Up-down adjusting mechanism of seat headrest and seat

Abstract

The utility model discloses an up-and-down adjusting mechanism of a seat headrest and a seat. The up-and-down adjusting mechanism of the seat headrest comprises a backrest, the headrest, a movable seat, a mounting seat and a locking piece, a connecting cross beam is arranged at the top of the backrest; the mounting base comprises a top wall, a bottom wall and a rear side wall connected between the top wall and the bottom wall, the top wall is arranged above the connecting cross beam, the bottom wall is arranged below the connecting cross beam, a sliding groove extending in the vertical direction is formed in the rear side wall, and the movable base is mounted in the sliding groove so that the movable base can move relative to the mounting base in the vertical direction; the headrest is connected to the movable seat, and the locking piece is used for locking the movable seat and the mounting seat when the movable seat moves up and down relative to the mounting seat to a preset position; and the mounting seat is connected with the connecting cross beam through a connecting piece so as to fix the mounting seat on the connecting cross beam. The chair does not occupy the space of the backrest, so that the shape of the front side of the backrest can be matched with the back of a user, and the backrest is ensured to have better comfort.

Description

Technical Field

[0001] The utility model relates to the technical field of seats, in particular to a vertical adjustment mechanism for a seat headrest and a seat. Background Art

[0002] Traditional seats usually include a seat cushion and a backrest. The backrest is used to support the user's back, while the user's head and neck are suspended without support, resulting in poor comfort of the seat. To improve the defects of traditional seats, existing office seats, e-sports seats, etc. usually have a headrest configured at the top of the seat back. The headrest is used to support the user's head and neck to increase comfort. To adapt to different sitting postures of users and users with different body shapes, in some seats, the headrest is set to be vertically adjustable so that the headrest can be fixed at different height positions, and then provide better support for the user's head and neck. In the prior art, for a headrest with a vertical adjustment function, the headrest is connected to a movable seat, and a vertically extending sliding groove is provided on the seat back. The movable seat is embedded in the sliding groove. Since a vertically extending sliding groove needs to be provided on the seat back, the seat back needs to be a solid structure, or at least a longitudinally extending structure needs to be provided on the seat back to facilitate the opening of the sliding groove. This makes it difficult for the seat back to meet the requirements of ergonomics and affects the comfort of the seat. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a vertical adjustment mechanism for a seat headrest and a seat, which can ensure better comfort of the seat back on the basis of ensuring stable vertical adjustment of the headrest.

[0004] To achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The vertical adjustment mechanism for a seat headrest includes a seat back, a headrest, a movable seat, a mounting seat, and a locking member;

[0006] A connecting cross beam is provided at the top of the seat back; the mounting seat includes a top wall, a bottom wall, and a rear side wall connecting between the top wall and the bottom wall. The top wall is located above the connecting cross beam, the bottom wall is located below the connecting cross beam, and a vertically extending sliding groove is provided on the rear side wall. The movable seat is installed in the sliding groove so that the movable seat can move relative to the mounting seat in the vertical direction. The headrest is connected to the movable seat, and the locking member is used to lock the movable seat and the mounting seat when the movable seat moves relative to the mounting seat in the vertical direction to a predetermined position;

[0007] The top wall and / or the bottom wall of the mounting seat and the connecting cross beam are connected by a connecting member to fix the mounting seat to the connecting cross beam.

[0008] Preferably, the connecting cross beam includes a web, an upper wing plate, and a lower wing plate. The upper wing plate extends forward from the top of the web, and the lower wing plate extends forward from the bottom of the web; the top wall of the mounting seat presses against the upper surface of the upper wing plate, the bottom wall of the mounting seat presses against the lower surface of the lower wing plate, and the rear side wall of the mounting seat abuts against the rear side surface of the web.

[0009] Preferably, one side of the upper wing plate away from the web is suspended so that the upper wing plate forms a cantilever structure. A limiting rib extending downward is provided on the top wall of the mounting seat, and the limiting rib is placed on the front side of the upper wing plate.

