and is in communication with the pin insertion portion (145). The fixed pin (340) inserted into the pin insertion portion (145) can be combined with the anti-rotation member (330).

[0137] The anti-rotation member receiving portion (146) may have any shape that can be communicated with the third switching member receiving space (143) and the pin insertion portion (145), respectively. In the illustrated embodiment, the anti-rotation member receiving portion (146) is formed as a space in which a horizontal cross-section is formed as a polygon and has a height in the vertical direction.

[0138] In the above embodiment, one longitudinal side of the anti-rotation member receiving portion (146), the rear side in the illustrated embodiment, is in communication with the pin insertion portion (145). One height-wise side of the anti-rotation member receiving portion (146) is in communication with the third switching member receiving space (143).

[0139] A plurality of anti-rotation member receiving portions (146) may be formed. The plurality of anti-rotation member receiving portions (146) may be connected to the third switching member receiving space (143) at different locations. In the illustrated embodiment, a pair of anti-rotation member receiving portions (146) are provided and are respectively positioned at the upper and lower sides of the third switching member receiving space (143).

[0140] The shaft (200) transmits an externally applied force to the syringe (1000). By moving or rotating the shaft (200), the bone graft material contained in the syringe (1000) can be mixed.

[0141] The shaft (200) is coupled to the housing (100). The shaft (200) can be movably and rotatably coupled to the housing (100). The shaft (200) can be at least partially accommodated in the housing cavity (120).

[0142] The shaft (200) is coupled to a switching member (300). A linear force applied to the shaft (200) can be at least partially converted into a rotational force by the switching member (300). Accordingly, the shaft (200) can rotate while moving linearly.

[0143] The shaft (200) is coupled to the handle (400). The shaft (200) can receive a linear external force applied to the handle (400). The linear external force transmitted to the shaft (200) can be converted into a rotational force of the shaft (200) by the conversion member (300).

[0144] The shaft (200) is coupled to the syringe (1000). Specifically, the shaft (200) is coupled to the shaft coupling member (1330) of the piston (1300). When the shaft (200) moves or rotates in the longitudinal direction, the piston (1300) coupled thereto can also move or rotate in the longitudinal direction. Accordingly, the bone graft material contained in the syringe (1000) can be mixed.

[0145] In the embodiments illustrated in FIGS. 8 to 11, the shaft (200) includes a shaft body (210), a handle coupling portion (220), a shaft thread (230), and a piston coupling portion (240).

[0146] The shaft body (210) constitutes the body of the shaft (200). The shaft body (210) is a portion where the shaft (200) is coupled to the housing (100). The shaft body (210) penetrates the housing hollow space (120) and the first to fourth switching member receiving spaces (141, 142, 143, 144). The shaft body (210) can be movably and rotatably supported by the inner circumferential surface of the switching member connecting portion (140) surrounding the first switching member receiving space (141).

[0147] The shaft body (210) may have a shape corresponding to the shape of the housing body (110). In the illustrated embodiment, the shaft body (210) has a circular cross-section and is a bar shape having a length in the front-rear direction.

[0148] The shaft body (210) is coupled to a handle coupling portion (220). One longitudinal side of the shaft body (210), the rear side in the illustrated embodiment, is continuous with the handle coupling portion (220). In one embodiment, the shaft body (210) and the handle coupling portion (220) may be formed integrally.

[0149] A shaft screw thread (230) is formed on the shaft body (210). On the outer periphery of the shaft body (210), the shaft screw thread (230) is formed to extend in the extension direction of the shaft body (210), i.e., in the front-back direction in the illustrated embodiment.

[0150] The shaft body (210) is coupled to the piston coupling portion (240). The other longitudinal side of the shaft body (210), in the illustrated embodiment, the front side, is coupled to the piston coupling portion (240). In one embodiment, the shaft body (210) may be formed integrally with the piston coupling portion (240).

[0151] The shaft body (210) may be positioned at least partially inside the housing (100). At this time, the shaft body (210) may be coupled to the housing (100) so as to be movable in its longitudinal direction, in the illustrated embodiment, in the forward and backward direction.

[0152] In the illustrated embodiment, a shaft hollow (211) is formed inside the shaft body (210).

[0153] The shaft hollow (211) is a space formed inside the shaft body (210). The shaft hollow (211) extends in the longitudinal direction of the shaft body (210), in the front-back direction in the illustrated embodiment. One end of the shaft hollow (211) in the extension direction, in the illustrated embodiment, the front end, is formed open and communicates with the piston receiving portion (242).

[0154] As the shaft hollow body (211) is formed, the shaft body (210) can be made lighter and its longitudinal rigidity can be reinforced.

[0155] The handle coupling portion (220) is a portion where the shaft (200) is coupled to the handle (400). An external force applied to the handle (400) can be transmitted to the shaft (200) by the handle coupling portion (220).

[0156] The handle coupling portion (220) is coupled to the shaft body (210). The handle coupling portion (220) is located on one side of the shaft body (210) in the longitudinal direction, i.e., the rear side. The handle coupling portion (220) may be exposed on the outside of the housing (100).

[0157] The handle coupling portion (220) can be coupled to the handle (400) in any form that can transmit an external force applied to the handle (400). In the illustrated embodiment, the handle coupling portion (220) is formed in a bar shape with a circular cross-section similar to the shaft body (210) and a length in the front-back direction.

[0158] In the above embodiment, the handle coupling portion (220) can be inserted and coupled into the handle hollow portion (411) provided in the handle (400). In order to prevent the handle coupling portion (220) or the handle (400) from being misused, the handle coupling portion (220) can be provided with a component, such as an adhesive, for fixing it to the handle hollow portion (411).

[0159] The shaft thread (230) is the portion where the shaft (200) is coupled with the switching projection (320) of the switching member (300). The linear movement of the shaft (200) can be at least partially converted into rotation by the coupling of the shaft thread (230) and the switching projection (320).

