Waist bridge jacking mechanism and operating bed

Abstract

The utility model is suitable for the technical field of medical equipment, and provides a waist bridge jacking mechanism and an operating bed, and the waist bridge jacking mechanism comprises a waist bridge plate; the lifting assembly comprises a lifting rod and a first transmission part in transmission connection with the lifting rod, and one end of the lifting rod is connected with the waist bridge plate; and the driving assembly comprises a driving shaft and a second transmission part arranged on the driving shaft, the second transmission part and the first transmission part are in axial staggered transmission, and the second transmission part abuts against the first transmission part. The driving shaft in the driving assembly rotates to drive the second transmission part arranged on the driving shaft to rotate, and then the first transmission part abutting against the second transmission part is driven to rotate, so that the lifting rod drives the waist bridge plate to ascend or descend. The second transmission part abuts against the first transmission part, so that the overall structure is more compact; and the second transmission part and the first transmission part are in axial staggered transmission, so that the settable position of the transmission shaft is increased, and the operation convenience is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical equipment, and in particular relates to a waist bridge lifting mechanism and an operating table. Background Art

[0002] The operating table is also commonly known as the operating table. It can support the patient during surgery and adjust the body position according to the needs of the surgical operation, providing a convenient operating environment for doctors. The operating table is a basic equipment in the operating room.

[0003] The lumbar bridge structure is a device commonly built into the operating table or operating bed. Its main purpose is to adjust the patient's surgical position so that medical staff can perform various operations or treatments. Among them, the common lumbar bridges include electric lumbar bridges, hydraulic lumbar bridges and mechanical lumbar bridges.

[0004] Mechanical waist bridge is a kind of bridge that is used more frequently because of its reliable and economical characteristics. However, most of the existing mechanical waist bridges are not compact enough, resulting in large space occupation and inconvenient operation. Utility Model Content

[0005] The utility model provides a waist bridge lifting mechanism, aiming to solve the problem that the waist bridge mechanism structure in the existing operating table is not compact enough, resulting in large occupied space and inconvenient operation.

[0006] In order to solve the above technical problems, in a first aspect, the utility model provides a waist bridge lifting mechanism, comprising:

[0007] Lumbar bridge board;

[0008] A lifting assembly, the lifting assembly comprising a lifting rod and a first transmission member transmission-connected to the lifting rod, one end of the lifting rod being connected to the waist bridge plate;

[0009] The driving assembly comprises a driving shaft and a second transmission member arranged on the driving shaft, the second transmission member and the first transmission member are axially staggered with each other, and the second transmission member abuts against the first transmission member.

[0010] Optionally, the lifting rod includes a first lifting rod and a second lifting rod, the first lifting rod is sleeved outside the second lifting rod, and the first lifting rod can move relative to the second lifting rod.

[0011] Optionally, the lifting rod is a screw rod.

[0012] Optionally, the first transmission member and the second transmission member are both helical gears, and the first transmission member and the second transmission member are arranged in a staggered axis helical gear transmission.

[0013] Optionally, the axial direction of the driving shaft and the axial direction of the lifting rod are perpendicular to each other.

[0014] Optionally, one lifting assembly is provided on each side of the waist bridge plate.

[0015] Optionally, the drive shaft is provided with two second transmission members, and the second transmission members are arranged in a one-to-one correspondence with the first transmission members.

[0016] Optionally, the drive assembly further includes a handle for rotating the drive shaft.

[0017] Optionally, the handle is detachably connected or fixedly connected to the drive shaft.

[0018] In a second aspect, the utility model provides an operating table comprising any one of the waist bridge lifting mechanisms described above.