[0010] Preferably, a positioning block protruding downward is provided on the lower surface of the lower wing plate, and a positioning groove is provided on the bottom wall of the mounting seat. The front end of the positioning groove extends to the front edge of the bottom wall to form a notch, so that the positioning block can be inserted into the mounting groove from front to back through the notch of the positioning groove.

[0011] Preferably, two connecting columns protruding upward are provided on the upper surface of the lower wing plate of the connecting cross beam. The two connecting columns are respectively arranged on both sides of the positioning block. Screw holes extending upward from the lower surface of the lower wing plate are provided on the connecting columns. Two connecting holes respectively facing the two screw holes are provided on the bottom wall of the mounting seat. The connecting piece is a connecting screw that passes through the two connecting holes and is screwed into the screw holes.

[0012] Preferably, the sliding groove includes a bottom surface and two side walls respectively located on both sides of the bottom surface. On the two side walls, retaining walls extending towards each other are respectively provided. Two convex ribs are respectively provided on the two side surfaces of the movable seat. A guide groove is formed between the two convex ribs, and the two retaining walls are respectively slidably inserted into the two guide grooves, so that the two convex ribs on the side surface of the movable seat are respectively located on the front and rear sides of the retaining wall.

[0013] Preferably, a mating surface facing the bottom surface of the sliding groove is provided on the movable seat. A plurality of positioning grooves arranged in the up-down direction are provided on the mating surface; the locking member includes a housing fixedly connected to the bottom surface of the sliding groove, a ball bead, and a spring. The housing is a hollow structure and an opening is formed at one end thereof facing the mating surface. The ball bead and the spring are both placed in the housing. The spring is used to provide an elastic stress for pushing the ball bead towards the mating surface, so that a part of the ball bead protrudes from the opening of the housing and is embedded into one of the positioning grooves.

[0014] Preferably, a guiding groove recessed backward is provided on the front side surface of the movable seat. The bottom surface of the guiding groove forms a mating surface. A guiding post protruding backward is provided on the bottom surface of the sliding groove. The guiding post is slidably inserted into the guiding groove, and the housing of the locking member is fixedly connected to the guiding post.

[0015] Preferably, a limiting boss is provided at the bottom of the mating surface. The limiting boss cooperates with the guiding post to limit the separation of the movable seat from the mounting seat when the movable seat moves upward relative to the mounting seat.

[0016] The seat includes the up-and-down adjustment mechanism of the above-mentioned seat headrest.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0018] In the present utility model, a mounting seat is fixedly installed on the connecting cross beam at the top of the backrest, so that the mounting seat and the backrest are relatively fixed. A sliding groove is provided on the rear side wall of the mounting seat, and the movable seat is slidably installed in the sliding groove. The movable seat and the mounting seat are locked by a locking member, so that the movable seat drives the headrest to keep its position fixed after moving up and down to a predetermined position, providing support for the user's head and neck. Since the mounting seat is fixed on the connecting cross beam at the top of the backrest, the space for the movable seat to slide up and down is arranged on the mounting seat, without occupying the space of the backrest, so that the shape of the front side of the backrest can conform to the user's back, that is, the structure for supporting the user's back on the front side of the backrest meets the requirements of ergonomics, ensuring that the backrest has better comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of the present utility model;

[0020] Figure 2 is a sectional view of the present utility model;

[0021] Figure 3 is Figure 2 the A-A sectional view of

[0022] Figure 4 is Figure 1 the schematic structural diagram of the movable seat in

[0023] Figure 5 is Figure 1 the schematic structural diagram of the mounting seat in

[0024] Figure 6 is Figure 1 the schematic structural diagram of the connecting cross beam in

[0025] Wherein: 10, backrest; 11, connecting cross beam; 111, web; 112, upper wing plate; 113, lower wing plate; 114, positioning block; 115, screw hole; 116, connecting column; 20, headrest; 30, movable seat; 301, mating surface; 31, clamping groove; 32, rib; 33, rib; 34, limiting boss; 35, guiding groove; 40, mounting seat; 41, rear side wall; 42, top wall; 421, limiting rib; 43, bottom wall; 431, positioning groove; 432, connecting hole; 44, sliding groove; 45, bottom surface; 46, side wall; 47, retaining wall; 48, guiding column; 50, locking member; 51, housing; 52, ball bead; 53, spring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] Next, in combination with the accompanying drawings and specific embodiments, the present utility model will be further described. It should be noted that, on the premise of non-conflict, the following-described embodiments or technical features can be arbitrarily combined to form new embodiments. Except as otherwise specifically stated, the materials and equipment used in this embodiment can be purchased from the market. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described by referring to the accompanying drawings are exemplary and are only used to explain the present application and should not be construed as a limitation to the present application.