[0160] The shaft thread (230) is formed on the outer periphery of the shaft body (210). The shaft thread (230) extends in a helical shape along the shaft body (210) in the longitudinal direction, i.e., in the front-back direction in the illustrated embodiment.

[0161] The shaft thread (230) may be of any shape that can be combined with the transition projection (320) to convert longitudinal movement into rotation. In the illustrated embodiment, the shaft thread (230) is provided in a concave shape that is recessed into the outer surface of the shaft body (210) to movably accommodate the transition projection (320). The shaft (200) can be moved longitudinally and rotated simultaneously with the transition projection (320) accommodated in the shaft thread (230).

[0162] The piston coupling portion (240) is the portion where the shaft (200) is coupled to the syringe (1000). The piston coupling portion (240) is coupled to and supports the shaft coupling member (1330) provided in the syringe (1000). The movement and rotation of the shaft (200) can be transmitted to the piston (1300) by the piston coupling portion (240). Accordingly, the piston (1300) can move and rotate together with the shaft (200) to mix the bone graft material.

[0163] The piston coupling part (240) is coupled with the shaft body (210). The piston coupling part (240) is located on the other side of the shaft body (210) in the longitudinal direction, i.e., the front side. The piston coupling part (240) is located in the syringe receiving space (131).

[0164] The piston coupling portion (240) may have any shape that can be coupled with and support the shaft coupling member (1330). At this time, the piston coupling portion (240) is formed to have a cross-sectional area larger than the cross-sectional area of ​​the shaft body (210), so that it can stably support the shaft coupling member (1330).

[0165] Therefore, it is preferable that the piston coupling portion (240) be provided so as to be separable from the shaft body (210) and be coupled to the front end of the shaft body (210) inserted into the housing hollow (120).

[0166] The piston coupling part (240) is located in the syringe receiving space (131). The piston coupling part (240) can be movably and rotatably received in the syringe receiving space (131).

[0167] In the illustrated embodiment, the piston coupling portion (240) includes a piston insertion opening (241) and a piston receiving portion (242).

[0168] The piston insertion opening (241) is defined as an opening formed on the outer periphery of the piston coupling portion (240). The piston insertion opening (241) is a space into which the piston body (1310) of the piston (1300) is inserted. The piston insertion opening (241) is communicated with the piston receiving portion (242), so that the piston body (1310) and the shaft coupling member (1330) coupled thereto can be received in the piston receiving portion (242) through the piston insertion opening (241).

[0169] The piston insertion opening (241) may be formed on one side of the outer circumference of the piston coupling portion (240). As best illustrated in FIG. 10, the piston insertion opening (241) is formed recessed in the lower outer circumference of the front of the piston coupling portion (240).

[0170] The piston insertion opening (241) can be formed in any shape that can constitute a passage through which the piston body (1310) enters the piston receiving portion (242). In the illustrated embodiment, the piston insertion opening (241) is open on one side in the height direction, the upper side in the illustrated embodiment, to communicate with the piston receiving portion (242), and on the other side in the height direction, the lower side in the illustrated embodiment, to communicate with the outside.

[0171] The piston receiving portion (242) receives the piston (1300). The piston receiving portion (242) is defined by being at least partially surrounded by the inner circumference of the piston coupling portion (240). The shaft coupling member (1330) received in the piston receiving portion (242) is supported on the inner circumference of the piston coupling portion (240) surrounding the piston receiving portion (242), and can move and rotate together with the piston coupling portion (240).

[0172] The piston receiving portion (242) may have a shape corresponding to the shape of the shaft coupling member (1330). In the illustrated embodiment, the piston receiving portion (242) has a polygonal cross-section and is formed as a space having a height in the vertical direction.

[0173] Each side in the height direction of the piston receiving portion (242), the upper side and the lower side in the illustrated embodiment, are formed as open. Each side in the horizontal direction of the piston receiving portion (242), the front side, the rear side, the left side, and the right side in the illustrated embodiment, are surrounded by the piston coupling portion (240). At this time, one side of the piston receiving portion (242), the front side in the illustrated embodiment, is connected to the outside by a piston insertion opening (241).

[0174] The conversion member (300) converts at least a portion of the linear external force applied to the shaft (200) into rotational force. The shaft (200) coupled with the conversion member (300) can be rotated while simultaneously moving in the linear direction by the external force. Accordingly, the piston (1300) coupled with the shaft (200) can also simultaneously move and rotate in the linear direction, thereby mixing the bone graft material.

[0175] The switching member (300) is coupled with the housing (100). The switching member (300) is each accommodated in a plurality of switching member accommodation spaces (142, 143, 144), a pin insertion portion (145), and a rotation prevention member accommodation portion (146) formed in the switching member coupling portion (140).

[0176] The transition member (300) is coupled to the shaft (200). As described above, the transition member (300) is at least partially received in the shaft threads (230). As the shaft (200) moves, some components of the transition member (300) may be configured to move along the shaft threads (230) and rotate the shaft (200).

[0177] In the embodiments illustrated in FIGS. 12 to 14, the switching member (300) includes a shaft support member (310), a switching projection (320), an anti-rotation member (330), a fixing pin (340), and a washer member (350).

[0178] The shaft support member (310) is coupled to the shaft (200) to support the shaft (200). A hollow space (i.e., a support hollow space (311) to be described later) is formed inside the shaft support member (310), through which the shaft body (210) can pass. The shaft support member (310) can support the shaft (200) so that it can move in the longitudinal direction and simultaneously rotate.

[0179] The shaft support member (310) is coupled with the switching member coupling portion (140). Specifically, the shaft support member (310) is partially accommodated in the second switching member receiving space (142) and the third switching member receiving space (143) communicating therewith. The shaft support member (310) can be supported by the inner periphery of the switching member coupling portion (140) surrounding the second and third switching member receiving spaces (142, 143).

[0180] The shaft support member (310) is coupled with a transition protrusion (320). In the illustrated embodiment, the transition protrusion (320) is coupled in a radial direction of the shaft support member (310) so that it can be at least partially exposed to a hollow formed therein.

