Cleaning equipment control method and device, cleaning equipment and storage medium

Abstract

The invention relates to a control method and device of cleaning equipment, the cleaning equipment and a storage medium. The method comprises the steps that in response to the situation that the cleaning equipment is in a first mode, whether a first key of the cleaning equipment enters a pressed state or not is determined; in response to the fact that the first key enters the pressing state, obtaining the pressing duration of the first key; and according to the pressing duration, the suction force of the cleaning equipment is adjusted. According to the technical scheme, the suction force of the cleaning equipment can be adjusted according to the pressing duration after the first key enters the pressing state. The cleaning equipment can be prevented from being in an unconventional working mode for a long time, the available time of single charging of the cleaning equipment is prolonged, and the user experience is improved.

Description

Technical Field

[0001] The present disclosure relates to the field of smart homes, and in particular to a control method and device for cleaning equipment, cleaning equipment, and a storage medium. Background Art

[0002] In the related art, when a user uses a rechargeable wireless cleaning device, if the user needs to increase the suction power of the cleaning device, the user needs to switch the working mode of the cleaning device to a mode corresponding to high suction power. If the user switches to the mode corresponding to high suction power but does not switch back to the normal working mode in time, the power consumption of the cleaning device will be accelerated, shortening the operating time of the cleaning device. Summary of the invention

[0003] In order to overcome the problems existing in the related art, the present disclosure provides a control method and device of a cleaning device, a cleaning device and a storage medium.

[0004] According to a first aspect of an embodiment of the present disclosure, a control method for a cleaning device is provided, comprising: in response to the cleaning device being in a first mode, determining whether a first button of the cleaning device enters a pressed state; in response to the first button entering a pressed state, obtaining a pressing duration of the first button; and adjusting a suction force of the cleaning device according to the pressing duration.

[0005] In one implementation, adjusting the suction force of the cleaning device according to the pressing duration includes: increasing the suction force of the cleaning device in response to the pressing duration being greater than or equal to a first duration threshold.

[0006] In an optional implementation, the method further includes: in response to the suction force of the cleaning device increasing to a first target suction force, maintaining the suction force of the cleaning device at the first target suction force unchanged.

[0007] In an optional implementation, the method further includes: in response to the pressing time being greater than a second time threshold, increasing the suction force of the cleaning device again; wherein the second time threshold is greater than the first time threshold.

[0008] Optionally, the method further includes: in response to the first button exiting a pressing state, restoring the suction force of the cleaning device to the suction force corresponding to the first mode.

[0009] In one implementation, the method further includes: determining that the first button exits the pressing state before the pressing time reaches the first time threshold, and switching the cleaning device from the first mode to the second mode.

[0010] In an optional implementation, the first mode and the second mode are different, and the first mode and the second mode are any one of the following: a standard mode; a water absorption mode; a sterilization mode.

[0011] In one implementation, the cleaning device is a floor scrubber.

[0012] According to a second aspect of an embodiment of the present disclosure, a control device for a cleaning device is provided, the device comprising: a first processing module, for determining whether a first button of the cleaning device enters a pressed state in response to the cleaning device being in a first mode; a second processing module, for obtaining a pressing duration of the first button in response to the first button entering a pressed state; and a first control module, for adjusting the suction force of the cleaning device according to the pressing duration.

[0013] In one implementation, the first control module is specifically configured to: in response to the pressing duration being greater than or equal to a first duration threshold, increase the suction force of the suction motor of the cleaning device.

[0014] In an optional implementation, the first control module is further configured to: in response to the suction force of the cleaning device increasing to the first target suction force, maintain the suction force of the cleaning device at the first target suction force. In an optional implementation, the device further comprises: a second control module, configured to increase the suction force of the suction motor of the cleaning device again in response to the pressing time being greater than a second time threshold; wherein the second time threshold is greater than the first time threshold.

[0015] Optionally, the device further comprises: a third control module, configured to restore the suction force of the cleaning device to the suction force corresponding to the first mode in response to the first button exiting the pressing state.

[0016] In an optional implementation, the apparatus further includes: a fourth control module, configured to determine that the first button exits the pressing state before the pressing time reaches the first time threshold, and to switch the cleaning device from the first mode to the second mode.

[0017] Optionally, the first mode and the second mode are different, and the first mode and the second mode are any one of the following: standard mode; water absorption mode; sterilization mode.

[0018] In one implementation, the cleaning device is a floor scrubber.

[0019] According to a third aspect of an embodiment of the present disclosure, a cleaning device is provided, comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the method described in the first aspect above.

