Power supply circuit, lighting system and cabinet

Abstract

The utility model is suitable for the technical field of cabinets, and provides a power supply circuit, a lighting system and a cabinet, the power supply circuit comprises a voltage conversion module and at least one voltage regulation module, the voltage conversion module is electrically connected with all the voltage regulation modules, and the voltage conversion module is used for being electrically connected with an alternating current power supply. Each voltage adjusting module is used for being electrically connected with the corresponding lighting device. The voltage conversion module is used for converting alternating current output by the alternating current power supply into first direct current voltage, and the voltage regulation module is used for converting the first direct current voltage into voltage required by various lighting devices. According to the power supply circuit provided by the embodiment of the invention, the voltage regulation module is additionally arranged, so that the use requirements of various lighting devices with different voltage specifications can be met, the problem that an existing cabinet power supply cannot meet the use requirements of various lighting devices with different voltage specifications at the same time is solved, and the applicability between the power supply circuit and the lighting devices is improved.

Description

Technical Field

[0001] The present application belongs to the technical field of cabinets, and in particular, relates to a power supply circuit, a lighting system and a cabinet. Background Art

[0002] The cabinet power supply is used to convert AC power into DC power to supply various lighting equipment in the cabinet. However, the current cabinet power supply can only output a single voltage. Therefore, users must select lighting equipment that matches the cabinet power supply according to its output voltage, and it is impossible to simultaneously meet the use of multiple lighting equipment with different voltage specifications. Therefore, there is a problem of poor applicability between the existing cabinet power supply and lighting equipment. Utility Model Content

[0003] The embodiments of the present application provide a power supply circuit, a lighting system and a cabinet, which can solve the problem of poor applicability between existing cabinet power supplies and lighting equipment.

[0004] In a first aspect, an embodiment of the present application provides a power supply circuit, including a voltage conversion module and at least one voltage regulation module, wherein the voltage conversion module is electrically connected to all the voltage regulation modules, the voltage conversion module is used to be electrically connected to an AC power supply, and each of the voltage regulation modules is used to be electrically connected to a corresponding lighting device;

[0005] The voltage conversion module is used to convert the AC power output by the AC power supply into a first DC voltage, and the voltage regulation module is used to convert the first DC voltage into voltages required by the various lighting devices.

[0006] In a possible implementation manner of the first aspect, the voltage conversion module includes an AC-DC converter, and the AC-DC converter is electrically connected to the AC power supply and all the voltage regulation modules respectively.

[0007] In a possible implementation manner of the first aspect, the voltage regulating module includes a voltage regulating unit and a connecting unit, the voltage regulating unit is electrically connected to the voltage conversion module and the corresponding connecting unit respectively, and the connecting unit is used to be electrically connected to the lighting device accordingly;

[0008] The voltage regulating unit is used for converting the first DC voltage into voltages required by the various lighting devices, and transmitting the voltages required by the lighting devices to the lighting devices through the connecting unit.

[0009] In a possible implementation of the first aspect, the voltage regulating unit includes a power supply chip, which is electrically connected to the voltage conversion module and the corresponding connection unit respectively; the power supply chip is used to obtain the voltage requirement information of the lighting device through the connection unit, and output the required voltage of the lighting device according to the voltage requirement information.

[0010] In a possible implementation of the first aspect, the connection unit includes a Type-C interface and a USB interface electrically connected to the Type-C interface, the USB interface is electrically connected to the voltage adjustment unit, and the Type-C interface is used to electrically connect to the lighting device.

[0011] In a possible implementation of the first aspect, the voltage regulation module includes a voltage regulation circuit and a selection switch, the voltage regulation circuit is electrically connected to the voltage conversion module, the selection switch and the lighting device, respectively, and the voltage regulation circuit is used to output a corresponding voltage according to a gear signal of the selection switch.

[0012] In a second aspect, an embodiment of the present application provides a lighting system, comprising multiple control modules, multiple lighting devices and the power supply circuit described in any one of the first aspects, the control modules being electrically connected to the corresponding lighting devices and the corresponding voltage regulating modules in the power supply circuit, respectively, and the voltage regulating modules in the power supply circuit being electrically connected to the corresponding lighting devices.

[0013] In a possible implementation manner of the first aspect, the lighting system further includes a display module, which is electrically connected to the control module and is used to display a working status of each of the lighting devices.

