Bottle holding mechanism and carbon dioxide gas injection device

Abstract

To provide a bottle holding mechanism and a carbon dioxide gas injection device, each enabling a user to easily recognize that a bottle has been held.SOLUTION: A bottle holding mechanism comprises: a housing 10; a first annular member 30 which has a first opposing surface and is arranged in such a manner that the first annular member 30 can translate in first and second translational directions; a second annular member 40 which is arranged in such a manner that it can revolve in first and second revolving directions and which has a second opposing surface opposite to the first opposing surface, an end surface on the opposite side of the second opposing surface, a mouth into which a mouth portion of a bottle is inserted, and a groove 44 with which a projection 3 engages; a holder 20 which holds the housing in such a manner that the housing can revolve in third and fourth revolving directions; and a restriction portion which restricts movement of the projection. Revolving of the housing in the third and fourth revolving directions is translation of the first annular member in the first and second translational directions. The groove includes a vertical groove portion 441 extending in an axial direction of the second annular member, and a lateral groove portion 442 extending in the first revolving direction. After the projection engages with the vertical groove portion, the bottle is revolved in the first revolving direction and revolved in the third revolving direction, consequently the mouth comes into a locked state.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a bottle holding mechanism and a carbon dioxide gas injection device. [Background technology]

[0002] Patent Document 1 discloses a clamping device that forms part of a carbonation head assembly that attaches a carbonated beverage container to a carbonator. The clamping device has a plurality of radially arranged prongs that hold the mouth of the container, and a clamping ring that clamps the prongs so that the mouth of the container is held by the prongs when a user positions the container in an upright position on the carbonation head assembly and moves the container to an upright position. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6049031 Summary of the Invention [Problem to be solved by the invention]

[0004] In the clamping device of Patent Document 1, the mouth of the container is held by multiple clamps by positioning the mouth of the container non-vertically on the carbonation head assembly and then rotating the container to a vertical position. However, it is difficult to know at what point the container is securely held, which can cause anxiety to the user.

[0005] The present invention provides a bottle holding mechanism and a carbon dioxide gas injection device that allow a user to easily recognize that a bottle is being held. [Means for solving the problem]

[0006] A first aspect of the present invention relates to a bottle holding mechanism, the bottle holding mechanism comprising: a housing; a first annular member disposed within the housing so as to be translatable in a first translational direction and a second translational direction that are opposite to each other, the first annular member having a first opposing surface; a second annular member disposed within the housing so as to be rotatable in a first rotational direction and a second rotational direction that are opposite to each other, the second annular member having a second opposing surface opposing the first opposing surface, an end surface opposite the second opposing surface, an opening into which a mouth of a bottle is inserted, and a groove extending from the end surface to engage with a protrusion provided on the mouth; a holder that holds the housing so as to be rotatable in a third rotational direction and a fourth rotational direction that are opposite to each other; and a limiting portion that limits movement of the protrusion within the groove, Rotation of the housing in a third rotation direction is converted into translation of the first annular member in the first translation direction, rotation of the housing in the fourth rotation direction is converted into translation of the first annular member in the second translation direction, the groove includes a vertical groove portion extending from the end face of the second annular member in the axial direction of the second annular member and a horizontal groove portion extending from the vertical groove portion in the first rotation direction, the bottle is rotated so that the protrusion engages with the vertical groove portion and then rotates in the first rotation direction along the horizontal groove portion, and then the bottle is rotated in the third rotation direction, causing the first annular member to move in the first translation direction, and in this state the movement of the protrusion in the groove is restricted by the restricting portion, thereby locking the mouth portion.

