An electrically controlled gear shifting device, rest handle assembly and a speed change bicycle

Abstract

The utility model provides a kind of electric control gear shifting device, rest handlebar assembly and speed bicycle.The electric control gear shifting device has: mounting pedestal, it is configured as being suitable for being installed to the free end of the handlebar body main body;Electric control component, set in the mounting pedestal, it includes to control the upshift control portion of bicycle upshift and to control the downshift control portion of bicycle downshift;And operating member, movably connected in mounting pedestal, it includes the upshift operating portion corresponding to touch upshift control portion and the downshift operating portion corresponding to touch downshift control portion.Operating member is pivotally connected in mounting pedestal around setting axis, upshift operating portion and downshift operating portion are set in the upper and lower sides of setting axis, so that one of upshift operating portion and downshift operating portion can be operated by pressing action, another can be operated by up-pushing action.The utility model can realize the efficient and accurate control of upshift and downshift operation, while improving integration and ergonomics performance.

Description

Technical Field

[0001] This utility model relates to the field of bicycle technology, and in particular to an electronically controlled gear shifting device, axle handlebar assembly, and a multi-speed bicycle. Background Technology

[0002] With the development of electronic technology, electronic shifting systems have been gradually applied to high-end bicycles. Existing electronic shifting devices typically employ button or touch-sensitive designs, located on the handlebars for easy rider operation. In the bicycle industry, TT bikes are increasingly popular among cyclists. TT bikes, short for Time Trial Bike, were initially used primarily for individual or team time trials, but are now increasingly favored by everyday riders. A key feature of TT bikes is the presence of apron bars. When using apron bars, the rider can support their forearms on the pads and grip the front of the bars with both hands, leaning forward and lowering their back to near-horizontal, significantly reducing the frontal area exposed to the wind and lowering wind resistance. Furthermore, this posture allows some "rest" for the muscles in the back, shoulders, and neck. Currently, the shifting mechanism on TT bikes is primarily located on the main handlebars, while the apron bars typically do not have shifting functionality.

[0003] To address this, some existing technologies have incorporated shifting control devices on the axle handlebars. For example, Chinese invention patent CN106467159B discloses a bicycle electrical control device where the shifting control is located on the side of the axle handlebars and triggered by the rider's thumb. However, because the control device is located on the side and operated by the thumb, it cannot be too large. Furthermore, since both upshifting and downshifting require pressing, riders are prone to misoperation when pressing to shift gears; for instance, attempting to upshift might trigger a downshift. This results in insufficient human-computer interaction for the rider.

[0004] Therefore, it is necessary to propose a new technical solution to overcome the above-mentioned shortcomings. Utility Model Content

[0005] This utility model provides an electronically controlled gear shifting device, a rest handlebar assembly, and a geared bicycle. It adopts a brand-new operating component structure and movement mode to achieve efficient one-handed control of upshifting and downshifting operations, while improving the integration and ergonomic performance of the device.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: an electronically controlled shifting device, suitable for installation on a handlebar, the handlebar having a main body extending in the front-to-back direction, the electronically controlled shifting device having:

[0007] Mounting base, which is configured to be mounted to the free end of the handle body;

[0008] An electronic control component, disposed on the mounting base, includes an upshift control unit for controlling upshifting of the bicycle and a downshift control unit for controlling downshifting of the bicycle; and

[0009] An operating component is movably connected to the mounting base, and includes an upshifting operation part that triggers the upshifting control part and a downshifting operation part that triggers the downshifting control part.

[0010] The operating component is pivotally connected to the mounting base around a set axis, and the upshifting operation part and the downshifting operation part are located on the upper and lower sides of the set axis, so that one of the upshifting operation part and the downshifting operation part can be operated by pressing down and the other can be operated by flicking up.

[0011] Optionally, the mounting base has a front end portion away from the handle body, and the operating member is disposed on the front end portion of the mounting base.