[0014] In a possible implementation manner of the first aspect, the lighting system further includes a scene mode selection module, the scene mode selection module is electrically connected to the control module, and the scene mode selection module is used to determine the scene mode according to the control signal.

[0015] In a third aspect, an embodiment of the present application provides a cabinet comprising the lighting system described in any one of the second aspects.

[0016] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0017] The power supply circuit provided in the embodiment of the present application includes a voltage conversion module and at least one voltage regulating module. The voltage conversion module is used to be electrically connected to an AC power supply, and can convert the AC power output by the AC power supply into a first DC voltage. Since each voltage regulating module is electrically connected to a corresponding lighting device, each voltage regulating module can convert the first DC voltage into the voltage required by the lighting device connected thereto. Considering that the voltage required for each lighting device may be different, the power supply circuit provided in the embodiment of the present application can meet the use requirements of a variety of lighting devices with different voltage specifications by adding a voltage regulating module, thereby solving the problem that the existing cabinet power supply cannot simultaneously meet the use requirements of a variety of lighting devices with different voltage specifications, and improving the applicability between the power supply circuit and the lighting device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 is a principle block diagram of a power supply circuit provided in an embodiment of the present application;

[0020] Figure 2 is a principle block diagram of a power supply circuit provided in another embodiment of the present application;

[0021] Figure 3 is a principle block diagram of a power supply circuit provided in another embodiment of the present application;

[0022] Figure 4 is a principle block diagram of a lighting system provided by an embodiment of the present application;

[0023] Figure 5 It is a principle block diagram of a lighting system provided in another embodiment of the present application.

[0024] In the figure: 10, power supply circuit; 101, voltage conversion module; 102, voltage regulation module; 1021, voltage regulation unit; 1022, connection unit; 201, control module; 202, display module; 203, scene mode selection module; 20, AC power supply; 30, lighting equipment. DETAILED DESCRIPTION

[0025] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0026] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or combinations thereof.

[0027] As used in the specification and appended claims of this application, the term "if" can be interpreted as "when" or "uponce" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrase "if it is determined" or "if [described condition or event] is detected" can be interpreted as meaning "uponce it is determined" or "in response to determining" or "uponce [described condition or event] is detected" or "in response to detecting [described condition or event]", depending on the context.

[0028] In addition, in the description of the present application specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.

[0029] References to "one embodiment" or "some embodiments" etc. described in the specification of this application mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0030] The current cabinet power supply can only output a single voltage, for example, the cabinet power supply can only output 5V voltage, 12V voltage, 24V voltage or 48V voltage, etc. Different specifications and models of lighting equipment have different working voltages, for example, some lighting equipment has a working voltage of 5V, some lighting equipment has a working voltage of 12V, some lighting equipment has a working voltage of 24V, and some lighting equipment has a working voltage of 48V. Therefore, users must choose lighting equipment that matches the output voltage of the cabinet power supply. The same cabinet power supply can only be used for lighting equipment of fixed specifications and models, and cannot meet the use of multiple lighting equipment of different voltage specifications at the same time, resulting in poor applicability between the existing cabinet power supply and lighting equipment.

[0031] Based on the above problems, the power supply circuit provided in the embodiment of the present application includes a voltage conversion module and at least one voltage regulating module. The voltage conversion module is used to be electrically connected to an AC power supply, and can convert the AC power output by the AC power supply into a first DC voltage. Since each voltage regulating module is electrically connected to a corresponding lighting device, each voltage regulating module can convert the first DC voltage into the voltage required by the lighting device connected thereto. Considering that the voltage required for each lighting device may be different, the power supply circuit provided in the embodiment of the present application can meet the use requirements of a variety of lighting devices with different voltage specifications by adding a voltage regulating module, thereby solving the problem that the existing cabinet power supply cannot simultaneously meet the use requirements of a variety of lighting devices with different voltage specifications, and improving the applicability between the power supply circuit and the lighting device.

[0032] In order to illustrate the technical solution described in this application, a specific embodiment is provided below for illustration.

[0033] Figure 1 FIG. 1 shows a principle block diagram of a power supply circuit 10 provided in an embodiment of the present application. Figure 1 As shown, the power supply circuit 10 includes a voltage conversion module 101 and at least one voltage regulation module 102. The voltage conversion module 101 is electrically connected to all the voltage regulation modules 102. The voltage conversion module 101 is used to be electrically connected to the AC power supply 20, and each voltage regulation module 102 is used to be electrically connected to the corresponding lighting device 30.