[0007] A second aspect of the present invention relates to a carbon dioxide gas injection device that injects carbon dioxide gas into a bottle, the carbon dioxide gas injection device comprising: a bottle holding mechanism according to the first aspect; and a carbon dioxide gas supply unit that supplies carbon dioxide gas to a bottle held by the bottle holding mechanism. [Effects of the Invention]

[0008] According to the present invention, a bottle holding mechanism and a carbon dioxide gas injection device are provided that allow a user to easily recognize that a bottle is being held. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a diagram illustrating the configuration of a carbon dioxide gas injection device according to an embodiment. [Figure 2] FIG. 2 is an enlarged view of the carbon dioxide gas injection device according to an embodiment. [Figure 3] FIG. 2 is an enlarged view of the carbon dioxide gas injection device according to an embodiment. [Figure 4] 1A and 1B are diagrams for explaining the configuration and operation of a carbon dioxide gas injection device or a bottle holding mechanism according to an embodiment. [Figure 5] 1A and 1B are diagrams for explaining the configuration and operation of a carbon dioxide gas injection device or a bottle holding mechanism according to an embodiment. [Figure 6] 1A and 1B are diagrams for explaining the configuration and operation of a carbon dioxide gas injection device or a bottle holding mechanism according to an embodiment. [Figure 7] 1A and 1B are diagrams for explaining the configuration and operation of a carbon dioxide gas injection device or a bottle holding mechanism according to an embodiment. [Figure 8] 1A and 1B are diagrams for explaining the configuration and operation of a carbon dioxide gas injection device or a bottle holding mechanism according to an embodiment. [Figure 9] 1A and 1B are diagrams for explaining the configuration and operation of a carbon dioxide gas injection device or a bottle holding mechanism according to an embodiment. [Figure 10] 1A and 1B are diagrams for explaining the configuration and operation of a carbon dioxide gas injection device or a bottle holding mechanism according to an embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. Note that the following embodiments do not limit the scope of the invention as claimed, and not all combinations of features described in the embodiments are necessarily essential to the invention. Two or more of the features described in the embodiments may be arbitrarily combined. Furthermore, the same reference numerals are used for the same or similar components, and redundant descriptions will be omitted.

[0011] Fig. 1 shows an example of the configuration of a carbon dioxide gas injection device 100 according to one embodiment. Figs. 2 and 3 show enlarged views of a portion of the carbon dioxide gas injection device 100 shown in Fig. 1. Fig. 2 shows a state in which a bottle 1 is being attached to the carbon dioxide gas injection device 100, or a state in which a bottle 1 is being removed from the carbon dioxide gas injection device 100. Fig. 3 shows a state in which the carbon dioxide gas injection device 100 is ready to inject carbon dioxide gas into the bottle 1, a state in which the carbon dioxide gas injection device 100 is in the process of injecting carbon dioxide gas into the bottle 1, or a state in which the carbon dioxide gas injection device 100 has completed the operation of injecting carbon dioxide gas into the bottle 1.

[0012] As shown in FIGS. 1 and 2 , the mouth of the bottle 1 is inserted obliquely upward in a direction U into the insertion hole 11 of the bottle holding mechanism BHM with the axial direction of the bottle 1 inclined relative to the vertical direction (inclined state), and then rotated in a first rotation direction R1, thereby being held by the bottle holding mechanism BHM or the carbon dioxide injection device 100. In this state, even if the bottle 1 is pulled obliquely downward in a direction D, the bottle 1 will not come out of the insertion hole 11 of the bottle holding mechanism BHM. Therefore, according to this embodiment, it is easy for the user to know that the bottle 1 is being held by the bottle holding mechanism BHM. Furthermore, the operation until the bottle 1 is held by the bottle holding mechanism BHM is simple.