[0027] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application. In the description of the present application, the meaning of "a plurality" is two or more, unless otherwise specifically and precisely defined.

[0028] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "connected", "communicated", "connected" should be understood in a broad sense. For example, it can be a fixed connection, or can be connected through an intermediate medium, and can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0029] Such as Figure 1 、 2, as shown in Figures 3, 4, 5, and 6, is an up-and-down adjustment mechanism for a seat headrest of the present utility model. It includes a backrest 10, a headrest 20, a movable seat 30, a mounting seat 40, and a locking member 50. The backrest 10 is located above the rear side of the seat cushion and is used to support the user's back. A connecting crossbeam 11 is provided at the top of the backrest 10. The mounting seat 40 includes a top wall 42, a bottom wall 43, and a rear side wall 41 connected between the top wall 42 and the bottom wall 43. The mounting seat 40 forms a structure with a C-shaped cross-section, and the opening of its C shape faces forward. The mounting seat 40 is placed on the connecting crossbeam 11 from back to front, with the top wall 42 above the connecting crossbeam 11, the bottom wall 43 below the connecting crossbeam 11, and the rear side wall 41 closely attached to the rear side of the connecting crossbeam 11. A chute 44 extending in the up-and-down direction is provided on the rear side of the rear side wall 41. The chute 44 penetrates the top and bottom of the rear side wall 41. The movable seat 30 is installed in the chute 44, enabling the movable seat 30 to move relative to the mounting seat 40 in the up-and-down direction. The headrest 20 is connected to the movable seat 30. The locking member 50 is used to lock the movable seat 30 and the mounting seat 40 when the movable seat 30 moves up and down relative to the mounting seat 40 to a predetermined position, so as to limit the degree of freedom of the movable seat 30 moving up and down relative to the mounting seat 40, thereby achieving the purpose of adjusting the headrest 20 up and down. The mounting seat 40 is connected to the connecting crossbeam 11 through a connecting member. For example, the bottom wall 43 of the mounting seat 40 can be connected to the connecting crossbeam 11 through a connecting member, or the top wall 42 of the mounting seat 40 can be connected to the connecting crossbeam 11 through a connecting member, or the bottom wall 43 and the top wall 42 of the mounting seat 40 can be simultaneously connected to the connecting crossbeam 11 by using a connecting member.

[0030] In the present utility model, the mounting seat 40 is fixedly installed on the connecting crossbeam 11 at the top of the backrest 10, so that the mounting seat 40 remains relatively fixed with respect to the backrest 10. A chute 44 is provided on the rear side wall 41 of the mounting seat 40, and the movable seat 30 is slidably installed in the chute 44. The movable seat 30 and the mounting seat 40 are locked by the locking member 50, so that the movable seat 30 drives the headrest 20 to keep its position fixed after moving up and down to a predetermined position, providing support for the user's head and neck. Since the mounting seat 40 is fixed on the connecting crossbeam 11 at the top of the backrest 10, the space for the movable seat 30 to slide up and down is provided on the mounting seat 40, without occupying the space of the backrest 10, enabling the shape of the front side of the backrest 10 to conform to the user's back, that is, the structure for supporting the user's back on the front side of the backrest 10 meets the requirements of ergonomics, ensuring that the backrest 10 has better comfort.