[0034] Specifically, the voltage conversion module 101 is used to be electrically connected to the AC power supply 20, and can convert the AC power output by the AC power supply 20 into a first DC voltage. Since each voltage regulating module 102 is electrically connected to the corresponding lighting device 30, each voltage regulating module 102 can convert the first DC voltage into the voltage required by the lighting device 30 connected thereto. Considering that the voltage required by each lighting device 30 may be different, the power supply circuit 10 provided in the embodiment of the present application can meet the use requirements of a variety of lighting devices 30 with different voltage specifications by adding a voltage regulating module 102, thereby solving the problem that the existing cabinet power supply cannot simultaneously meet the use requirements of a variety of lighting devices 30 with different voltage specifications, and improving the applicability between the power supply circuit 10 and the lighting device 30.

[0035] It should be noted that if the power supply circuit 10 includes a voltage regulating module 102, the voltage regulating module 102 can obtain the voltage required by the lighting device 30 connected thereto, and convert the first DC voltage into the voltage required by the lighting device 30, so that the lighting device 30 can work normally and exert its expected lighting effect. This design ensures that lighting devices 30 with different voltage requirements can be connected to the same lighting system, improves the versatility and flexibility of the system, and also improves the convenience and satisfaction of users in using the lighting devices 30.

[0036] For example, if the voltage required by the lighting device 30 is 5V, the voltage regulating module 102 can convert the first DC voltage into 5V and transmit it to the lighting device 30. If the voltage required by the lighting device 30 is 12V, the voltage regulating module 102 can convert the first DC voltage into 12V and transmit it to the lighting device 30.

[0037] It should be noted that if the power supply circuit 10 includes multiple voltage regulating modules 102, the specifications and types of the lighting devices 30 connected to the voltage regulating modules 102 may be different, so that the voltages required by various types of lighting devices 30 can be met at the same time.

[0038] It should be noted that existing cabinet power supplies and lighting equipment require foolproof design (such as foolproof plug-in terminal interfaces) to prevent operational errors. However, the power supply circuit 10 proposed in this solution does not require foolproof design, saving costs and energy consumption.

[0039] In one embodiment of the present application, the voltage conversion module 101 includes an AC-DC converter, and the AC-DC converter is electrically connected to the AC power source 20 and all the voltage regulation modules 102 respectively.

[0040] Specifically, the AC-DC converter can convert the input AC power into DC power to supply the voltage regulating module 102 and the lighting device 30. In the power supply circuit 10, the AC power is usually input through a socket or a power cord, and the lighting device 30 usually requires a DC power supply to drive. Therefore, the use of the AC-DC converter ensures the energy conversion and transmission from the AC power supply 20 to the lighting device 30 to meet the power requirements of the voltage regulating module 102 and the lighting device 30, thereby achieving normal operation of the lighting device 30.

[0041] In one embodiment of the present application, Figure 2 As shown, the voltage regulating module 102 includes a voltage regulating unit 1021 and a connecting unit 1022 . The voltage regulating unit 1021 is electrically connected to the voltage conversion module 101 and the corresponding connecting unit 1022 , respectively. The connecting unit 1022 is used to electrically connect to the lighting device 30 .

[0042] Specifically, the voltage regulating unit 1021 is used to convert the first DC voltage into the voltage required by the lighting device 30, and transmit the voltage required by the lighting device 30 to the lighting device 30 through the connecting unit 1022. It can be seen that the voltage regulating unit 1021 can ensure the stability of the output voltage and provide the correct DC voltage for the lighting device 30 to meet the working voltage requirements of the lighting device 30. The connecting unit 1022 is mainly used to connect the voltage regulating unit 1021 and the corresponding lighting device 30, so as to transmit the adjusted DC voltage to the lighting device 30, ensure a stable electrical connection, and effectively transmit electrical energy to the lighting device 30.

[0043] It should be noted that the voltage regulating unit 1021 can use electronic devices (capacitors, inductors, switches, etc.) to achieve voltage regulation to ensure that the voltage transmitted to the lighting device 30 is the voltage required by the lighting device 30. The connecting unit 1022 usually includes components such as cables, joints, and connectors to ensure stable electrical connection and effectively transmit electrical energy to the lighting device 30.