[0181] The shaft support member (310) is coupled to the anti-rotation member (330). The support protrusion (313) formed on the outer periphery of the shaft support member (310) can come into contact with the anti-rotation member (330). Accordingly, the rotation of the shaft support member (310) can be permitted or restricted.

[0182] The shaft support member (310) may have any shape that can movably and rotatably support the shaft body (210). In the illustrated embodiment, the shaft support member (310) has a three-dimensional shape with a circular cross-section having a hollow formed therein and a height in the front-back direction.

[0183] At this time, the outer diameter of the cross-section of one side in the longitudinal direction of the shaft support member (310), the front side portion in the illustrated embodiment, may be formed smaller than the outer diameter of the cross-section of the other side, the rear side portion in the illustrated embodiment. The one side of the shaft support member (310) is accommodated in the second switching member accommodation space (142), and the other side of the shaft support member (310) is accommodated in the third switching member accommodation space (143).

[0184] In the illustrated embodiment, the shaft support member (310) includes a support hollow (311), a transition hollow (312), and a support protrusion (313).

[0185] The support cavity (311) is a space formed inside the shaft support member (310). The support cavity (311) extends in the longitudinal direction of the shaft support member (310), i.e., in the front-rear direction in the illustrated embodiment. The shaft body (210) is accommodated in the support cavity (311) so as to be able to move and rotate.

[0186] One longitudinal side of the support hollow (311), in the illustrated embodiment, the front side, is formed open and communicates with the outside. The above-mentioned one side of the support hollow (311) is communicated with the housing hollow (120).

[0187] The other side of the longitudinal direction of the support hollow (311), the rear side in the illustrated embodiment, is formed open and communicates with the outside. The other side of the support hollow (311) can be communicated with the hollow formed inside the washer member (350) to form a passage through which the shaft body (210) is introduced.

[0188] The support hollow (311) may have any shape that can accommodate the shaft body (210) in a movable and rotatably manner. In the illustrated embodiment, the support hollow (311) is formed as a cylindrical space having a circular cross-section and a height in the front-back direction.

[0189] The support hollow (311) is radially connected to the outside by a transition hollow (312). A transition projection (320) inserted into the transition hollow (312) is at least partially exposed in the support hollow (311). A shaft screw thread (230) formed on the outer periphery of the shaft body (210) penetrating the support hollow (311) can be movably coupled with the transition projection (320).

[0190] The transition cavity (312) is a space that accommodates the transition protrusion (320). The transition cavity (312) is formed penetrating the outer periphery of the shaft support member (310) that surrounds the support cavity (311) in a radial direction. The transition cavity (312) connects the support cavity (311) to the outside along the radial direction. The transition cavity (312) can be formed on one side of the shaft support member (310), i.e., a portion formed to have a cross-section with a relatively short outer diameter.

[0191] A plurality of transition hollows (312) may be formed. The plurality of transition hollows (312) may be formed at different locations to accommodate a plurality of transition protrusions (320), respectively. In the illustrated embodiment, a pair of transition hollows (312) are provided to accommodate a pair of transition protrusions (320), respectively. The pair of transition hollows (312) are spaced apart from each other in the width direction of the shaft support member (310), i.e., in the left-right direction in the illustrated embodiment.

[0192] The transition cavity (312) can accommodate the transition protrusion (320) such that the transition protrusion (320) is at least partially exposed to the support cavity (311). As best illustrated in FIG. 13, the transition cavity (312) is formed such that the diameter of the radially outer portion relative to the center of the support cavity (311) is longer than the diameter of the radially inner portion. Accordingly, the side surfaces of the transition cavity (312) can be formed to be inclined along the radial direction.

[0193] The shape, number and arrangement of the transition hollow (312) can be changed corresponding to the shape and number of the transition protrusion (320) and the shape and position of the shaft screw thread (230).

[0194] The supporting protrusion (313) is a portion where the shaft supporting member (310) is coupled to the anti-rotation member (330). The supporting protrusion (313) is formed on the outer periphery of a portion having a relatively large diameter cross-section located on the other side, i.e., the rear side, of the shaft supporting member (310). The supporting protrusion (313) extends along the outer periphery of the other side of the shaft supporting member (310).

[0195] The supporting protrusion (313) may be formed to be inclined toward one side of the outer circumference. As best illustrated in FIG. 13, the supporting protrusion (1313) is formed to be inclined in a clockwise direction. In the above embodiment, the supporting protrusion (313) may be formed in the shape of a sawtooth.

[0196] The support protrusion (313) can be combined with the support projection (333) provided on the rotation prevention member (330). At this time, depending on the shape of the support protrusion (313), the shaft support member (310) can be rotated in a preset direction, but rotation in other directions can be restricted.

[0197] Specifically, the shaft support member (310) may be allowed to rotate in the direction in which the support protrusions (313) are inclined, i.e., in the clockwise direction in the embodiment illustrated in FIG. 13. On the other hand, the shaft support member (310) may be restricted from rotating in the direction in which the support protrusions (313) are vertical, i.e., in the counterclockwise direction in the embodiment illustrated in FIG. 13.

[0198] In the above embodiment, when the shaft support member (310) rotates, a predetermined sound and impact may be generated due to the contact state between the support protrusion (313) and the support protrusion (333). Accordingly, the operator can easily recognize that the shaft support member (310) is rotating.

[0199] The transition protrusion (320) is a portion where the transition member (300) is coupled with the shaft screw thread (230). The linear movement of the shaft (200) can be at least partially converted into rotation by the coupling of the transition protrusion (320) and the shaft screw thread (230). That is, the transition protrusion (320) substantially performs the role of converting the linear movement of the shaft (200) into rotation.

[0200] The transition protrusion (320) is coupled with the shaft thread (230). The transition protrusion (320) is movably received in the shaft thread (230) which is formed in a negative shape. The shaft (200) to which a linear force is applied can be rotated so that the transition protrusion (320) moves along the shaft thread (230).