[0019] Beneficial effects achieved by the utility model:

[0020] The lifting assembly in the waist bridge lifting mechanism provided by the utility model includes a lifting rod and a first transmission member connected to the lifting rod, one end of the lifting rod is connected to the waist bridge plate, and the driving shaft in the driving assembly rotates to drive the second transmission member arranged on the driving shaft to rotate, thereby driving the first transmission member abutting against the second rotating member to rotate, so that the lifting rod drives the waist bridge plate to lift or lower. The second transmission member abuts against the first transmission member, making the overall structure more compact; the second transmission member and the first transmission member are axially staggered transmissions, which increases the number of positions that can be set for the transmission shaft and improves the convenience of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the scheme in the utility model, a brief introduction is given below to the drawings required for use in the description of the embodiments of the utility model. Obviously, the drawings described below are some embodiments of the utility model. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 It is a structural schematic diagram of the lifting state of the waist bridge lifting mechanism provided by the embodiment of the utility model;

[0023] Figure 2 It is a structural schematic diagram of the waist bridge lifting mechanism provided by the embodiment of the utility model in the folded state;

[0024] Figure 3 It is a structural schematic diagram of a lifting assembly and a driving assembly in a waist bridge lifting mechanism provided by an embodiment of the utility model;

[0025] Figure 4 It is a cross-sectional schematic diagram of a lifting assembly and a driving assembly in a waist bridge lifting mechanism provided in an embodiment of the utility model.

[0026] Description of Main Reference Numerals:

[0027] 100, lumbar bridge lifting mechanism; 1, lumbar bridge plate; 2, lifting assembly; 21, first transmission member; 22, first lifting rod; 23, second lifting rod; 3, driving assembly; 31, driving shaft; 32, second transmission member; 33, handle. Detailed Implementation Manner

[0028] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0029] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "left", "right", "horizontal", "top", "bottom", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model 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 therefore cannot be understood as a limitation to the present utility model.

[0030] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of the present utility model, "a plurality" means two or more, unless otherwise specifically defined. In the description of the present utility model, "several" means one or more, unless otherwise specifically defined.

[0031] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection, an electrical connection or a communication connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0032] The lifting assembly in the waist bridge lifting mechanism provided by the embodiment of the utility model includes a lifting rod and a first transmission member connected to the lifting rod, one end of the lifting rod is connected to the waist bridge plate, and the driving shaft in the driving assembly rotates to drive the second transmission member arranged on the driving shaft to rotate, thereby driving the first transmission member abutting against the second rotating member to rotate, so that the lifting rod drives the waist bridge plate to lift or lower. The second transmission member abuts against the first transmission member, making the overall structure more compact; the second transmission member and the first transmission member are axially staggered and transmitted to each other, which increases the position where the transmission shaft can be set and improves the convenience of operation.

[0033] Embodiment 1

[0034] See also Figures 1 to 4 The waist bridge lifting mechanism provided by the embodiment of the utility model includes:

[0035] Waist bridge board 1;

[0036] A lifting assembly 2, the lifting assembly 2 comprises a lifting rod and a first transmission member 21 which is transmission-connected to the lifting rod, and one end of the lifting rod is connected to the waist bridge plate 1;

[0037] The driving assembly 3 includes a driving shaft 31 and a second transmission member 32 disposed on the driving shaft 31 . The second transmission member 32 and the first transmission member 21 are axially staggered for mutual transmission, and the second transmission member 32 abuts against the first transmission member 21 .

[0038] It can be understood that the lumbar bridge board 1 is generally a component used to support the patient's waist in an operating table. One end of a lifting rod is connected to the lumbar bridge board 1, and the lifting action of the lumbar bridge board 1 can be achieved through the lifting rod.

[0039] When the driving shaft 31 rotates, the second transmission member 32 disposed on the driving shaft 31 rotates along with the rotation of the driving shaft 31. The second transmission member 32 may be integrally disposed with the rotating shaft, or may be assembled to the driving shaft 31.

[0040] In this embodiment, the driving shaft 31 can be rotated by using an automatic device such as a motor to control the rotation of the driving shaft 31, or the driving shaft 31 can be rotated manually.

[0041] The second transmission member 32 and the first transmission member 21 are axially staggered and mutually transmitted, and the second transmission member 32 abuts against the first transmission member 21. In this way, the rotation of the second transmission member 32 can drive the rotation of the first transmission member 21. The first transmission member 21 is in transmission connection with the lifting rod, so that the rotation of the first transmission member 21 drives the lifting rod to rise or fall, thereby realizing the lifting action of the waist bridge plate 1.