[0020] According to a fourth aspect of an embodiment of the present disclosure, a non-transitory computer-readable storage medium storing computer instructions is provided, wherein the computer instructions are used to enable the computer to execute the method as described in the first aspect above.

[0021] According to a fifth aspect of an embodiment of the present disclosure, the present disclosure provides a computer program product, including a computer program, which implements the steps of the method described in the first aspect when executed by a processor.

[0022] The technical solution provided by the embodiments of the present disclosure may include the following beneficial effects: when the cleaning device is in the first mode, the suction force of the cleaning device can be adjusted according to the pressing time after the first button enters the pressing state, and after the first button exits the pressing state, the suction force of the suction motor is restored to the suction force corresponding to the first mode. This can prevent the cleaning device from being in an unconventional working mode for a long time, increase the usable time of a single charge of the cleaning device, and thus improve the user experience.

[0023] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0025] Figure 1 The figure is a flow chart of a method for controlling a cleaning device according to an exemplary embodiment.

[0026] Figure 2 is a flow chart of another method for controlling a cleaning device according to an exemplary embodiment.

[0027] Figure 3 is a schematic diagram showing a control scheme of a cleaning device according to an exemplary embodiment.

[0028] Figure 4 is a block diagram of a control device for a cleaning device according to an exemplary embodiment.

[0029] Figure 5is a block diagram of another control device for cleaning equipment according to an exemplary embodiment.

[0030] Figure 6 is a block diagram of yet another control device for a cleaning device according to an exemplary embodiment.

[0031] Figure 7 is a block diagram of yet another control device for a cleaning device according to an exemplary embodiment.

[0032] Figure 8 is a block diagram of a cleaning device according to an exemplary embodiment. DETAILED DESCRIPTION

[0033] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are merely examples of devices and methods consistent with some aspects of the present invention as detailed in the appended claims.

[0034] The various numerical numbers such as first and second involved in the present disclosure are only for the convenience of description and are not used to limit the scope of the embodiments of the present disclosure, nor do they indicate the order of precedence.

[0035] Figure 1 is a flow chart of a method for controlling a cleaning device according to an exemplary embodiment. Figure 1 As shown, the method may include but is not limited to the following steps.

[0036] Step S101: In response to the cleaning device being in the first mode, determining whether a first button of the cleaning device is in a pressed state.

[0037] In the embodiments of the present disclosure, the cleaning device may be a rechargeable wireless cleaning device, such as a wireless vacuum cleaner, a wireless floor scrubber, and the like.

[0038] In the embodiment of the present disclosure, the first mode may be any one of a plurality of preset working modes of the cleaning device.

[0039] In the embodiment of the present disclosure, the first button may be any button on the cleaning device, or the first button may be a preset button on the cleaning device.

[0040] For example, in response to the cleaning device being in the first mode, it is determined whether a first button of the cleaning device is pressed by a user to enter a pressed state.

[0041] Among them, in the embodiments of the present disclosure, terms such as "key" and "button" can be replaced with each other.

[0042] Step S102: in response to the first key entering a pressed state, obtaining a pressing duration of the first key.

[0043] For example, in response to a first button being pressed by a user, the cleaning device enters a pressing state, and the pressing time duration of the first button by the user is acquired.

[0044] Step S103: adjusting the suction force of the cleaning device according to the pressing time.

[0045] For example, the cleaning device gradually increases the suction of the suction motor of the cleaning device according to the duration for which the user presses the first button.

[0046] By implementing the disclosed embodiment, when the cleaning device is in the first mode, the suction force of the cleaning device can be adjusted according to the pressing time of the first button, so as to avoid the cleaning device being in an unconventional working mode for a long time, increase the usable time of a single charge of the cleaning device, and thus improve the user experience.

[0047] In one implementation, the specific method of adjusting the rotation speed of the suction motor of the cleaning device can be determined based on whether the pressing time of the first button is greater than a preset time threshold. Figure 2 , Figure 2 is a flow chart of another method for controlling a cleaning device according to an exemplary embodiment. Figure 2 As shown, the method may include but is not limited to the following steps.

[0048] Step S201: In response to the cleaning device being in the first mode, determining whether a first button of the cleaning device is in a pressed state.

[0049] In the embodiments of the present disclosure, step S201 may be implemented in any manner in the embodiments of the present disclosure, and the embodiments of the present disclosure do not limit this and will not be described in detail.

[0050] Step S202: in response to the first key entering a pressed state, obtaining a pressing duration of the first key.