[0201] The switching projection (320) is coupled with the shaft support member (310). Specifically, the switching projection (320) penetrates the switching hollow (312) and is at least partially exposed to the support hollow (311). The portion of the switching projection (320) exposed to the support hollow (311) can be inserted into the shaft screw thread (230) formed on the outer periphery of the shaft body (210) that penetrates the support hollow (311). The switching projection (320) is accommodated in the second switching member accommodation space (142) together with the shaft support member (310).

[0202] The transition protrusion (320) may be formed in any shape that penetrates the transition hollow (312) and is coupled with the shaft screw thread (230) to convert the linear movement of the shaft (200) into rotation. In the illustrated embodiment, the transition protrusion (320) has a circular cross-section and a height in the left-right direction, but is formed in the shape of a concave cone whose cross-sectional area decreases toward one end in the height direction.

[0203] A plurality of transition protrusions (320) may be provided. The plurality of transition protrusions (320) may penetrate a plurality of transition hollows (312) and engage with the shaft screw threads (230) at different positions. In the illustrated embodiment, a pair of transition protrusions (320) are provided, each penetrating a pair of transition hollows (312) spaced apart from each other in the left-right direction. The pair of transition protrusions (320) face each other with the shaft body (210) interposed therebetween and engage with the shaft screw threads (230) at different positions.

[0204] The anti-rotation member (330) is coupled with the shaft support member (310) to prevent arbitrary rotation of the shaft support member (310). The anti-rotation member (330) can limit the rotation of the shaft support member (310) only in a preset direction. At this time, whether the shaft support member (310) is rotating can be easily recognized by the coupling structure of the anti-rotation member (330) and the shaft support member (310).

[0205] The anti-rotation member (330) is coupled to the switching member coupling portion (140). Specifically, the anti-rotation member (330) is accommodated in the anti-rotation member receiving portion (146). As described above, the anti-rotation member receiving portion (146) is in communication with the third switching member receiving space (143), so that the anti-rotation member (330) can be at least partially exposed to the third switching member receiving space (143).

[0206] The anti-rotation member (330) is coupled to the shaft support member (310). The anti-rotation member (330) can be arranged to at least partially contact the support protrusion (313) formed on the shaft support member (310).

[0207] The anti-rotation member (330) is coupled with a fixed pin (340). The position of the anti-rotation member (330) can be adjusted by the fixed pin (340).

[0208] In the illustrated embodiment, the anti-rotation member (330) includes an anti-rotation body (331), a pin coupling opening (332), a support protrusion (333), and an anti-rotation hollow (334).

[0209] The anti-rotation body (331) constitutes the body of the anti-rotation member (330). Other components of the anti-rotation member (330) are combined or formed in the anti-rotation body (331). In the illustrated embodiment, a pin coupling opening (332), a support protrusion (333), and an anti-rotation hollow (334) are formed in the anti-rotation body (331).

[0210] The anti-rotation body (331) is accommodated in the anti-rotation member receiving portion (146). The anti-rotation body (331) may have a shape corresponding to the shape of the anti-rotation member receiving portion (146). In the illustrated embodiment, the anti-rotation body (331) has a cylindrical shape with a circular cross-section and a height in the vertical direction.

[0211] The pin coupling opening (332) is a space through which the fixed pin (340) passes. The pin coupling opening (332) is formed to penetrate the anti-rotation body (331). In the illustrated embodiment, the pin coupling opening (332) is formed to penetrate in the diametric direction of the anti-rotation body (331), i.e., in the front-back direction. The extension direction of the pin coupling opening (332) may be the same as the extension direction of the pin insertion portion (145).

[0212] The pin coupling opening (332) may have any shape that allows the fixed pin (340) to pass through and support the fixed pin (340). In the illustrated embodiment, the pin coupling opening (332) is formed to have an oblong cross-section in which the vertical length is longer than the horizontal length.

[0213] Accordingly, when the shaft support member (310) is rotated, the rotation prevention member (330) can be moved up and down until the fixed pin (340) comes into contact with the inner circumference of the rotation prevention body (331) surrounding the pin coupling opening (332). Accordingly, the shaft support member (310) can be rotated as the support protrusion (333) passes over the support protrusion (313) in a preset direction (i.e., clockwise).

[0214] When the anti-rotation member (330) is accommodated in the anti-rotation member receiving portion (146), the pin coupling opening (332) can be arranged to overlap the pin insertion portion (145) along its extension direction, i.e., the front-back direction. Accordingly, the fixed pin (340) can easily pass through the pin insertion portion (145) and into the pin coupling opening (332).

[0215] The support protrusion (333) is a portion where the anti-rotation member (330) is coupled to the shaft support member (310). The support protrusion (333) is formed to protrude from one side in the height direction of the anti-rotation body (331), in the illustrated embodiment, from the lower side. The support protrusion (333) is at least partially exposed to the third switching member receiving space (143) and can come into contact with the support protrusion (313).

[0216] The support protrusion (333) can support the support protrusion (313) along a preset direction. As described above, in the embodiment illustrated in FIG. 13, the support protrusion (333) can support the support protrusion (313) in a counterclockwise direction, thereby limiting the counterclockwise rotation of the shaft support member (310).

[0217] The support protrusion (333) may have a shape corresponding to the shape of the support recessed portion (313). In the illustrated embodiment, the support protrusion (333) has a left end positioned lower than the right end, and its lower surface extends slanted toward the upper right side. It will be appreciated that the shape of the lower surface of the support protrusion (333) may be changed to correspond to the shape of the support recessed portion (313).

[0218] The anti-rotation hollow (334) is a space formed inside the anti-rotation body (331). The anti-rotation hollow (334) is formed by being recessed on the other side in the height direction of the anti-rotation body (331), that is, on the upper side in the illustrated embodiment. The anti-rotation hollow (334) is positioned opposite the support protrusion (333).