[0031] In a preferred embodiment, the connecting crossbeam 11 includes a web 111, an upper wing plate 112, and a lower wing plate 113, wherein the upper wing plate 112 extends forward from the top of the web 111, and the lower wing plate 113 extends forward from the bottom of the web 111, the top wall 42 of the mounting seat 40 is pressed against the upper surface of the upper wing plate 112, the bottom wall 43 of the mounting seat 40 is pressed against the lower surface of the lower wing plate 113, and the rear side wall 41 of the mounting seat 40 is abutted against the rear side surface of the web 111. Through the above structure, the mounting seat 40 can be tightly matched with the connecting beam 11. Specifically, when the mounting seat 40 is sleeved on the connecting beam 11 from back to front, the top wall 42 and the bottom wall 43 of the mounting seat 40 respectively press the upper wing plate 112 and the lower wing plate 113 of the connecting beam 11, so that the upper wing plate 112 and the lower wing plate 113 produce a certain deformation. The deformed upper wing plate 112 and the lower wing plate 113 produce elastic stress that presses the top wall 42 and the bottom wall 43, so that the mounting seat 40 can be stably fixedly matched with the connecting beam 11. On the connecting cross beam 11, one side of the upper wing plate 112 away from the web plate 111 is suspended, so that the upper wing plate 112 forms a cantilever structure. A limiting convex rib 421 extending downward is provided on the top wall 42 of the mounting seat 40. When assembling, the mounting seat 40 is sleeved on the connecting cross beam 11 from the rear side of the connecting cross beam 11. When the limiting convex rib 421 contacts the upper surface of the upper wing plate 112, the upper wing plate 112 of the cantilever structure is deformed downward to a certain extent. When the limiting convex rib 421 is placed on the upper wall 422 of the mounting seat 40, the upper wing plate 112 of the cantilever structure is deformed downward to a certain extent. When the upper wing plate 112 is in front of the upper wing plate 112, the upper wing plate 112 rebounds upward, so that the upper wing plate 112 is clamped on the rear side of the limiting rib 421. Through the elastic deformation characteristics of the upper wing plate 112, the limiting rib 421 can be clamped on the front side of the upper wing plate 112, and the matching clearance between the mounting seat 40 and the connecting beam 11 is eliminated as much as possible, making the matching between the two more firmly, and avoiding the mounting seat 40 shaking relative to the connecting beam 11, which causes the headrest 20 to swing when moving up and down.

[0032] A positioning block 114 protruding downward is provided on the lower surface of the lower wing plate 113. A positioning groove 431 is provided on the upper surface of the bottom wall 43 of the mounting seat 40. The extension of the positioning groove 431 to the front edge of the bottom wall 43 forms a notch. The positioning block 114 can slide into the positioning groove 431 from front to back through the notch of the positioning groove 431. When assembling the mounting seat 40 and the connecting cross beam 11 together, the positioning block 114 is inserted into the positioning groove 431 from the notch of the positioning groove 431. By using the cooperation of the positioning block 114 and the positioning groove 431, the degree of freedom of the mounting seat 40 moving in the extending direction of the connecting cross beam 11 is limited, further improving the stability of the cooperation between the mounting seat 40 and the connecting cross beam 11. Two connecting columns 116 protruding upward are provided on the upper surface of the lower wing plate 113 of the connecting cross beam 11. The two connecting columns 116 are respectively located on both sides of the positioning block 114. Screw holes 115 extending upward from the lower surface of the lower wing plate 113 are provided on the connecting columns 116. Two connecting holes 432 are provided on the bottom wall 43 of the mounting seat 40. The two connecting holes 432 are respectively and oppositely arranged below the two screw holes 115. The above-mentioned connecting pieces are used to fixedly connect the bottom wall 43 and the lower wing plate 113 together. Specifically, they are two connecting screws. The connecting screws pass through the connecting holes 432 and are screwed into the screw holes 115 to fix the mounting seat 40 and the connecting cross beam 11 together.