[0013] Thereafter, the bottle 1 can be rotated in a third rotation direction R3 as shown in FIG. 3 to a vertically parallel state (vertical state). This state indicates that the bottle 1 is completely held by the bottle holding mechanism BHM or the carbon dioxide gas injection device 100, or that the mouth portion 2 of the bottle 1 (or the bottle 1) is locked. From this locked state, the bottle 1 cannot be removed from the insertion hole 11 of the bottle holding mechanism BHM unless the bottle 1 is rotated in a fourth rotation direction R4, which is the opposite direction of the third rotation direction R3, and then in a second rotation direction R2, which is the opposite direction of the first rotation direction R1. According to this embodiment, the mouth portion of the bottle 1 can be locked by a simple and easy-to-understand operation of inserting the mouth portion of the bottle 1 into the insertion hole 11 of the bottle holding mechanism BHM, rotating it in the first rotation direction R1, and then rotating it in the third rotation direction R3.

[0014] When bottle 1 is completely held by bottle holding mechanism BHM or carbon dioxide injection device 100, or in a locked state, carbon dioxide gas can be injected into bottle 1 through tube 85 by carbon dioxide gas supply unit 90. Bottle 1 is then rotated in a fourth rotation direction R4, which is the opposite direction to third rotation direction R3, to return to the tilted state, and then further rotated in a second rotation direction R2, which is the opposite direction to first rotation direction R1, to enable it to be removed from bottle holding mechanism BHM. In other words, the locked state is released when bottle 1 is rotated in the second rotation direction R2 after being rotated in the fourth rotation direction R4. In this state, bottle 1 is removed from bottle holding mechanism BHM or carbon dioxide injection device 100 by being pulled out of bottle holding mechanism BHM in the diagonally downward direction D.

[0015] Here, the first rotation direction R1 and the second rotation direction R2 indicate the direction of rotation (roll direction) around the central axis of the bottle 1 as the rotation axis, and the third rotation direction R3 and the fourth rotation direction R4 indicate the direction of rotation (pitching direction) around the central axis of the bottle 1.

[0016] Figure 4(a) schematically shows the carbon dioxide gas injection device 100 or the bottle holding mechanism BHM waiting for the bottle 1 to be attached (inserted), or the state in which the bottle 1 has been removed from the carbon dioxide gas injection device 100 or the bottle holding mechanism BHM. Figure 4(b) schematically shows the state in which the bottle 1 has been attached to the carbon dioxide gas injection device 100 or the bottle holding mechanism BHM and is in a vertical position (locked state). The bottle holding mechanism BHM can receive the bottle 1 in an inclined position, with its axial direction inclined relative to the vertical.

[0017] As shown schematically in FIG. 4(a), the bottle 1 may have a mouth 2 provided with a protrusion 3. The carbon dioxide gas injection device 100 or the bottle holding mechanism BHM may hold the bottle 1 or the mouth 2 of the bottle 1 using the protrusion 3. When the bottle 1 is held in a vertical state by the bottle holding mechanism BHM, i.e., in a locked state, the bottle holding mechanism BHM may also be in a vertical state with its axial direction parallel to the vertical direction.

[0018] The configurations and operations of the bottle holding mechanism BHM and the carbon dioxide gas injector 100 will be described below with reference to Fig. 4 as well as Figs. 5 to 10. In Figs. 6 to 10, the holder 20 is removed for improved visibility. Fig. 10 is an enlarged view of a portion of Fig. 6.

[0019] The bottle holding mechanism BHM may include a housing 10 and a holder 20 that holds the housing 10 rotatably in a third rotation direction R3 and a fourth rotation direction R4 that are opposite to each other. The bottle holding mechanism BHM may also include a first annular member 30 and a second annular member 40. The first annular member 30 and the second annular member 40 may be held by the housing 10.

[0020] The first annular member 30 may be arranged translatably in a first translation direction T1 and a second translation direction T2 that are opposite to each other within the housing 10. The first annular member 30 may have a first opposing surface 31. The first opposing surface 31 may be a sawtooth engagement surface.