[0219] At this time, the anti-rotation hollow (334) can be positioned so as to be spaced apart in the height direction from the pin coupling opening (332). Therefore, the fixed pin (340) inserted into the pin coupling opening (332) is prevented from arbitrarily moving to the anti-rotation hollow (334).

[0220] As the anti-rotation hollow (334) is formed, the anti-rotation member (330) can be made lighter and its rigidity in the height direction can be reinforced.

[0221] The fixed pin (340) limits the height-direction movement distance of the anti-rotation member (330). The fixed pin (340) is inserted into the pin insertion portion (145) and penetrates the pin coupling opening (332). At this time, the pin insertion portion (145) extends to the front side of the anti-rotation member receiving portion (146), so that the fixed pin (340) can be arranged to penetrate the anti-rotation member receiving portion (146).

[0222] The fixed pin (340) may be formed to have a smaller cross-sectional area than the pin coupling opening (332). This is so that the rotation prevention member (330) can move up and down a predetermined distance when the fixed pin (340) is coupled. In the illustrated embodiment, the fixed pin (340) has a circular cross-section and extends in the front-back direction, so that it has a shorter length in the height direction than the pin coupling opening (332) which has a rectangular cross-section.

[0223] The washer member (350) rotatably supports the shaft support member (310). In addition, the washer member (350) is configured to buffer rotation of the handle (400) coupled to the shaft (200) while in contact with the switching member coupling portion (140), thereby preventing the rotation from being transmitted to the shaft support member (310).

[0224] The washer member (350) is coupled with the shaft body (210). A hollow space is formed through the inside of the washer member (350), so that the shaft body (210) can be coupled through the hollow space.

[0225] The washer member (350) is accommodated in the fourth transition member accommodation space (144). The washer member (350) covers the shaft support member (310) from the outside and can be accommodated in the fourth transition member accommodation space (144).

[0226] The handle (400) is a part that is gripped by the operator. The handle (400) receives an external force applied by the operator. In one embodiment, the handle (400) may receive an external force in the longitudinal direction of the shaft (200), i.e., in the forward and backward directions, or may receive a rotational force.

[0227] As described above, even when a longitudinal external force is applied to the handle (400), the applied external force can be at least partially converted into a rotational force by the combination of the shaft screw thread (230) and the switching projection (320).

[0228] The handle (400) is coupled with the shaft (200). Specifically, the handle (400) is coupled with the handle coupling portion (220) and can move and rotate together with the shaft (200). The handle (400) is exposed on the outside of the housing (100).

[0229] In the embodiment illustrated in FIGS. 15 and 16, the handle (400) includes a handle body (410) and a handle cap (420).

[0230] The handle body (410) constitutes the outer shape of the handle (400). The handle body (410) is the part that is gripped by the operator. The handle body (410) may have any shape that allows the operator to easily grip it and apply external force to it. In the illustrated embodiment, the handle body (410) is a three-dimensional shape having a polygonal cross-section and a thickness in the left-right direction.

[0231] A handle hollow (411) is formed inside the handle body (410).

[0232] The handle hollow portion (411) is a portion where the handle body (410) is connected to the handle connecting portion (220). The handle hollow portion (411) extends in the longitudinal direction of the shaft (200), i.e., in the front-back direction in the illustrated embodiment. One longitudinal side of the handle hollow portion (411), i.e., the front side in the illustrated embodiment, is open so that the handle connecting portion (220) can be inserted. The other longitudinal side of the handle hollow portion (411) is formed open, but can be closed by a handle cap (420).

[0233] Although not shown, a separate adhesive or fixing member may be provided to prevent the handle joint (220) inserted into the handle hollow (411) from being loose.

[0234] The handle cap (420) closes the other side of the handle hollow (411), the rear side in the illustrated embodiment. The handle cap (420) may be formed by including a material having a predetermined elasticity, such as rubber.

[0235] Referring to FIGS. 17 and 18, the coupling relationship between each component of the bone graft material mixer (10) according to one embodiment of the present invention described above is illustrated as an example.

[0236] The shaft (200) is coupled with the housing (100) such that the shaft body (210) and the piston coupling portion (240) are positioned in the housing hollow space (120). In this state, the handle coupling portion (220) is exposed to the outside of the housing (100) and coupled with the handle (400). The shaft body (210) is movably and rotatably supported by the inner circumference of the housing body (110) surrounding the first switching member receiving space (141).

[0237] In addition, the switching member (300) is coupled to the switching member connecting portion (140). At this time, the support protrusion (333) of the rotation prevention member (330) is coupled to the support protrusion (313) of the shaft support member (310), and the fixed pin (340) penetrates into the pin connecting opening (332).

[0238] In the above state, the switching protrusion (320) is inserted and connected to the shaft screw thread (230). Therefore, the shaft (200) can be rotated simultaneously with the linear movement so that the switching protrusion (320) moves along the shaft screw thread (230).

[0239]

[0240] Referring to FIGS. 19 to 22, a bone graft material mixer (20) according to another embodiment of the present invention is illustrated. Compared to the bone graft material mixer (10) according to the above-described embodiment, there is a difference in the syringe coupling portion (150) provided in the housing (100).

[0241] In the present embodiment, other components of the housing (100), i.e., the housing body (110), the housing hollow portion (120), and the switching member coupling portion (140), the shaft (200), the switching member (300), and the handle (400), are the same as those of the bone graft material mixer (10) according to the above-described embodiment. Accordingly, the description of the above-described components will be replaced with the above-described description.

[0242] In the illustrated embodiment, the housing (100) includes a housing body (110), a housing cavity (120), a switching member coupling portion (140), and a syringe coupling portion (150).

[0243] The syringe coupling portion (150) is a portion where the housing (100) is coupled to the syringe (1000). The syringe coupling portion (150) partially accommodates the syringe (1000). The shaft (200) can be coupled to the syringe (1000) through the syringe coupling portion (150). The syringe coupling portion (150) can partially surround the syringe (1000).