[0051] In the embodiments of the present disclosure, step S202 may be implemented in any manner in the embodiments of the present disclosure, and the embodiments of the present disclosure do not limit this and will not be described in detail.

[0052] Step S203: In response to the pressing time being greater than or equal to the first time threshold, increasing the suction force of the cleaning device.

[0053] For example, in response to the user pressing the first button for a period of time greater than or equal to a first period threshold (eg, 3 seconds), the cleaning device increases the rotation speed of the suction motor, thereby increasing the suction of the cleaning device.

[0054] In an optional implementation, the method further includes: in response to the suction force of the cleaning device increasing to a first target suction force, maintaining the suction force of the cleaning device at the first target suction force unchanged.

[0055] In response to the user pressing the first button for a duration greater than or equal to a first duration threshold, the cleaning device increases the rotation speed of the suction motor to a preset first target rotation speed, increases the suction force of the cleaning device to the first target suction force, and maintains the rotation speed of the suction motor at the first target rotation speed, thereby maintaining the suction force of the cleaning device at the first target suction force.

[0056] In an optional implementation, the method further includes: in response to the pressing time being greater than a second time threshold, increasing the suction force of the cleaning device again. In the embodiment of the present disclosure, the second time threshold is greater than the first time threshold.

[0057] For example, in response to the user pressing the first button for a duration greater than or equal to the first duration threshold, the cleaning device increases the rotation speed of the suction motor to increase the suction of the cleaning device. If the user continues to press the first button and the pressing duration is greater than or equal to the second duration threshold (e.g., 8 seconds), the cleaning device increases the rotation speed of the suction motor again to increase the suction of the cleaning device again.

[0058] In some embodiments of the present disclosure, the method may further include: in response to the suction force of the cleaning device increasing to the second target suction force, maintaining the suction force of the cleaning device at the second target suction force unchanged.

[0059] For example, in response to the user pressing the first button for a duration greater than or equal to the first duration threshold, the cleaning device increases the rotation speed of the suction motor to a preset first target rotation speed, so that the suction of the cleaning device reaches the first target suction, and maintains the rotation speed of the suction motor at the target rotation speed, thereby maintaining the suction of the cleaning device at the first target suction. If the user continues to press the first button and the pressing duration is greater than or equal to the second duration threshold, the cleaning device again increases the rotation speed of the suction motor to a preset second target rotation speed, so that the suction of the cleaning device reaches the second target suction, and maintains the rotation speed of the suction motor at the second target rotation speed, thereby maintaining the suction of the cleaning device at the second target suction.

[0060] Optionally, the method further includes: in response to the first button exiting the pressing state, restoring the suction force of the cleaning device to the suction force corresponding to the first mode.

[0061] As an example, in response to the user pressing the first button for a duration greater than or equal to the first duration threshold, the cleaning device increases the rotation speed of the suction motor to increase the suction force of the cleaning device. If the user then stops pressing the first button when the pressing duration is less than the second duration threshold, the cleaning device restores the rotation speed of the suction motor to the rotation speed corresponding to the first mode to restore the suction force of the cleaning device to the suction force corresponding to the first mode.

[0062] As another example, in response to the user pressing the first button for a duration greater than or equal to the first duration threshold, the cleaning device increases the rotation speed of the suction motor of the cleaning device to increase the suction of the cleaning device. If the user continues to press the first button and the pressing duration is greater than or equal to the second duration threshold, the cleaning device increases the rotation speed of the suction motor again to increase the suction of the cleaning device again. If the user stops pressing the first button, the cleaning device restores the rotation speed of the suction motor to the rotation speed corresponding to the first mode to restore the suction of the cleaning device to the suction corresponding to the first mode.

[0063] In an optional implementation, the method further includes: determining that the first button exits the pressing state before the pressing time reaches a first time threshold, and switching the cleaning device from the first mode to the second mode.

[0064] In an embodiment of the present disclosure, the second mode is any one of the preset working modes of the cleaning device, and the second mode is different from the first mode.

[0065] For example, if the user stops pressing the first button before the duration of pressing the first button is greater than or equal to the first duration threshold, the working mode of the cleaning device is switched from the first mode to the second mode.

[0066] Optionally, the first mode and the second mode are different, and the first mode and the second mode are any one of the following: standard mode; water absorption mode; sterilization mode.

[0067] As an example, taking the first mode as the standard mode and the second mode as the water absorption mode as an example, if the user presses the first button for 2 seconds and then stops pressing the first button, the cleaning device switches from the standard mode to the water absorption mode.