[0021] The second annular member 40 can be arranged within the housing 10 to be rotatable in a first rotation direction R1 and a second rotation direction R2, which are opposite to each other. As illustrated in FIG. 10 , the second annular member 40 can have a second opposing surface 41 opposing the first opposing surface 31 and an end surface 42 opposite the second opposing surface 41. The second opposing surface 41 can be a sawtooth-shaped engagement surface. When the mouth portion 2 of the bottle 1 is in a locked state where it is locked, the first engagement surface serving as the first opposing surface 31 can engage with the second engagement surface serving as the second opposing surface 41.

[0022] The second annular member 40 may also have an opening 43 into which the mouth 2 of the bottle 1 is inserted, and a groove 44 extending from the end face 42 so as to engage with a protrusion 3 provided on the mouth 2 of the bottle 1. The groove 44 may include a vertical groove portion 441 extending from the end face 42 of the second annular member 40 in the axial direction of the second annular member 40 (second translation direction T2), and a horizontal groove portion 442 extending from the vertical groove portion 441 in the circumferential direction of the second annular member 40 (first rotation direction R1).

[0023] 4 and 5, the holder 20 holds the housing 10 rotatably in a third rotation direction R3 and a fourth rotation direction R4 that are opposite to each other. Also, as shown in FIG. 8, the bottle holding mechanism BHM may include a limiting portion 70 that limits movement of the protrusion 3 of the mouth portion 2 within the groove 44. The limiting portion 70 may be fixed to the first annular member 30. Alternatively, the limiting portion 70 may be configured as a part of the first annular member 30.

[0024] Rotation of the housing 10 in the third rotation direction R3 is converted into translation of the first annular member 30 in the first translation direction T1, and rotation of the housing 10 in the fourth rotation direction R4 is converted into translation of the first annular member 30 in the second translation direction T2. ​​After the protrusion 3 of the mouth portion 2 engages with the vertical groove 441, the bottle 1 is rotated so that it rotates in the first rotation direction R1 along the horizontal groove 442. Then, by rotating the bottle 1 in the third rotation direction R3, the first annular member 30 can move in the first translation direction T1. In this state, the movement of the protrusion 3 in the groove 44 is limited by the limiting member 70, locking the mouth portion 2 or the bottle 1 and establishing a locked state. The locked state in which the mouth portion 2 is locked can be maintained unless the bottle 1 is rotated in the fourth rotation direction R4. Furthermore, the bottle 1 cannot be pulled out from the opening 43 or the insertion hole 11 simply by rotating the bottle 1 in the fourth rotation direction R4 from a state in which the mouth portion 2 is locked.

[0025] When the housing 10 and the bottle 1 are inclined, the first translation direction T1 and the second translation direction T2 may be parallel to the diagonally upward direction U and the diagonally downward direction D. When the housing 10 and the bottle 1 are in a vertical state, the first translation direction T1 and the second translation direction T2 may be parallel to the vertical direction.

[0026] Insertion of the neck portion 2 of the bottle 1 into the insertion hole 11 of the bottle holding mechanism BHM can also be understood as insertion of the neck portion 2 into the opening 43 of the second annular member 40. The neck portion 2 is inserted into the opening 43 of the second annular member 40 so that the protrusion 3 engages with the groove 44. As described above, the groove 44 may include a vertical groove 441 and a horizontal groove 442. Insertion of the neck portion 2 of the bottle 1 into the opening 43 or the insertion hole 11 involves insertion of the protrusion 3 into the vertical groove 441, and subsequent rotation of the bottle 1 in the first rotation direction R1 involves rotation of the protrusion 3 in the horizontal groove 442 in the first rotation direction R1. Rotation of the bottle 1 in the first rotation direction R1 causes the protrusion 3 to abut against the deepest portion 443 of the horizontal groove 442, causing the second annular member 40 to rotate in the first rotation direction R1. The rotatable range of the second annular member 40 in the first rotation direction R1 can be limited, for example, by the limiting portion 70 coming into contact with a second limiting portion (not shown) provided on the second annular member 40.