[0244] The syringe coupling portion (150) is coupled with the housing body (110). In one embodiment, the syringe coupling portion (150) may be formed integrally with the housing body (110). The syringe coupling portion (150) is positioned on one side of the housing body (110) in the longitudinal direction, that is, on the front side in the illustrated embodiment. The syringe coupling portion (150) is positioned opposite the switching member coupling portion (140).

[0245] The syringe coupling portion (150) may be of any shape that can be coupled with and accommodate the syringe (1000). In the illustrated embodiment, the syringe coupling portion (150) is formed with a hollow portion inside that is open on each longitudinal side, i.e., the front side and the rear side, and is formed to at least partially surround the hollow portion in the radial direction.

[0246] At this time, the syringe coupling portion (150) can be formed to have a larger cross-sectional area than the housing body (110). Accordingly, the syringe (1000) can be easily coupled to the syringe coupling portion (150).

[0247] In the illustrated embodiment, the syringe coupling portion (150) includes a syringe receiving space (151), a syringe penetration opening (152), a cover wing receiving portion (153), a cover wing (154), a wing rod (155), and a wing rod penetration opening (156).

[0248] The syringe receiving space (151) is defined as a portion of the space formed inside the syringe coupling portion (150). The syringe receiving space (151) receives a syringe (1000). The syringe body (1100) and the shaft coupling member (1530) provided in the syringe (1000) can be received in the syringe receiving space (151). In addition, the piston coupling portion (240) provided in the shaft (200) can be located in the syringe receiving space (151).

[0249] At this time, the syringe receiving space (151) can accommodate the piston coupling part (240) in a movable and rotatable manner. In addition, the syringe receiving space (151) can accommodate the piston (1500) in a movable and rotatable manner.

[0250] The syringe receiving space (151) is partially surrounded by the syringe coupling portion (150). In the illustrated embodiment, the radial directions of the syringe receiving space (151), i.e., the upper left, lower left, upper right, and lower right, are surrounded by the syringe coupling portion (150). The syringe receiving space (151) may have a shape corresponding to the shape of the syringe coupling portion (150). In the illustrated embodiment, the syringe receiving space (151) is formed as a space having a polygonal cross-section and a length in the front-back direction.

[0251] One longitudinal side of the syringe receiving space (151), the front side in the illustrated embodiment, is formed as open. A syringe (1000) can be positioned in the syringe receiving space (151) through the one side. The other longitudinal side of the syringe receiving space (151), the rear side in the illustrated embodiment, is formed as open and communicates with the housing hollow (120). The shaft (200) can extend to the syringe receiving space (151) through the other side.

[0252] The syringe penetration opening (152) is defined as a portion of a groove formed through the syringe coupling portion (150). The syringe penetration opening (152) forms a passage for the piston (1500) provided in the syringe (1000) to enter the syringe receiving space (151).

[0253] As will be described later, the piston (1500) can be coupled with a piston coupling portion (240) accommodated in a syringe receiving space (151) by passing through a syringe through opening (152). The syringe through opening (152) communicates with the syringe receiving space (151) and the outside.

[0254] The syringe penetration opening (152) may be formed in any shape that can constitute a passage for the piston (1500) to enter the syringe receiving space (151). In the illustrated embodiment, the syringe penetration opening (152) is defined as an opening having a length in the longitudinal direction of the housing body (110), i.e., a length in the front-back direction, and a height and thickness in the up-down direction or left-right direction. At this time, the cross-section of the syringe penetration opening (152) may be formed to be larger than the cross-section of the shaft coupling member (1530) of the piston (1500).

[0255] A plurality of syringe penetration openings (152) may be formed. The plurality of syringe penetration openings (152) may communicate with the outside and the syringe receiving space (151) at different locations. In the illustrated embodiment, two pairs of syringe penetration openings (152) are provided.

[0256] A pair of syringe penetration openings (152) are arranged to face each other with a syringe receiving space (151) interposed between them in the height direction of the syringe coupling portion (150), i.e., in the up-down direction. Another pair of syringe penetration openings (152) are arranged to face each other with a syringe receiving space (151) interposed between them in the width direction of the syringe coupling portion (150), i.e., in the left-right direction.

[0257] The cover wing receiving portion (153) rotatably receives the cover wing (154). The cover wing (154) can be rotated by a predetermined angle around the wing rod (155) while being received in the cover wing receiving portion (153).

[0258] The cover wing receiving portion (153) can be defined as a space formed by being sunken into a portion of the syringe coupling portion (150). In the illustrated embodiment, the cover wing receiving portion (153) is formed by being sunken into the outer periphery of the syringe coupling portion (150) surrounding the housing hollow portion (120) in a radial direction.

[0259] The cover wing receiving portion (153) may have any shape that can rotatably receive the cover wing (154). In the illustrated embodiment, the cover wing receiving portion (153) is formed as a space having a length in the front-back direction and a thickness in the up-down direction.

[0260] A plurality of cover wing receiving portions (153) may be provided. The plurality of cover wing receiving portions (153) are formed at different locations to rotatably receive a plurality of cover wings (154). In the illustrated embodiment, a pair of cover wing receiving portions (153) are provided, each formed on the upper and lower surfaces of the syringe coupling portion (150).

[0261] The cover wing (154) is accommodated in the cover wing receiving portion (153) and covers the syringe (1000) accommodated in the syringe receiving space (151) from the outside. The cover wing (154) can be accommodated in the cover wing receiving portion (153) so as to be rotatable by a predetermined angle.

[0262] The cover wing (154) may be of any shape that can be rotated by a predetermined angle to at least partially cover the syringe (1000). In the illustrated embodiment, the cover wing (154) is formed so that the width in the left-right direction is shorter than the length in the front-back direction and the thickness in the up-down direction is greater.

[0263] A plurality of cover wings (154) may be provided. The plurality of cover wings (154) may be rotatably accommodated in a plurality of cover wing receiving portions (153), respectively. In the illustrated embodiment, a pair of cover wings (154) are provided, and are accommodated in a pair of cover wing receiving portions (153), respectively.