[0068] In some embodiments of the present disclosure, when the working mode of the cleaning device is switched from the first mode to the second mode, the cleaning device may issue a corresponding prompt message, for example, a corresponding prompt sound.

[0069] By implementing the embodiments of the present disclosure, when the pressing time after the first button enters the pressing state is greater than or equal to the first threshold, the suction force of the cleaning device can be increased, and after the first button exits the pressing state, the suction force of the cleaning device can be restored to the suction force corresponding to the first mode. This can prevent the cleaning device from being in an unconventional working mode for a long time, increase the usable time of a single charge of the cleaning device, and thus improve the user experience.

[0070] In some embodiments of the present disclosure, the cleaning device is a floor scrubber.

[0071] Among them, in the embodiment of the present disclosure, the above-mentioned floor scrubber can be a rechargeable cordless floor scrubber.

[0072] See also Figure 3 , Figure 3 is a schematic diagram showing a control scheme of a cleaning device according to an exemplary embodiment. The cleaning device may be a floor scrubber. Figure 3 As shown, after the floor scrubber starts working, if the user short presses the preset working mode switch button on the floor scrubber, the floor scrubber can sequentially switch between working modes such as standard mode, water absorption mode and sterilization mode. If the user continues to long press the working mode switch button, the speed of the suction motor of the floor scrubber will increase to increase the suction force of the floor scrubber. After the user stops long pressing the working mode switch button, the floor scrubber restores the speed of the suction motor to the speed corresponding to the working mode before pressing the working mode switch button.

[0073] See also Figure 4 , Figure 4 FIG. 1 is a block diagram of a control device for a cleaning device according to an exemplary embodiment. Figure 4 As shown, the device 400 includes: a first processing module 401, used to determine whether the first button of the cleaning device enters a pressed state in response to the cleaning device being in a first mode; a second processing module 402, used to obtain the pressing time of the first button in response to the first button entering a pressed state; a first control module 403, used to adjust the suction force of the cleaning device according to the pressing time.

[0074] In one implementation, the first control module 403 is specifically configured to: in response to a pressing duration being greater than or equal to a first duration threshold, increase the suction force of the cleaning device.

[0075] In an optional implementation, the first control module 403 is further configured to: in response to the suction force of the cleaning device increasing to the first target suction force, maintain the suction force of the cleaning device at the first target suction force unchanged.

[0076] In an optional implementation, the first control module 403 is specifically configured to: in response to the pressing time being greater than a second time threshold, increase the suction force of the cleaning device again; wherein the second time threshold is greater than the first time threshold.

[0077] In an optional implementation, the above device further includes a second control module. As an example, see Figure 5 , Figure 5 FIG. 1 is a block diagram of another control device for a cleaning device according to an exemplary embodiment. Figure 5 As shown, the device 500 further includes: a second control module 504, which is used to increase the suction force of the cleaning device again in response to the pressing time being greater than a second time threshold; wherein the second time threshold is greater than the first time threshold. Figure 5 Modules 501 to 503 in Figure 4 Modules 401 to 403 in the embodiment have the same structure and function.

[0078] Optionally, the above device further includes a third control module. As an example, see Figure 6 , Figure 6 FIG. 1 is a block diagram of another control device for a cleaning device according to an exemplary embodiment. Figure 6 As shown, the device 600 further includes: a third control module 604, configured to restore the rotation speed of the suction motor of the cleaning device to the rotation speed corresponding to the first mode in response to the first button exiting the pressing state. Figure 6 Modules 601 to 603 in Figure 4 Modules 401 to 403 in the embodiment have the same structure and function.

[0079] In an optional implementation, the above device further includes: a fourth control module. As an example, see Figure 7 , Figure 7 FIG. 1 is a block diagram of another control device for a cleaning device according to an exemplary embodiment. Figure 7 As shown, the device 700 further includes: a fourth control module 704, which is used to determine that the first button exits the pressing state before the pressing time reaches the first time threshold, and switches the cleaning device from the first mode to the second mode. Figure 7 Modules 701 to 703 in Figure 4 Modules 401 to 403 in the embodiment have the same structure and function.

[0080] Optionally, the first mode and the second mode are different, and the first mode and the second mode are any one of the following: standard mode; water absorption mode; sterilization mode.

[0081] In one implementation, the cleaning device is a floor scrubber.