[0042] Among them, the second transmission member 32 and the first transmission member 21 are axially staggered for transmission, and the second transmission member 32 abuts against the first transmission member 21. It can be understood that the first transmission member 21 and the second transmission member 32 abut against each other, and the axial direction of the first transmission member 21 when rotating is not parallel to the axial direction of the second transmission member 32 when rotating. In this way, the first transmission member 21 is driven by the second transmission member 32 to move, thereby realizing a change in transmission direction.

[0043] Specifically, the second transmission member 32 abuts against the first transmission member 21, and the second transmission member 32 and the first transmission member 21 are axially staggered for transmission. Such a first transmission member 21 and the second transmission member 32 can be a combination of a worm gear, a combination of two helical gears, a combination of hyperbolic gears, or other suitable matching methods.

[0044] The lifting assembly 2 in the waist bridge lifting mechanism 100 provided by the embodiment of the utility model includes a lifting rod and a first transmission member 21 connected to the lifting rod. One end of the lifting rod is connected to the waist bridge plate 1. The driving shaft 31 in the driving assembly 3 rotates, driving the second transmission member 32 arranged on the driving shaft 31 to rotate, thereby driving the first transmission member 21 abutting against the second rotating member to rotate, so that the lifting rod drives the waist bridge plate 1 to lift or lower. The second transmission member 32 abuts against the first transmission member 21, making the overall structure more compact; the second transmission member 32 and the first transmission member 21 are axially staggered transmissions, which increases the position of the transmission shaft that can be set and improves the convenience of operation.

[0045] Embodiment 2

[0046] See also Figure 1 , Figure 3 and Figure 4 The lifting rod of the waist bridge lifting mechanism 100 provided in the embodiment of the utility model includes a first lifting rod 22 and a second lifting rod 23. The first lifting rod 22 is sleeved outside the second lifting rod 23, and the first lifting rod 22 can move relative to the second lifting rod 23.

[0047] It can be understood that the lifting rod includes a first lifting rod 22 and a second lifting rod 23. The lifting stroke can be increased or decreased through the relative movement of the first lifting rod 22 and the second lifting rod 23, so as to meet the needs of different surgeries or treatments. That is, the lifting rod can be a single rod or a combination of multiple rods.

[0048] Specifically, Figure 2As shown, when the lifting rod is configured such that the first lifting rod 22 is sleeved outside the second lifting rod 23, the second lifting rod 23 can be received within the first lifting rod 22. In this way, when the height of the lifting assembly 2 is fixed, by configuring the lifting rod to include the first lifting rod 22 and the second lifting rod 23, the liftable stroke of the lifting assembly 2 can be increased.

[0049] More specifically, the height of the lifting assembly 2 can also be reduced by further increasing the number of lifting rods, such as adding a third lifting rod, a fourth lifting rod, etc. In addition, the first lifting rod 22 can be connected in other segmented link ways in the prior art, in addition to being sleeved outside the second lifting rod 23.

[0050] Embodiment Three

[0051] Please refer to Figure 3 and Figure 4 In the waist bridge lifting mechanism 100 provided by the embodiment of the present utility model, the lifting rod of the lifting assembly 2 is a lead screw.

[0052] A lead screw is a commonly used transmission element, which has the advantages of high precision, smooth transmission, wear resistance, etc. Using a lead screw as the lifting rod can conveniently realize the lifting action of the waist bridge plate 1, and can ensure the stability and precision during the transmission process. In addition, the lead screw transmission method can also be conveniently installed and disassembled, thus facilitating maintenance and replacement.