[0264] The wing rod (155) rotatably supports the cover wing (154). The wing rod (155) is connected through a longitudinal central portion of the cover wing (154). The cover wing (154) can rotate around the wing rod (155).

[0265] The wing rod (155) is connected to the syringe coupling portion (150). Specifically, the wing rod (155) is connected to a wing rod penetration opening (156) formed through the outer periphery of the syringe coupling portion (150).

[0266] A plurality of wing rods (155) may be provided. The plurality of wing rods (155) may rotatably support a plurality of cover wings (154), respectively. In the illustrated embodiment, a pair of wing rods (155) are provided, each rotatably supporting a pair of cover wings (154).

[0267] The wing rod penetration opening (156) is a space for receiving the wing rod (155). The wing rod penetration opening (156) is formed penetrating the syringe coupling portion (150). In the illustrated embodiment, the wing rod penetration opening (156) is formed penetrating in each part of the syringe coupling portion (150) that surrounds the cover wing receiving portion (153) in the width direction, i.e., in the left-right direction. The wing rod penetration opening (156) connects the outside and the cover wing receiving portion (153).

[0268] A plurality of wing rod penetration openings (156) may be formed. The plurality of wing rod penetration openings (156) may each accommodate a plurality of wing rods (155). In the illustrated embodiment, a pair of wing rod penetration openings (156) are provided and are spaced apart from each other in the vertical direction. A pair of wing rod penetration openings (156) are respectively positioned adjacent to a pair of cover wing receiving portions (153).

[0269]

[0270] Referring to FIGS. 23 to 27, a process in which a bone graft material mixer (10) according to an embodiment of the present invention is coupled with a syringe (1000) and a bone graft material contained in the syringe (1000) is mixed is illustrated as an example. Although not illustrated, it will be understood that a bone graft material mixer (20) according to another embodiment of the present invention may also be coupled with a syringe (1000) according to the illustrated example and a bone graft material contained in the syringe (1000) may be mixed.

[0271] Referring to FIG. 23, the process of coupling the shaft coupling member (1330) of the syringe (1000) with the piston coupling part (240) is illustrated.

[0272] The piston (1300) is coupled with the syringe body (1100), such that one portion is positioned in the syringe space (1200) and the other portion is exposed to the outside of the syringe body (1100). At this time, the syringe space (1200) formed inside the syringe body (1100) can accommodate a bone graft material requiring a mixing process.

[0273] The shaft (200) is rotated by a predetermined angle so that the syringe penetration opening (132) and the piston insertion opening (241) are in communication. Accordingly, the piston receiving portion (242) is in communication with the outside through the syringe penetration opening (132) and the piston insertion opening (241).

[0274] In the above state, the shaft coupling member (1330) provided in the piston (1300) passes through the syringe penetration opening (132) and the piston insertion opening (241) in sequence and enters the piston receiving portion (242). The shaft coupling member (1330) that has entered the piston receiving portion (242) is supported by the inner circumference of the piston coupling portion (240).

[0275] Referring to FIGS. 24 and 25, as the piston coupling portion (240) and the shaft coupling member (1330) are coupled, the bone graft material mixer (10) and the syringe (1000) are arranged in parallel along the extension direction, i.e., the front-back direction.

[0276] In the above state, the syringe (1000) is moved toward the bone graft material mixer (10), and the syringe wing (1110) of the syringe body (1100) is received in the syringe penetration opening (132). Accordingly, rotation of the syringe (1000) can be prevented.

[0277] Meanwhile, the shaft coupling member (1330) coupled with the piston coupling portion (240) is also moved together with the syringe body (1100) toward the bone graft material mixer (10). Accordingly, the shaft (200) is also moved (and rotated) in the opposite direction to the syringe (1000), i.e., toward the rear, so that the shaft body (210) is exposed to the outside.

[0278] Referring to FIGS. 26 and 27, a process in which a shaft (200) and a piston (1300) connected thereto are moved and rotated by an external force applied to a handle (400) is illustrated as an example.

[0279] As an external force directed toward one side in the longitudinal direction is applied to the handle (400), an external force directed toward the one side in the longitudinal direction is also applied to the shaft (200) coupled with the handle (400) and the piston (1300) coupled thereto. At this time, by the engagement of the shaft screw thread (230) and the switching projection (320), the shaft (200) moves toward the one side in the longitudinal direction and simultaneously rotates in one direction.

[0280] In addition, as an external force directed toward the other side in the longitudinal direction is applied to the handle (400), an external force directed toward the other side in the longitudinal direction is also applied to the shaft (200) coupled to the handle (400) and the piston (1300) coupled thereto. At this time, by the engagement of the shaft screw thread (230) and the switching projection (320), the shaft (200) moves toward the other side in the longitudinal direction and simultaneously rotates in the other direction.

[0281] Accordingly, the piston body (1310) and the piston stirring member (1320), which are coupled to the shaft coupling member (1330) and positioned in the syringe space (1200), are also rotated while moving in the longitudinal direction. Accordingly, the bone graft material accommodated in the syringe space (1200) can be mixed (i.e., stirred).

[0282] Once the mixing of the bone graft material is completed, the processes of FIGS. 23 to 25 are performed in reverse, so that the syringe (1000) can be separated from the bone graft material mixer (10). The mixed bone graft material can be provided to the patient through the syringe outlet (1120) formed in the syringe body (1100) and communicating with the outside of the syringe space (1200).

[0283] Therefore, the bone graft material mixer (10) according to an embodiment of the present invention can minimize the situation in which bone graft material is exposed to the outside during the extraction, mixing, separation, and injection processes of bone graft material. At the same time, a single bone graft material mixer (10) can perform all of the processes of extraction, mixing, and separation of bone graft material.

[0284] As a result, the mixing process of bone graft material can be performed easily and efficiently, and contamination of the mixed bone graft material can be minimized.