[0012] Optionally, the upshift operation unit and the downshift operation unit located on the upper side of the setting axis are positioned further forward than the one located on the lower side of the setting axis.

[0013] Optionally, the middle part of the front end protrudes forward to form a central convex part, and the front end has recesses on the upper and lower sides of the central convex part for corresponding installation of the upshift operation part and the downshift operation part.

[0014] Optionally, the setting axis is arranged perpendicular to the central axis of the handle body, and the setting axis is defined by the central axis of the pivot shaft located at the central protrusion.

[0015] Optionally, the upshift control unit and the downshift control unit are both switch buttons, and the directions of the pressing force received by the two switch buttons when they are touched are not parallel.

[0016] Optionally, the electronic control component includes a circuit board having a first plate extending laterally and a second plate extending longitudinally, with the two switch buttons respectively disposed on the first plate and the second plate.

[0017] Optionally, a soft rubber part is provided between the operating component and the electronic control component. The soft rubber part is fixed to the mounting base. The operating component actuates the upshifting and downshifting operation parts by squeezing the soft rubber part to elastically deform.

[0018] Optionally, the mounting base includes a hollow outer shell and a bracket disposed within the outer shell, with one end of the bracket abutting against the second plate to form the blocking part.

[0019] Optionally, the first plate is provided with a battery holder, and the mounting base has a battery insertion port for inserting a button battery into the battery insertion port and electrically connecting it to the battery holder. The button battery is inserted into the mounting base by a bracket, and the bracket is screwed to the mounting base. The bracket has a cover portion that closes the battery insertion port.

[0020] The present invention also adopts the following technical solution: a rest handlebar assembly, which includes a handlebar body attached to the bicycle handlebar and an electronically controlled shifting device as described above.

[0021] The present invention also adopts the following technical solution: a variable speed bicycle, which includes the rest handlebar assembly as described above.

[0022] The electronically controlled gear shifting device provided by this utility model has an operating component pivotally connected to a mounting base around a set axis. The upshifting operation part and the downshifting operation part are located on the upper and lower sides of the set axis, so that one of the upshifting operation part and the downshifting operation part can be operated by pressing down, and the other can be operated by flicking up. Furthermore, when one of the upshifting operation part and the downshifting operation part is operated and touches its corresponding upshifting control part, the other moves away from its corresponding downshifting control part or upshifting control part. With this arrangement, the upper and lower operating parts and the non-parallel pressing direction significantly improve the accuracy of operation. This design fully considers functionality, human-machine interaction, and manufacturing feasibility. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly introduced below. Obviously, the drawings described below only involve some embodiments of this utility model, and are not intended to limit this utility model.

[0024] Figure 1 This is a perspective view of a double handlebar assembly according to an embodiment of the present invention.

[0025] Figure 2 This is a perspective view of a rest handle in one embodiment of the rest handle assembly of this utility model.

[0026] Figure 3 yes Figure 2 Exploded view of the component shown.

[0027] Figure 4 yes Figure 2 An exploded 3D view of the component shown from another perspective.

[0028] Figure 5 yes Figure 2 A perspective view of the electronic control components in the shown parts.

[0029] Figure 6 yes Figure 2 A perspective view of the operating components in the shown part.

[0030] Figure 7 yes Figure 2 A cross-sectional view of the component shown.

[0031] Explanation of reference numerals in the attached drawings: 10. Main body of the handlebars; 20. Electronic shifting device; 1. Mounting base; 11. Outer shell; 110. Battery insertion port; 111. Central protrusion; 112. Recess; 12. Soft rubber part; 13. Bracket; 131. Stopping part; 2. Electronic control component; 21. First plate; 211. Upshift control part; 22. Second plate; 221. Downshift control part; 23. Battery holder; 3. Operating component; 31. Pivoting part; 32. Downshifting operation part; 33. Upshifting operation part; 34. Return spring; 35. Pivoting shaft; 301. Protruding post; 4. Button battery; 41. Bracket; 5. Connector; 6. Cable. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings. The components of the embodiments of this utility model described and shown in the accompanying drawings can be arranged and designed in various different configurations. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0033] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0034] Unless otherwise defined, the technical or scientific terms used in this patent document shall have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model patent specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "an," "a," or "the" do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" indicate that the element or object preceding "comprising" encompasses the element or object listed following "comprising" or its equivalents, and do not exclude other elements or objects. Terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" are used only to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0035] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0036] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the features in the following embodiments can be combined with each other.