[0053] Specifically, both the first lifting rod 22 and the second lifting rod 23 are lead screws. In this way, when the drive shaft 31 rotates, the second transmission member 32 on the drive shaft 31 rotates accordingly, and then the second transmission member 32 drives the first transmission member 21 to rotate. The up and down direction of the first transmission member 21 can be fixed. Then, the first lifting rod 22 cooperating with the first transmission member 21 is driven to extend. After being fully extended, the limiting groove on the first lifting rod 22 fixes it to the first transmission member 21, and together they drive the second lifting rod 23 to extend to the maximum length and stop. When the drive shaft 31 rotates in the reverse direction, it drives the second transmission member 32 to rotate. The second transmission member 32 drives the first transmission member 21 to rotate, and then drives the second lifting rod 23 to descend and retract. When the second lifting rod 23 descends to the bottom, the second lifting rod 23 and the first transmission member 21 rotate in the reverse direction together, and continue to drive the first lifting rod 22 to retract in the reverse direction until it is fully lowered.

[0054] Of course, the lifting rod of the present application can be a lead screw, or can also be a threaded rod or other rod bodies that can achieve the same or similar functions.

[0055] Embodiment Four

[0056] Please refer to Figure 3 and Figure 4, in the waist bridge lifting mechanism 100 provided by the embodiment of the present utility model, both the first transmission member 21 and the second transmission member 32 are helical gears, and the first transmission member 21 and the second transmission member 32 are arranged for crossed-axis helical gear transmission.

[0057] It can be understood that such a configuration can achieve axial crosswise transmission, thereby changing the transmission direction, and can also increase the stability and reliability of the mechanism. This can avoid problems such as the lead screw running off track easily occurring in traditional lead screw transmissions, and improve the transmission accuracy and smoothness.

[0058] In addition, helical gear transmission has the advantages of high precision, high smoothness and low noise, which can ensure the transmission stability and accuracy of the waist bridge lifting mechanism 100. Crossed-axis helical gear transmission can increase the transmission efficiency and load-bearing capacity of the mechanism, and at the same time can reduce friction and wear during the transmission process. By adopting two-stage helical gear transmission, the rigidity and durability of the mechanism can be increased, so as to better meet the working requirements of high strength and long time.

[0059] Embodiment Five

[0060] Please refer to Figure 3 and Figure 4 , in the waist bridge lifting mechanism 100 provided by the embodiment of the present utility model, the axial direction of the drive shaft 31 is perpendicular to the axial direction of the lifting rod.

[0061] It can be understood that this can increase the transmission efficiency and stability of the mechanism. By arranging the drive shaft 31 perpendicular to the axial direction of the lifting rod, the transmission between the drive shaft 31 and the lifting rod can be made more direct and efficient. In addition, the design of perpendicular arrangement can also increase the rigidity and load-bearing capacity of the mechanism, so as to better meet the requirements of different surgeries or treatments.

[0062] In addition, this design of perpendicular arrangement can also achieve a more flexible transmission mode. For example, the drive shaft 31 can adopt an electric or pneumatic mode, while the lifting rod can adopt a lead screw transmission mode. This combination can achieve efficient, stable and precise lifting actions, and is convenient for installation and disassembly at the same time.

[0063] Embodiment Six

[0064] Please refer to Figure 1 and 2 , in the waist bridge lifting mechanism 100 provided by the embodiment of the present utility model, a lifting assembly 2 is provided on each side of the waist bridge plate 1.

[0065] It can be understood that providing a lifting assembly 2 on each side of the waist bridge plate 1 makes the waist bridge plate 1 more stable during the lifting process, and the simultaneous action of the lifting assemblies 2 on both sides can ensure the levelness of the waist bridge plate 1, and avoid tilting or instability during the lifting process.

[0066] Specifically, the two lifting components 2 can be symmetrically arranged on the waist bridge plate 1.

[0067] Meanwhile, arranging the lifting components 2 on both sides can also increase the adjustment range of the lifting stroke, enabling the waist bridge lifting mechanism 100 to adapt to operating tables or surgical requirements of different heights and angles. By adjusting the relative positions of the lifting components 2 on both sides, the tilt angle of the waist bridge plate 1 can also be adjusted, further increasing the flexibility and adaptability of the mechanism.