[0033] The above-mentioned sliding groove 44 includes a bottom surface 45 and two side walls 46. The two side walls 46 are respectively located on both sides of the bottom surface 45. On one side of the two side walls 46 away from the bottom surface 45, there are retaining walls 47 extending towards each other. Through the retaining walls 47, side walls 46 and bottom surface 45, the sliding groove 44 forms a C-shaped cross-section structure. On the side surface of the movable seat 30, there are rib 32 and rib 33, that is, one rib 32 and one rib 33 are provided on both sides of the movable seat 30. A guide groove is formed between the rib 32 and rib 33. When the movable seat 30 is matched with the mounting seat 40, the two retaining walls 47 are respectively slidably embedded in the guide grooves on both sides of the movable seat 30. The rib 32 and rib 33 are respectively located in front of and behind the retaining walls 47. Through the rib 32, rib 33, retaining walls 47 and bottom surface 45, the movable seat 30 and the mounting seat 40 are engaged with each other, and then the movable seat 30 can move up and down relative to the mounting seat 40 stably. On the movable seat 30, there is a mating surface 301 facing the bottom surface 45 of the sliding groove 44. On the mating surface 301, there are a plurality of latching grooves 31 arranged in the up and down direction. The locking member 50 includes a housing 51, a ball 52 and a spring 53. The housing 51 is fixedly connected to the bottom surface 45 of the sliding groove 44. The inside of the housing 51 is a hollow structure and one end facing the mating surface 301 forms an opening. The ball 52 and the spring 53 are both placed inside the housing 51. One end of the spring 53 abuts against the ball 52 and the other end abuts against the end of the housing 51 away from the opening. Using the elastic stress provided by the spring 53, the ball 52 is pushed towards the mating surface 301, so that a part of the ball 52 protrudes from the opening of the housing 51. The protruding part of the ball 52 is embedded into one of the latching grooves 31, and then the movable seat 30 and the mounting seat 40 are locked together by the ball 52. When it is necessary to adjust the up and down position of the headrest 20, an external force is applied to the headrest 20. The side of the latching groove 31 squeezes the ball 52, pushing the ball 52 towards the inside of the housing 51. The spring 53 contracts, so that the ball 52 disengages from the latching groove 31. When the headrest 20 is adjusted to an appropriate height, the ball 52 is embedded into the latching groove 31 at the corresponding position under the action of the elastic stress of the spring 53, and the movable seat 30 and the mounting seat 40 are locked again to complete the adjustment of the headrest 20.

[0034] A guiding groove 35 that is recessed backward is provided on the front side surface of the movable seat 30. The bottom surface of the guiding groove 35 forms a mating surface 301. A guiding post 48 that protrudes backward is provided on the bottom surface 45 of the sliding groove 44. The guiding post 48 is slidably embedded in the guiding groove 35. Through the cooperation of the guiding post 48 and the guiding groove 35, it further plays a guiding role in the up-and-down movement of the movable seat 30. The above-mentioned locking member 50 is installed on the guiding post 48. Specifically, the housing 51 of the locking member 50 is fixedly connected to the groove provided on the guiding post 48. A limiting boss 34 is provided at the bottom of the mating surface 301. The limiting boss 34 cooperates with the guiding post 48 to limit the maximum displacement of the movable seat 30 moving upward relative to the mounting seat 40. When the movable seat 30 moves upward to the maximum displacement, the limiting boss 34 abuts against the lower side of the guiding post 48. By the guiding post 48, the limiting boss 34 is limited from moving upward continuously, so as to limit the movable seat 30 from moving upward continuously, thereby preventing the headrest 20 from detaching from the mounting seat 40 when it is moved upward.

[0035] The seat of the present utility model includes the up-and-down adjustment mechanism of the above-mentioned seat headrest. The other structures of the seat are the same as those in the prior art and will not be described in detail here.

[0036] Finally, it should be noted that the above-mentioned embodiments are only optional embodiment modes of the present utility model and cannot be used to limit the protection scope of the present utility model. Any non-substantial changes and substitutions made by those skilled in the art based on the present utility model belong to the protection scope required by the present utility model.