[0037] Please see Figures 1 to 7 As shown, this utility model discloses an electronically controlled gear shifting device, a lever arm rest assembly, and a bicycle with gears. The lever arm rest assembly is attached to the bicycle handlebars to provide support for the rider's arms. Figure 1 As shown, the rest levers are a pair, including a left lever and a right lever, which are symmetrically arranged. Both levers are equipped with an electronic shifting device 20. The electronic shifting device 20 on one lever is used, for example, to control the upshifting and downshifting of the rear derailleur, while the other is used, for example, to control the upshifting and downshifting of the front derailleur. Since the two levers are symmetrically arranged, this article mainly uses one lever as an example to describe its specific components.

[0038] like Figures 2 to 4As shown, the handlebar assembly includes a handlebar body 10 and an electronic shifting device 20. One end of the handlebar body 10 is attached to the bicycle handlebars, and the other end is a free end. The electronic shifting device 20 is disposed at the free end of the handlebar body 10. The electronic shifting device 20 has a mounting base 1, an electronic control component 2, and an operating member 3. The mounting base 1 is configured to be mounted to the free end of the handlebar body 10. The electronic control component 2 is disposed on the mounting base 1 and includes an upshift control unit 211 for controlling upshifting and a downshift control unit 221 for controlling downshifting. The operating member 3 is movably connected to the mounting base 1 and includes an upshift operating unit 33 corresponding to actuating the upshift control unit 211 and a downshift operating unit 32 corresponding to actuating the downshift control unit 221. The operating member 3 is pivotally connected to the mounting base 1 about a set axis R2. The upshifting operation part 33 and the downshifting operation part 32 are respectively disposed on the upper and lower sides of the set axis R2, such that one of the upshifting operation part 33 and the downshifting operation part 32 can be operated by pressing down, and the other can be operated by flicking up. Furthermore, when one of the upshifting operation part 33 and the downshifting operation part 32 is operated to activate its corresponding upshifting control part 211 or downshifting control part 221, the other moves away from its corresponding downshifting control part 221 or upshifting control part 211.

[0039] The rest handlebar assembly for a variable-speed bicycle provided by this utility model has an operating component 3 pivotally connected to a mounting base 1 around a set axis R2. An upshifting operating part 33 and a downshifting operating part 32 are respectively located on the upper and lower sides of the set axis, allowing one of them to be operated by pressing down and the other by flicking up. Furthermore, the upshifting and downshifting operating parts 33 and 32 move in a seesaw motion around the set axis R2. This arrangement, with its separate upper and lower operating parts and non-parallel pressing directions, clearly distinguishes the upshifting and downshifting actions, significantly improving operational accuracy and convenience. This design fully considers functionality, human-machine interface friendliness, and manufacturing feasibility.

[0040] like Figures 2 to 4 As shown, one end of the handlebar body 10 is fixed to the bicycle stem (not shown in the figure), and the other end is a free end. The handlebar body 10 can be detachably assembled to the bicycle stem, or it can be fixed to the bicycle stem in a non-detachable manner, such as by welding. Typically, a pair of axle handlebars is located between a pair of master handlebars. In this embodiment, the handlebar body 10 is a tube, with its central axis R1 extending in the front-rear direction, and the free end of the handlebar body 10 is the front end.