[0027] As illustrated in FIG. 4(a), the housing 10 may include a bottom surface portion 12 and a side surface portion 13 extending from the bottom surface portion 12 (in a direction parallel to the first translational direction T1). The bottom surface portion 12 may have an insertion hole 11 into which the mouth portion 2 of the bottle 1 is inserted, and may be configured to restrict the second annular member 40 with respect to the first translational direction T1. The side surface portion 13 may be configured to at least partially surround the first annular member 30 and the second annular member 40. The side surface portion 13 may have, for example, a rectangular cylindrical shape.

[0028] The bottle holding mechanism BHM may further include a holding member 50 that holds the first annular member 30 inside the housing 10. A slot extending in the axial direction of the housing 10 may be provided in the side surface portion 13 of the housing 10. The holding member 50 may have a protrusion 52 that protrudes through the slot provided in the side surface portion 13 of the housing 10. As schematically shown in FIGS. 4(a) and 4(b), the holder 20 may have a pivotal support portion 22 that pivotally supports the housing 10 to enable rotation of the housing 10 in the first rotational direction R1 and the second rotational direction R2, and a guide groove 24 that guides the protrusion 52.

[0029] Rotation of the housing 10 in the third rotation direction R3 and the fourth rotation direction R4 can be converted into movement of the first annular member 30 in the first translation direction T1 and the second translation direction T2 by the protrusion 52 moving in the guide groove 24. More specifically, rotation of the housing 10 in the third rotation direction R3 can be converted into translation of the first annular member 30 in the first translation direction T1, and rotation of the housing 10 in the fourth rotation direction R4 can be converted into translation of the first annular member 30 in the second translation direction.

[0030] The holding member 50 has a first engagement portion 55, and the second annular member 40 has a second engagement portion 45, and when the mouth portion 2 of the bottle 1 is in a locked state, the second engagement portion 45 can be engaged with the first engagement portion 55.

[0031] As illustrated in FIG. 4( b), the bottle holding mechanism BHM may further include an indicator DS that indicates a state in which the bottle 1 has been rotated so that the protrusion 3 of the mouth portion 2 engages with the vertical groove 441 and then rotates along the horizontal groove 442 in the first rotation direction R1. The indicator DS may include, for example, a mark 48 provided on the second annular member 40 that is rotatable in the first rotation direction R1 and the second rotation direction R2, and a window 18 provided in the housing 10. In one example, when the bottle 1 is rotated so that the protrusion 3 is inserted into the vertical groove 441 and then rotates along the horizontal groove 442 in the first rotation direction R1, the mark 48 having the first collar appears in the window 18. On the other hand, when the bottle 1 is rotated from that state so that the protrusion 3 rotates along the horizontal groove 442 in the second rotation direction R2, a portion having the second collar (e.g., a part of the second annular member 40) appears in the window 18.

[0032] The bottle holding mechanism BHM may further include a coil spring 60 that applies a force to the first annular member 30 and the second annular member 40 in a direction separating the first annular member 30 and the second annular member 40 from each other. The coil spring 60 may be arranged to generate a resistance force against rotation of the second annular member 40 in the first rotation direction R1.

[0033] As illustrated in Fig. 10 , the bottle holding mechanism BHM may include a sealing unit 80 that seals the mouth 2 of the bottle 1 when the mouth 2 is inserted to a predetermined depth into the opening 43 of the second annular member 40. The bottle holding mechanism BHM may further include a tube 85 that passes through the first annular member 30 and the second annular member 40. The carbon dioxide gas supply unit 90 of the carbon dioxide gas injection device 100 may be configured to inject carbon dioxide gas into the bottle 1 (the beverage in the bottle 1) through the tube 85. The sealing unit 80 may be attached to the tube 85.

[0034] Attachment of the bottle 1 to the carbon dioxide gas injector 100 or the bottle holding mechanism BHM and removal of the bottle 1 from the carbon dioxide gas injector 100 or the bottle holding mechanism BHM will be described below with reference to FIGS.