[0285]

[0286] Although the embodiments of the present invention have been described, the spirit of the present invention is not limited to the embodiments presented in this specification, and those skilled in the art who understand the spirit of the present invention will be able to easily propose other embodiments by adding, changing, deleting, or adding components within the scope of the same spirit, but this will also be considered to fall within the spirit of the present invention.

[0287] 10: Bone graft mixer 20: Bone graft mixer

[0288] 100: Housing 110: Housing body

[0289] 120: Housing hollow 130: Syringe joint

[0290] 131: Syringe receiving space 132: Syringe penetration opening

[0291] 133: Syringe check opening 140: Transition member joint

[0292] 141: First transition member accommodation space 142: Second transition member accommodation space

[0293] 143: Third transition absence accommodation space 144: Fourth transition absence accommodation space

[0294] 145: Pin insertion portion 146: Anti-rotation member receiving portion

[0295] 150: Syringe coupling 151: Syringe receiving space

[0296] 152: Syringe penetration opening 153: Cover wing receiving portion

[0297] 154: Cover wing 155: Wing rod

[0298] 156: Wing rod penetration opening 200: Shaft

[0299] 210: Shaft body 211: Shaft hollow

[0300] 220: Handle joint 230: Shaft thread

[0301] 240: Piston joint 241: Piston insertion opening

[0302] 242: Piston receiving portion 300: Switching member

[0303] 310: Shaft support member 311: Support hollow

[0304] 312: Transition hollow 313: Supporting groove

[0305] 320: Transition protrusion 330: Anti-rotation member

[0306] 331: Anti-rotation body 332: Pin coupling opening

[0307] 333: Support protrusion 334: Anti-rotation hollow

[0308] 340: Fixed pin 350: Washer missing

[0309] 400: Handle 410: Handle body

[0310] 411: Hollow handle 420: Cap handle

[0311] 1000: Syringe 1100: Syringe body

[0312] 1110: Syringe wing 1120: Syringe outlet

[0313] 1200: Syringe space 1300: Piston

[0314] 1310: Piston body 1320: Piston stirring member

[0315] 1330: Shaft coupling member

Claims

1. A housing extending in one direction and having a housing cavity formed inside; a shaft which is rotatably received in the hollow housing and movably in the one direction, and which is at least partially exposed to the outside of the housing; and A switching member is included, which is coupled with the housing and coupled with the shaft to convert the movement in the one direction into the rotation. The above shaft, A shaft body extending in the above one direction and rotatably and movably received in the hollow of the housing; A piston coupling portion positioned at one end of the shaft body in the extension direction and coupled with an external syringe containing a bone graft material; and Including a shaft screw thread formed on the outer periphery of the shaft body, extending in a helical shape along the one direction, and coupled with the switching member, The longitudinal external force applied to the above shaft is at least partially converted into a rotational force by the above switching member. Bone graft mixer.

2. In paragraph 1, The above transition absence is, A shaft support member that supports the shaft body so that it can move and rotate; and A shaft supporting member is coupled with a transition projection coupled to the shaft threads, Bone graft mixer.

3. In paragraph 2, The above shaft support member, A support hollow formed by penetrating in the above one direction and through which the shaft body is movably and rotatably penetrated; and A transition cavity is formed penetrating the outer periphery surrounding the above support cavity in a radial direction and includes a transition cavity that accommodates the above transition protrusion. The above transition projection penetrates the transition cavity and is at least partially exposed to the transition cavity and engages the shaft threads. Bone graft mixer.

4. In paragraph 3, The above transition hollows are provided in multiple numbers and formed in different locations, The above switching projections are provided in multiple numbers and are respectively connected to the multiple switching hollows and connected to the shaft screw threads at different locations. Bone graft mixer.

5. In paragraph 1, The above housing, It includes a syringe coupling portion positioned at one end of the above one direction, coupled with the syringe, and having a syringe receiving space formed inside that is communicated with the housing hollow space, The above piston joint is, Positioned in the above syringe receiving space and coupled with a shaft coupling member provided in the syringe, Bone graft mixer.

6. In paragraph 5, The above piston joint is, A piston receiving portion formed inside it and being a space for receiving the shaft coupling member; and A piston insertion opening is formed in the outer periphery surrounding the piston receiving portion and communicates with the outside and the piston receiving portion to form a passage through which a piston body coupled with the shaft coupling member passes. Bone graft mixer.

7. In paragraph 6, The shaft coupling member accommodated in the piston receiving portion is, Supported by the inner circumference of the piston coupling part surrounding the piston receiving part, and moved and rotated together with the piston coupling part, Bone graft mixer.

8. In paragraph 5, The above syringe coupling part, A syringe penetration opening formed through an outer periphery surrounding the syringe receiving space, communicating with the outside of the syringe receiving space, and into which a syringe wing provided in the syringe is inserted. Bone graft mixer.

9. In paragraph 8, The syringe wing inserted into the syringe penetration opening is supported by the inner circumference of the syringe coupling portion surrounding the syringe penetration opening and prevented from rotating. Bone graft mixer.

10. In paragraph 1, The above transition absence is, A shaft support member that supports the shaft body so that it can move and rotate; and Including a rotation prevention member configured to contact the shaft support member and prevent rotation of the shaft support member, Bone graft mixer.

11. In paragraph 10, The above shaft support member, It includes a support recessed portion having a sawtooth shape that extends along the outer periphery of one side in the longitudinal direction and includes a portion inclined along one of the clockwise and counterclockwise directions, The above rotation prevention member is, Including a support projection that protrudes toward the shaft support member and is configured to contact the support protrusion to prevent rotation of the shaft support member in any one direction. Bone graft mixer.

12. In paragraph 11, The end of the above support protrusion extends in an inclined direction in one of the above directions, Bone graft mixer.

13. In paragraph 1, A handle portion is coupled to the shaft on the outside of the housing and receives an external force in the longitudinal direction. The above shaft, A handle coupling portion positioned at the other end of the shaft body in the extension direction and exposed to the outside of the housing and coupled with the handle portion, Bone graft mixer.

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