[0041] The electronic shifting device 20 is installed at the free end and includes a mounting base 1, an electronic control component 2, and an operating component 3. The mounting base 1 serves as the mounting carrier for components such as the electronic control component 2 and the operating component 3, with its front end extending away from the handlebar body 10 to form an operating area for the operating component 3. The mounting base 1 is installed to the handlebar body 10 via a connector 5. One end of the connector 5 can be inserted into the handlebar body 10, and the other end is connected to the mounting base 1 via screws, clips, or other structures. In this embodiment, the electronic control component 2 in the electronic shifting device 20 is connected to the derailleur via a cable 6, which passes through the connector 5 and enters the handlebar body 10. The electronic control component 2 is electrically connected to the bicycle's gear system via the cable 6, which runs through the interior of the handlebar body 10 to the frame, ensuring a clean appearance and preventing cable interference during riding. In other embodiments, the electronic shifting device 20 can also transmit control signals wirelessly, thus eliminating the need for the cable 6.

[0042] In this embodiment, the mounting base 1 has a front end portion away from the handlebar body 10, and the operating member 3 is disposed on the front end portion of the mounting base 1. With the operating member 3 positioned at the front end portion, the rider's hands are located at the front end portion of the handlebar body 10 during riding, providing greater flexibility for operation in the front area. This allows for easy operation with the thumb, index finger, and middle finger, and compared to having the operating member positioned on the side, it enables more diverse and convenient operating methods.

[0043] In this embodiment, the mounting base 1 comprises a hollow outer shell 11, a flexible rubber component 12, and a bracket 13. The outer shell 11 has a central convex portion 111 protruding forward from its front center. The upper and lower sides of the central convex portion 111 are respectively provided with recesses 112 to provide space for the installation and operation of the upshifting operation part 33 and the downshifting operation part 32 of the operating member 3. The flexible rubber component 12 is disposed between the operating member 3 and the electronic control component 2, and is fixed to the outer shell 11 of the mounting base 1. The operating member 3 actuates the upshifting operation part 33 and the downshifting operation part 32 by elastically deforming the flexible rubber component 12. The flexible rubber component 12 is an elastic rubber component that provides a seal, preventing liquids, dust, etc., from entering the interior of the mounting base 1 through the gap between the operating member 3 and the mounting base 1, thus protecting the electronic control component 2. The bracket 13 provides support for the installation of the electronic control component 2. The specific connection relationship and function between bracket 13 and electronic control component 2 will be described in detail later.

[0044] like Figures 3 to 5As shown, the electronic control component 2 is disposed inside the mounting base 1. The electronic control component 2 includes a circuit board, which has a first plate 21 extending laterally and a second plate 22 extending longitudinally. In this embodiment, the upshift control unit 211 and the downshift control unit 221 are respectively switch buttons, which are respectively disposed on the first plate 21 and the second plate 22, and the direction of the pressing force when touched is not parallel. Specifically, as... Figure 5 As shown, the circuit board is formed by vertically connecting a first plate 21 extending laterally and a second plate 22 extending longitudinally, creating an L-shaped structure. The first plate 21 has an upshift control section 211, which is a switch button located on the bottom surface of the first plate 21 and can be activated by upward pressure. The second plate 22 has a downshift control section 221, which is also a switch button located on the front side of the second plate 22 and can be activated by backward pressure. That is, the two switch buttons are not parallel in direction of pressure; in this embodiment, they are perpendicular.

[0045] Since the second plate 22 extends longitudinally, but its force is transverse, to prevent the second plate 22 from tilting or being damaged due to force displacement, in this embodiment, the mounting base 1 has a stop portion 131 located on the side of the second plate 22 opposite to the switch button disposed thereon. The stop portion 131 is supported on the back of the second plate 22, that is, the side opposite to the downshift control part 221. In this embodiment, the mounting base 1 includes a hollow outer shell 11 and a bracket 13 disposed within the outer shell 11. The bracket 13 is fixed inside the outer shell 11, and one end of the bracket 13 abuts against the second plate 22 to form the stop portion 131.