[0035] 5, 6, and 10 show how the mouth portion 2 of the bottle 1 is inserted obliquely upward in the direction U into the opening 43 (insertion hole 11 of the housing 10) of the second annular member 40, and the protrusion 3 of the mouth portion 2 engages with the groove 44 (vertical groove portion 441) of the second annular member 40. Note that the housing 10 is not shown in FIGS. 6 to 10.

[0036] Figure 7 shows the state in which the bottle 1 is rotated in the first rotation direction R1 from the state shown in Figures 5, 6, and 10, thereby moving the protrusion 3 in the first rotation direction R1 within the lateral groove portion 442.

[0037] 8 shows a locked state in which the bottle 1 is rotated in the third rotation direction R3 from the state shown in FIG. 7, thereby translating the first annular member 30 in the first translation direction T1 and locking the bottle 1 or the mouth portion 2. In this state, the carbon dioxide gas supply unit 90 injects carbon dioxide gas into the bottle 1 (the beverage in the bottle 1) through the tube 85. After the injection of carbon dioxide gas into the bottle 1 is complete, the carbon dioxide gas injection device 100 can prompt the user, for example, by a notification unit (not shown), to return the bottle 1 to the tilted state.

[0038] 9 shows the bottle 1 rotated in the fourth rotation direction R4 after the bottle 1 (the beverage in the bottle 1) has been filled with carbon dioxide gas. In this state, the protrusion 3 is still engaged with the lateral groove 442. Therefore, the bottle 1 cannot be pulled out.

[0039] Thereafter, the bottle 1 is rotated in the second rotation direction R2, thereby assuming the state shown in Figures 5, 6, and 10. In this state, the mouth portion 2 of the bottle 1 can be pulled out obliquely downward in the direction D from the opening 43 of the second annular member 40 (the insertion hole 11 of the housing 10).

[0040] As described above, in the state shown in FIG. 8 , carbon dioxide gas can be injected into bottle 1 (the beverage filled in bottle 1) by carbon dioxide gas supply unit 90 through tube 85. The injection of carbon dioxide gas into bottle 1 can be performed in response to a user operating an operation button (not shown). Alternatively, the injection of carbon dioxide gas into bottle 1 can be performed or stopped in response to the output of a sensor that detects that housing 10 has reached the vertical position shown in FIG. 8. This configuration in which carbon dioxide gas is injected into bottle 1 by carbon dioxide gas supply unit 90 on the condition that the state shown in FIG. 8 is reached makes it possible to prevent carbon dioxide gas from being sprayed from carbon dioxide gas supply unit 90 even when bottle 1 is not correctly attached to bottle holding mechanism BHM.

[0041] The invention is not limited to the above-described embodiment, and various modifications and variations are possible within the scope of the gist of the invention. [Explanation of symbols]

[0042] 1: bottle, 2: mouth, 3: protrusion, BHM: bottle holding mechanism, U: diagonally upward, D: diagonally downward, 10: housing, 11: insertion hole, 12: bottom surface, 13: side surface, 18: window, 20: holder, 22: bearing portion, 24: guide groove, 30: first annular member, 31: first opposing surface, 40: second annular member, 41: second opposing surface, 42: end surface, 43: opening, 44: groove, 441: vertical groove, 442: horizontal groove , 443: deepest part, 45: second engagement part, 48: mark, 50: holding member, 52: protrusion, 55: first engagement part, 60: coil spring, 70: limiting part, 80: sealing part, 85: tube, 90: carbon dioxide gas supply part, 100: carbon dioxide gas injection device, T1: first translation direction, T2: second translation direction, R1: first rotation direction, R2: second rotation direction, R3: third rotation direction, R4: fourth rotation direction, DS: indicator