[0068] This design takes into account the stability and adjustment requirements during the surgical process. The lifting components 2 on both sides provide better support and adjustment functions, enabling the waist bridge lifting mechanism 100 to better meet the requirements of surgery or treatment. Of course, if there are other requirements, more lifting components 2 can be added to the waist bridge plate 1.

[0069] Embodiment Seven

[0070] Please refer to Figure 1 and Figure 2 In the waist bridge lifting mechanism 100 provided by the embodiment of the present utility model, two second transmission members 32 are provided on the driving shaft 31, and the second transmission members 32 are arranged in one-to-one correspondence with the first transmission members 21. That is, it can be understood that in this embodiment, the same driving shaft 31 can be used to control the two lifting components 2 to lift or lower simultaneously.

[0071] Specifically, when one lifting component 2 is provided on each side of the waist bridge plate 1, each lifting component 2 is provided with a first transmission member 21. At this time, the driving shaft 31 can be extended, and second transmission members 32 corresponding to each first transmission member 21 are arranged on the driving shaft 31. Two second transmission members 32 are arranged corresponding to the two first transmission members 21. In this way, when the driving shaft 31 rotates, the second transmission members 32 arranged on the driving shaft 31 rotate accordingly, and drive the corresponding first transmission members 21 to rotate together, thereby enabling the two lifting components 2 to lift or lower simultaneously.

[0072] It can be understood that by adopting the setting method of one-to-one correspondence between the second transmission members 32 and the first transmission members 21, the stability and reliability of the mechanism can be increased. Each lifting component 2 has an independent transmission member for driving, which can ensure the smoothness and accuracy during the lifting or lowering process. At the same time, this design can also achieve a more flexible transmission method, such as driving the driving shaft 31 and the second transmission members 32 through an electric or pneumatic method to control the actions of the two lifting components 2.

[0073] Embodiment Eight

[0074] Please refer to Figure 1 The driving component 3 provided by the embodiment of the present utility model further includes a handle 33 for rotating the driving shaft 31.

[0075] It is understandable that configuring the handle 33 to rotate the drive shaft 31 can facilitate medical staff to manually control the operation of the lumbar bridge lifting mechanism 100 through the handle 33, thereby realizing convenient operation of the operating table or the operating room.

[0076] Of course, the handle 33 is not limited to manual operation only, and the drive shaft 31 can also be rotated automatically by configuring corresponding automatic equipment.

[0077] Specifically, the handle 33 can be arranged outside or inside the drive shaft 31, and the drive shaft 31 can be rotated by rotating or pulling the handle 33, thereby controlling the lifting action of the lifting assembly 2. This manual control method can meet the needs of different surgeries or treatments and facilitate medical staff to perform precise adjustments and operations.

[0078] Among them, when the handle 33 is arranged on the side of the lumbar bridge lifting mechanism 100, it is generally more convenient to adjust the state of the lumbar bridge plate 1 during the operation.

[0079] Embodiment Nine

[0080] Please refer to Figure 1 , the handle 33 provided in the embodiment of the present utility model is detachably connected or fixedly connected to the drive shaft 31.

[0081] The handle 33 is detachably connected to the drive shaft 31. In this way, when the position where the handle 33 is set may hinder clinical work, the handle 33 can be removed to increase the convenience of clinical work.

[0082] It can be understood that the handle 33 is set to be detachable for convenient replacement or maintenance when necessary. At the same time, the handle 33 can also be provided with adjusting devices, such as angle adjusters or stroke adjusters, etc., to facilitate adjustment according to the surgical needs.

[0083] Among them, the detachable connection means that the handle 33 and the drive shaft 31 can be disassembled in a certain way, such as by threaded connection, pin connection, bayonet connection, etc. This method is convenient for replacing the handle 33 when problems occur, and is also convenient for assembly and disassembly during manufacturing and maintenance.

[0084] The fixed connection means that the handle 33 and the drive shaft 31 are fixed by means of welding, gluing, rivet connection, etc. and cannot be disassembled. This method can increase the stability and reliability of the mechanism and is suitable for some occasions that need to be used for a long time and are not easy to be disassembled frequently.