[0044] In one embodiment of the present application, the voltage regulating unit 1021 includes a power-taking chip, and the power-taking chip is electrically connected to the voltage conversion module 101 and the corresponding connection unit 1022 respectively.

[0045] Specifically, the power chip can obtain the voltage requirement information of the lighting device 30 through the connection unit 1022, and output the required voltage of the lighting device 30 according to the voltage requirement information. The use of the power chip can achieve efficient power management, ensuring that the lighting device 30 connected to the voltage adjustment unit 1021 obtains a stable and correct voltage, so as to ensure that the lighting device 30 works normally and provides the required lighting effect.

[0046] For example, the specific model of the power supply chip will vary according to the application needs and design requirements. Common models include but are not limited to LM7805 (5V fixed positive voltage regulator), LM317 (adjustable positive voltage regulator), etc.

[0047] In one embodiment of the present application, Figure 4 As shown, the connection unit 1022 includes a Type-C interface and a USB interface electrically connected to the Type-C interface, the USB interface is electrically connected to the voltage adjustment unit 1021, and the Type-C interface is used to electrically connect to the lighting device 30.

[0048] Specifically, the Type-C interface and the USB interface electrically connected to the Type-C interface can effectively connect the voltage regulating unit 1021 and the corresponding lighting device 30 together, providing a reliable power transmission channel for the voltage regulating unit 1021 and the lighting device 30, so that the voltage output by the voltage regulating unit 1021 can be accurately and safely transmitted to the lighting device 30, thereby ensuring the normal operation of the lighting device 30.

[0049] It should be noted that the omnidirectional design of the Type-C interface allows the plug to be easily inserted into the interface regardless of the forward or reverse direction, which can improve user convenience, reduce the possibility of mis-insertion, and make the connection easier. At the same time, the Type-C interface supports high-speed data transmission, is suitable for a large amount of power transmission and data communication, improves data transmission speed, and shortens the response time of the lighting device 30. In addition, the Type-C interface is an international standard. By adopting this standard interface, compatibility with the lighting device 30 can be ensured, and the complexity of the connection between the voltage regulating module 102 and the lighting device 30 can be reduced.

[0050] It should be noted that the USB Type-C interface has wide compatibility and can support multiple USB protocols, fast charging protocols and PD protocols, with a power range from 20W to 140W or even higher. Due to this feature, there are a large number of Vbus and GND pins, especially the CC pin. The two-channel configuration (CC1 and CC2) of the CC pin in the USB Type-C interface is used for functional negotiation, which not only determines the insertion direction of the interface, but also negotiates the power supply function, alternative mode and peripheral mode, without worrying about the problem of forward and reverse insertion.

[0051] In one embodiment of the present application, the voltage regulating module 102 includes a voltage regulating circuit and a selection switch, and the voltage regulating circuit is electrically connected to the voltage conversion module 101, the selection switch and the lighting device 30. The voltage regulating circuit is used to output a corresponding voltage according to the gear position signal of the selection switch.

[0052] Specifically, the selection switch can be a control device for manually or automatically adjusting the voltage, can set different gears, and output corresponding gear signals to instruct the voltage regulation circuit to output the corresponding voltage. Finally, the voltage output by the voltage regulation circuit according to the gear signal is transmitted to the lighting device 30 for its normal operation.

[0053] In one embodiment of the present application, Figure 4 As shown, the present application also discloses a lighting system, which includes multiple control modules 201, multiple lighting devices 30 and the above-mentioned power supply circuit 10, the control modules 201 are electrically connected to the corresponding lighting devices 30 and the corresponding voltage regulating modules 102 in the power supply circuit 10, and the voltage regulating modules 102 in the power supply circuit 10 are electrically connected to the corresponding lighting devices 30.

[0054] Specifically, the control module 201 can monitor and control the power supply of the lighting device 30 to ensure the stability and efficiency of the lighting system. The control module 201 can also control the lighting device 30 (such as switching, dimming, color adjustment, etc.) to meet the lighting requirements of different scenes and needs, improve the flexibility and intelligence level of the lighting system, and bring users a more comfortable and convenient lighting experience.