Claims

1. Housing and a first annular member disposed within the housing so as to be translatable in a first translation direction and a second translation direction that are opposite to each other, the first annular member having a first opposing surface; a second annular member disposed in the housing so as to be rotatable in a first rotation direction and a second rotation direction which are opposite to each other, the second annular member having a second opposing surface opposing the first opposing surface, an end surface opposite the second opposing surface, an opening into which the mouth of the bottle is inserted, and a groove extending from the end surface to engage with a protrusion provided on the mouth; a holder that holds the housing rotatably in a third rotation direction and a fourth rotation direction that are opposite to each other; a limiting portion that limits movement of the protrusion within the groove, rotation of the housing in the third rotation direction is converted into translation of the first annular member in the first translation direction, and rotation of the housing in the fourth rotation direction is converted into translation of the first annular member in the second translation direction; the groove includes a vertical groove portion extending from the end surface of the second annular member in the axial direction of the second annular member and a horizontal groove portion extending from the vertical groove portion in the first rotation direction, After the protrusion engages with the vertical groove, the bottle is rotated so as to rotate along the horizontal groove in the first rotation direction, and then the bottle is rotated in the third rotation direction, causing the first annular member to move in the first translation direction. In this state, the movement of the protrusion in the groove is restricted by the restricting portion, thereby locking the mouth. A bottle holding mechanism.

2. The locked state is released when the bottle is rotated in the second rotation direction after being rotated in the fourth rotation direction.

2. The bottle holding mechanism according to claim 1.

3. In the locked state, the bottle cannot be pulled out from the opening simply by being rotated in the fourth rotation direction.

3. The bottle holding mechanism according to claim 2.

4. the housing includes a bottom surface portion having an insertion hole into which the mouth portion is inserted and restricting the second annular member in the first translation direction, and a side surface portion extending from the bottom surface portion so as to at least partially surround the first annular member and the second annular member.

2. The bottle holding mechanism according to claim 1.

5. The side surface portion has a rectangular cylindrical shape.

5. The bottle holding mechanism according to claim 4.

6. a retaining member for retaining the first annular member within the housing; the retaining member has a protrusion that protrudes through a slot provided in the side surface of the housing; the holder has a pivotal support portion that pivotally supports the housing so as to enable rotation of the housing in the third rotation direction and the fourth rotation direction, and a guide groove that guides the protrusion.

5. The bottle holding mechanism according to claim 4.

7. the holding member has a first engaging portion, and the second annular member has a second engaging portion; In the locked state, the second engagement portion is engaged with the first engagement portion.

7. The bottle holding mechanism according to claim 6.

8. The first opposing surface has a sawtooth-shaped first engagement surface, and the second opposing surface has a sawtooth-shaped second engagement surface, and in the locked state, the first engagement surface engages with the second engagement surface.

2. The bottle holding mechanism according to claim 1.

9. a coil spring that applies a force to the first annular member and the second annular member in a direction that separates the first annular member and the second annular member from each other, 2. The bottle holding mechanism according to claim 1.

10. the coil spring is disposed so as to generate a resistance force against rotation of the second annular member in the first rotation direction.

10. The bottle holding mechanism according to claim 9.

11. and a display that displays a state in which the bottle has been rotated so that the protrusion engages with the vertical groove and then rotates along the horizontal groove in the first rotation direction.

2. The bottle holding mechanism according to claim 1.

12. The limiting portion is fixed to the first annular member.

12. The bottle holding mechanism of claim 11.

13. The locking mechanism further includes a seal portion that seals the opening portion in the locked state.

2. The bottle holding mechanism according to claim 1.

14. a tube passing through the first annular member and the second annular member; The seal is attached to the tube.

14. The bottle holding mechanism of claim 13.

15. A carbon dioxide gas injection device for injecting carbon dioxide gas into a bottle, a bottle holding mechanism according to any one of claims 1 to 14; a carbon dioxide gas supply unit that supplies carbon dioxide gas to the bottle held by the bottle holding mechanism; A carbon dioxide gas injection device comprising:

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