[0085] According to different usage requirements and occasions, a suitable connection method of the handle 33 and the drive shaft 31 can be selected.

[0086] Embodiment Ten

[0087] The embodiment of the utility model further provides an operating table, comprising the waist bridge lifting mechanism 100 in any of the above embodiments.

[0088] The lifting assembly 2 in the waist bridge lifting mechanism 100 in the operating bed provided by the embodiment of the utility model includes a lifting rod and a first transmission member 21 connected to the lifting rod. One end of the lifting rod is connected to the waist bridge plate 1. The driving shaft 31 in the driving assembly 3 rotates, driving the second transmission member 32 arranged on the driving shaft 31 to rotate, thereby driving the first transmission member 21 abutting against the second rotating member to rotate, so that the lifting rod drives the waist bridge plate 1 to lift or lower. The second transmission member 32 abuts against the first transmission member 21, making the overall structure more compact; the second transmission member 32 and the first transmission member 21 are axially staggered transmissions, which increases the position where the transmission shaft can be set and improves the convenience of operation.

[0089] The operating table using the waist bridge lifting mechanism 100 can reduce the space occupied by the waist bridge lifting mechanism 100 on the operating table, and the saved space can be used to configure other mechanisms of the operating table.

[0090] The waist bridge lifting mechanism 100 with a compact structure generally also reduces manufacturing costs.

[0091] Through the handle 33 or other control components, medical staff can conveniently control the action of the waist bridge lifting mechanism 100 to achieve fast and accurate adjustment. The use of high-precision transmission parts and structural design can increase the stability and reliability of the operating table and reduce errors and jitters during operation.

[0092] In addition, by adjusting the lifting stroke and tilt angle of the waist bridge lifting mechanism 100, the operating table can also be customized and manufactured according to different usage requirements and occasions to meet the needs of different medical institutions and patients. It is understandable that those skilled in the art can combine various implementations in the above embodiments under the guidance of the above embodiments to obtain technical solutions of multiple implementations.

[0093] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A waist bridge lifting mechanism, characterized in that: include: Lumbar bridge board; A lifting assembly, the lifting assembly comprising a lifting rod and a first transmission member transmission-connected to the lifting rod, one end of the lifting rod being connected to the waist bridge plate; The driving assembly comprises a driving shaft and a second transmission member arranged on the driving shaft, the second transmission member and the first transmission member are axially staggered with each other, and the second transmission member abuts against the first transmission member.

2. The waist bridge lifting mechanism according to claim 1, characterized in that: The lifting rod comprises a first lifting rod and a second lifting rod, wherein the first lifting rod is sleeved outside the second lifting rod, and the first lifting rod can move relative to the second lifting rod.

3. The waist bridge lifting mechanism according to claim 1 or 2, characterized in that: The lifting rod is a screw rod.

4. The waist bridge lifting mechanism according to claim 1, characterized in that: The first transmission member and the second transmission member are both helical gears, and the first transmission member and the second transmission member are arranged in a staggered axis helical gear transmission.

5. The waist bridge lifting mechanism according to claim 4, characterized in that: The axial direction of the driving shaft is perpendicular to the axial direction of the lifting rod.

6. The waist bridge lifting mechanism according to claim 1, characterized in that: A lifting assembly is respectively provided on both sides of the waist bridge plate.

7. The waist bridge lifting mechanism according to claim 6, characterized in that: The driving shaft is provided with two second transmission members, and the second transmission members are arranged in one-to-one correspondence with the first transmission members.

8. The waist bridge lifting mechanism according to claim 1, characterized in that: The drive assembly also includes a handle for rotating the drive shaft.

9. The waist bridge lifting mechanism according to claim 8, characterized in that: The handle is detachably connected or fixedly connected to the driving shaft.

10. An operating table, characterized in that: It comprises a waist bridge lifting mechanism as described in any one of claims 1 to 9.

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