Claims

1. The up and down adjustment mechanism of the seat headrest is characterized by: Including a backrest, a headrest, a movable seat, a mounting seat and a locking part; A connecting crossbeam is arranged on the top of the backrest; the mounting seat comprises a top wall, a bottom wall, and a rear side wall connected between the top wall and the bottom wall, the top wall is arranged above the connecting crossbeam, and the bottom wall is arranged below the connecting crossbeam, a slide groove extending in the up-down direction is arranged on the rear side wall, the movable seat is arranged in the slide groove so that the movable seat can move relative to the mounting seat in the up-down direction, the headrest is connected to the movable seat, and the locking member is used to lock the movable seat with the mounting seat when the movable seat moves up-down to a predetermined position relative to the mounting seat; The top wall and / or bottom wall of the mounting seat is connected to the connecting beam via a connecting piece to fix the mounting seat to the connecting beam.

2. The seat headrest up and down adjustment mechanism according to claim 1, characterized in that: The connecting crossbeam includes a web, an upper wing plate, and a lower wing plate. The upper wing plate extends forward from the top of the web, and the lower wing plate extends forward from the bottom of the web. The top wall of the mounting seat is pressed against the upper surface of the upper wing plate, the bottom wall of the mounting seat is pressed against the lower surface of the lower wing plate, and the rear side wall of the mounting seat is abutted against the rear side surface of the web.

3. The up and down adjustment mechanism of the seat headrest according to claim 2, characterized in that: One side of the upper wing plate away from the web plate is suspended to form a cantilever structure. A downwardly extending limiting rib is arranged on the top wall of the mounting seat, and the limiting rib is placed on the front side of the upper wing plate.

4. The up and down adjustment mechanism of the seat headrest according to claim 2, characterized in that: A downwardly protruding positioning block is provided on the lower surface of the lower wing plate, and a positioning groove is provided on the bottom wall of the mounting seat. The front end of the positioning groove extends to the front edge of the bottom wall to form a notch, so that the positioning block can be embedded in the mounting groove from front to back through the notch of the positioning groove.

5. The up and down adjustment mechanism of the seat headrest according to claim 4, characterized in that: The upper surface of the lower wing plate connecting the cross beam is provided with two upwardly protruding connecting columns, the two connecting columns are respectively arranged on both sides of the positioning block, the connecting columns are provided with screw holes extending upward from the lower surface of the lower wing plate, and the bottom wall of the mounting seat is provided with two connecting holes respectively facing the two screw holes, and the connecting piece is a connecting screw that passes through the two connecting holes and is screwed into the screw hole.

6. The seat headrest up and down adjustment mechanism according to claim 1, characterized in that: The slide groove includes a bottom surface and two side walls respectively located on both sides of the bottom surface. The two side walls are respectively provided with retaining walls extending toward each other. Two convex ribs are respectively provided on the two side surfaces of the movable seat, and a guide groove is formed between the two convex ribs. The two retaining walls are respectively slidably embedded in the two guide grooves so that the two convex ribs on the side surfaces of the movable seat are respectively located on the front and rear sides of the retaining wall.

7. The seat headrest up and down adjustment mechanism according to claim 6, characterized in that: The movable seat is provided with a mating surface facing the bottom surface of the slide groove, and the mating surface is provided with a plurality of locking grooves arranged in the up-down direction; the locking member comprises a shell fixedly connected to the bottom surface of the slide groove, a ball and a spring, the shell is a hollow structure and an opening is formed at one end thereof facing the mating surface, the ball and the spring are both placed in the shell, and the spring is used to provide an elastic stress for pushing the ball toward the mating surface, so that a part of the ball protrudes from the opening of the shell and is embedded in one of the locking grooves.

8. The seat headrest up and down adjustment mechanism according to claim 7, characterized in that: A guide groove recessed backward is arranged on the front side of the movable seat, the bottom surface of the guide groove forms a matching surface, a guide column protruding backward is arranged on the bottom surface of the slide groove, the guide column is slidably embedded in the guide groove, and the housing of the locking member is fixedly connected to the guide column.

9. The seat headrest up and down adjustment mechanism according to claim 8, characterized in that: A limiting boss is arranged at the bottom of the matching surface, and the limiting boss cooperates with the guide column to limit the movable seat from being separated from the mounting seat when the movable seat moves upward relative to the mounting seat.

10. A seat, characterized in that: A seat headrest up and down adjustment mechanism comprising the seat headrest according to any one of claims 1 to 9.

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