[0082] Through the device of the embodiment of the present disclosure, when the cleaning device is in the first mode, the suction force of the cleaning device can be adjusted according to the pressing time after the first button enters the pressing state, and after the first button exits the pressing state, the suction force of the cleaning device is restored to the suction force corresponding to the first mode. This can prevent the cleaning device from being in an unconventional working mode for a long time, increase the usable time of a single charge of the cleaning device, and thus improve the user experience.

[0083] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0084] Figure 8 is a block diagram of a cleaning device according to an exemplary embodiment.

[0085] Reference Figure 8 , the cleaning device 800 may include one or more of the following components: a processing component 802 , a memory 804 , a power component 806 , a multimedia component 808 , an input / output (I / O) interface 810 , and a communication component 812 .

[0086] Processing component 802 generally controls the overall operation of cleaning equipment 800, such as operations associated with display, data communication and recording operations. Processing component 802 may include one or more processors 820 to execute instructions to complete all or part of the steps of the above-mentioned method. In addition, processing component 802 may include one or more modules to facilitate the interaction between processing component 802 and other components. For example, processing component 802 may include a multimedia module to facilitate the interaction between multimedia component 808 and processing component 802.

[0087] The memory 804 is configured to store various types of data to support operations on the device 800. Examples of such data include instructions for any application or method operating on the cleaning device 800, contact data, phone book data, messages, pictures, videos, etc. The memory 804 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk.

[0088] Power component 806 provides power to various components of cleaning device 800. Power component 806 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to cleaning device 800.

[0089] Multimedia component 808 includes a screen providing an output interface between the cleaning device 800 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundaries of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation.

[0090] The input / output interface 810 provides an interface between the processing component 802 and a peripheral interface module, which may be a keyboard, a click wheel, a button, etc.

[0091] The communication component 812 is configured to facilitate wired or wireless communication between the cleaning device 800 and other devices. The cleaning device 800 can access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 812 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 812 also includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies.

[0092] In an exemplary embodiment, the cleaning device 800 can be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the above methods.

[0093] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 804 including instructions, which can be executed by a processor 820 of the cleaning device 800 to perform the above method. For example, the non-transitory computer-readable storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc.

[0094] The present disclosure also provides a computer program product, which implements the functions of any of the above method embodiments when executed by a computer.

[0095] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. The present disclosure is intended to cover any variations, uses or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The description and examples are to be considered exemplary only, and the true scope and spirit of the present invention are indicated by the following claims.

[0096] It should be understood that the present invention is not limited to the exact construction that has been described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A method for controlling a cleaning device, characterized in that: include: In response to the cleaning device being in the first mode, determining whether a first button of the cleaning device enters a pressed state; In response to the first button entering a pressed state, acquiring a pressing duration of the first button; The suction force of the cleaning device is adjusted according to the pressing time.

2. The method according to claim 1, characterized in that The adjusting the suction force of the cleaning device according to the pressing time includes: In response to the pressing duration being greater than or equal to a first duration threshold, the suction force of the cleaning device is increased.

3. The method according to claim 2, characterized in that The method further comprises: In response to the suction force of the cleaning device increasing to a target suction force, the suction force of the cleaning device is maintained at the target suction force.

4. The method according to claim 2, characterized in that The method further comprises: In response to the pressing time being greater than a second time threshold, the suction force of the cleaning device is increased again; wherein the second time threshold is greater than the first time threshold.

5. The method according to claim 2 or 4, characterized in that The method further comprises: In response to the first button exiting the pressed state, the suction force of the cleaning device is restored to the suction force corresponding to the first mode.

6. The method according to claim 2, characterized in that The method further comprises: It is determined that the first button exits the pressing state before the pressing time reaches the first time threshold, and the cleaning device is switched from the first mode to the second mode.

7. The method according to claim 6, characterized in that The first mode and the second mode are different, and the first mode and the second mode are any one of the following: Standard mode; Water absorption mode; Sterilization mode.

8. The method according to claim 1, characterized in that The cleaning equipment is a floor scrubber.

9. A control device for a cleaning device, characterized in that: include: A first processing module, configured to determine whether a first button of the floor scrubber enters a pressed state in response to the floor scrubber being in a first mode; A second processing module, configured to obtain a pressing time of the first button in response to the first button entering a pressing state; The first control module is used to adjust the rotation speed of the suction motor of the floor scrubber according to the pressing time.

10. A cleaning device, characterized in that: The device comprises: at least one processor; and a memory communicatively connected to the at least one processor; wherein, The memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the method according to any one of claims 1 to 8.

11. A non-transitory computer-readable storage medium storing computer instructions, characterized in that: The computer instructions are used to cause the computer to execute the method according to any one of claims 1 to 8.

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