[0046] In this embodiment, a battery holder 23 is provided on the first plate 21, and the mounting base 1 has a battery insertion port 110 for inserting a button battery 4 through the battery insertion port 110 and electrically connecting it to the battery holder 23. Further, the button battery 4 is inserted into the mounting base 1 via a bracket 41. The bracket 41 has an insertion portion for holding the button battery 4 and a cover portion connected to one end of the insertion portion; the cross-section formed by the cover portion and the insertion portion is T-shaped. The insertion portion carries the button battery 4 into the battery holder 23, and the cover portion closes the battery insertion port 110. The bracket 41 is screwed to the mounting base 1; specifically, the screws pass through both ends of the cover portion to lock the bracket 41, the bracket 13, and the outer casing 11 together.

[0047] Please see Figures 2 to 4 and Figure 6As shown, the operating component 3 is pivotally connected to the central protrusion 111 of the mounting base 1 via a pivot shaft 35 about a setting axis R2. The setting axis R2 is perpendicular to the central axis of the handlebar body 10. The operating component 3 includes a pivot part 31, an upshifting operation part 33, and a downshifting operation part 32, with the two operation parts located on the upper and lower sides of the setting axis R2. The upshifting operation part 33 and the downshifting operation part 32 located on the upper side of the setting axis are positioned further forward than the one located on the lower side. The one on the upper side is usually activated by pressing down with the thumb, while the one on the lower side is mainly activated by flicking up with the index or middle finger. Therefore, positioning the one on the upper side further forward is more suitable for the hand posture during riding and conforms to ergonomics. Furthermore, the setting axis R2 is arranged perpendicular to the central axis R1 of the handlebar body 10, and the setting axis R2 is defined by the central axis of the pivot shaft 35 located at the central protrusion 111. Specifically, in this embodiment, the downshifting operation unit 32 is located on the upper side of the set axis, and the upshifting operation unit 33 is located on the lower side. This way, pressing down is downshifting and pulling up is upshifting, which better aligns with everyday thinking habits. The different actions of upshifting and downshifting make it easier for riders to distinguish between the operations. It should be noted that in other embodiments, the downshifting operation unit 32 can be located on the lower side and the upshifting operation unit 33 on the upper side. Furthermore, it should be noted that the "upper" and "lower" mentioned above are only relative relationships; in some embodiments, the upshifting and downshifting operation units can also be arranged diagonally upwards or downwards, or horizontally.

[0048] In this embodiment, the upshift operation unit 33 and the downshift operation unit 32 each have a protrusion 301 corresponding to the switch button, and the central axes of the two protrusions 301 are perpendicular. The perpendicularity of the central axes of the two protrusions 301 corresponds to the pressing direction of the two switch buttons, ensuring triggering reliability. A return spring 34 is respectively sleeved on the two protrusions 301. The return spring 34 provides elastic force to the operating member 3, so that the operating member 3 remains in the initial position when no force is applied.

[0049] Please see Figure 7 As shown, when the rider uses the aero handlebars, the rider's palm is positioned on the mounting base 1, with the thumb naturally drooping near the upper front end of the mounting base 1, and the other four fingers naturally curved near the lower front end of the mounting base 1. When the rider needs to shift up, the upshifting operation part 33 is pulled up, and the operation member 3 rotates clockwise around the pivot axis 35 (to... Figure 7(From a certain perspective), the protrusion 301 of the upshift operation unit 33 presses against the upshift control unit 211 on the first plate 21 through the soft rubber part 12, triggering an upshift signal. At this time, the downshift operation unit 32 moves away from the downshift control unit 221 on the second plate 22 as the operating member 3 rotates, avoiding accidental activation. Conversely, when the downshift operation unit 32 is pressed down, the operating member 3 rotates counterclockwise, the protrusion 301 of the downshift operation unit 32 triggers the downshift control unit 221, and at the same time, the upshift operation unit 33 moves away from the upshift control unit 211.

[0050] As described above in the specific embodiments, the electronic shifting device, axle handlebar assembly, and derailleur bicycle provided in this embodiment integrate the electronic shifting device 20 into the free end of the axle handlebar assembly. The unique design of the operating component 3 enables differentiated upshifting and downshifting operations, effectively preventing accidental activation and improving human-machine interface. Compared to existing technologies, the axle handlebar assembly in this embodiment integrates the shifting function into the front operating area, meeting the low-drag design requirements of TT bikes. The separate upper and lower operating sections and the non-parallel pressing direction significantly improve operational accuracy. This design fully considers functionality, human-machine interface, and manufacturing feasibility.

[0051] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. An electronically controlled gear shifting device, suitable for installation on a bicycle handlebar, the handlebar having a handlebar body extending in a front-to-back direction, characterized in that, The electronically controlled gear shifting device has the following features: Mounting base, which is configured to be mounted to the free end of the handle body; An electronic control component is disposed on the mounting base, and includes an upshift control unit for controlling upshifting of the bicycle and a downshift control unit for controlling downshifting of the bicycle. as well as An operating component is movably connected to the mounting base, and includes an upshifting operation part that triggers the upshifting control part and a downshifting operation part that triggers the downshifting control part. The operating component is pivotally connected to the mounting base around a set axis, and the upshifting operation part and the downshifting operation part are located on the upper and lower sides of the set axis, so that one of the upshifting operation part and the downshifting operation part can be operated by pressing down and the other can be operated by flicking up.

2. The electronically controlled gear shifting device as described in claim 1, characterized in that, The mounting base has a front end that is away from the handle body, and the operating member is disposed on the front end of the mounting base.

3. The electronically controlled gear shifting device as described in claim 1 or 2, characterized in that, The upshifting operation unit and the downshifting operation unit located on the upper side of the setting axis are positioned further forward than the one located on the lower side of the setting axis.

4. The electronically controlled gear shifting device as described in claim 2, characterized in that, The front end portion is convex forward to form a central convex portion, and the front end portion has recesses on the upper and lower sides of the central convex portion for corresponding installation of the upshift operation portion and the downshift operation portion.

5. The electronically controlled gear shifting device as described in claim 4, characterized in that, The setting axis is arranged perpendicular to the central axis of the handle body, and the setting axis is defined by the central axis of the pivot shaft located at the central protrusion.

6. The electronically controlled gear shifting device as described in claim 1 or 2, characterized in that, The upshift control unit and downshift control unit are both switch buttons, and the directions of the pressing force received by the two switch buttons when they are touched are not parallel.

7. The electronically controlled gear shifting device as described in claim 6, characterized in that, The electronic control component includes a circuit board, which has a first plate extending laterally and a second plate extending longitudinally, and the two switch buttons are respectively disposed on the first plate and the second plate.

8. The electronically controlled gear shifting device as described in claim 6, characterized in that, A soft rubber component is provided between the operating component and the electronic control component. The soft rubber component is fixed to the mounting base. The operating component activates the upshifting and downshifting operation parts by squeezing the soft rubber component to cause elastic deformation.

9. The electronically controlled gear shifting device as described in claim 7, characterized in that, The mounting base includes a hollow outer shell and a bracket disposed within the outer shell, with one end of the bracket abutting against the second plate to form the blocking part.

10. The electronically controlled gear shifting device as described in claim 7, characterized in that, The first plate is provided with a battery holder. The mounting base has a battery insertion port for inserting a button battery into the battery insertion port and electrically connecting it to the battery holder. The button battery is inserted into the mounting base by a bracket. The bracket is screwed to the mounting base and has a cover portion that closes the battery insertion port.

11. A rest handle assembly, characterized in that, It includes a handlebar body attached to the handlebars of a bicycle and an electronically controlled shifting device as described in any one of claims 1 to 10.

12. A multi-speed bicycle, characterized in that, Includes the rest handle assembly as described in claim 11.

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