[0055] It should be noted that if Figure 4 As shown, the control module 201 can be electrically connected to the corresponding lighting device 30 and the corresponding voltage regulating module 102 in the power supply circuit 10 respectively, the lighting device 30 can be directly electrically connected to the voltage regulating module 102 in the power supply circuit 10, and the power-taking chip can send a signal to the lighting device 30 to obtain the voltage required by the lighting device 30, and transmit the voltage required by the lighting device 30 to the lighting device 30.

[0056] It should be noted that one or more Type-C interfaces are provided at the output end of the power supply circuit 10. The control module 201 can be connected to the power supply circuit 10 through any Type-C interface, and the lighting device 30 can also be connected to the power supply circuit 10 through any Type-C interface.

[0057] It should be noted that each control module 201 does not interfere with each other, and the signal sent by the power chip is transmitted to the control module 201 through the Type-C interface for decoding and signal processing to control different lighting devices 30.

[0058] It should be noted that the control module 201 can also use wireless communication transmission for remote control, allowing the user to remotely monitor and control the lighting system through a mobile phone application or a network interface, so that the user can control and adjust the lighting device 30 anytime and anywhere, thereby improving the operability and convenience of the lighting system.

[0059] In one embodiment of the present application, Figure 5 As shown, the lighting system further includes a display module 202 , which is electrically connected to the control module 201 , and is used to display the working status of the lighting device 30 .

[0060] Specifically, the display module 202 can monitor and display the working status of the lighting device 30 in real time, that is, it can display the switch status (on or off), brightness adjustment, color temperature adjustment, fault conditions (overload, short circuit) and other information of the lighting device 30. The display module 202 can display this information through LED indicator lights, liquid crystal display screens, etc., to help users understand the operation of the lighting system, help to promptly discover and solve faults or abnormal conditions of the lighting device 30, and ensure the stability and reliability of the lighting system. At the same time, the display module 202 also has a user interaction function, allowing the user to set and adjust the lighting system through the display interface operation, thereby improving the user experience and satisfaction.

[0061] In one embodiment of the present application, Figure 5 As shown, the lighting system further includes a scene mode selection module 203, which is electrically connected to the control module 201, and is used to determine the scene mode according to the control signal.

[0062] Specifically, the scene mode selection module 203 can intelligently determine the scene mode of the lighting system by receiving the control signal. That is, according to the user's needs or the requirements of a specific occasion, the lighting system can automatically adjust the brightness, color temperature, switch state and other parameters of the lighting device 30 to adapt to different usage scenarios, such as parties, work, reading, etc., thereby improving the flexibility, applicability and personalized experience of the system. At the same time, the scene mode selection module 203 can intelligently adjust the parameters of the lighting system according to the needs of different scenarios to achieve higher energy efficiency, which is in line with the concept of energy saving and environmental protection.

[0063] The present application also discloses a cabinet, including the above-mentioned power supply system. By installing the above-mentioned power supply system in the cabinet, the use requirements of various lighting devices 30 with different voltage specifications can be met, thereby solving the problem that the existing cabinet power supply cannot simultaneously meet the use requirements of various lighting devices 30 with different voltage specifications, and improving the applicability between the power supply circuit 10 and the lighting device 30.

[0064] Since the processing and functions implemented by the cabinet in this embodiment basically correspond to the embodiments, principles and examples of the aforementioned power supply circuit, for the details not fully described in this embodiment, please refer to the relevant descriptions in the aforementioned embodiments, and no further elaboration will be made here.

[0065] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A power supply circuit, characterized in that: It includes a voltage conversion module and at least one voltage regulating module, wherein the voltage conversion module is electrically connected to all the voltage regulating modules, the voltage conversion module is used to be electrically connected to an AC power supply, and each of the voltage regulating modules is used to be electrically connected to a corresponding lighting device; The voltage conversion module is used to convert the AC power output by the AC power supply into a first DC voltage, and the voltage regulation module is used to convert the first DC voltage into voltages required by the various lighting devices.

2. The power supply circuit according to claim 1, characterized in that: The voltage conversion module includes an AC-DC converter, and the AC-DC converter is electrically connected to the AC power supply and all the voltage regulating modules respectively.

3. The power supply circuit according to claim 1, characterized in that: The voltage regulating module comprises a voltage regulating unit and a connecting unit, wherein the voltage regulating unit is electrically connected to the voltage conversion module and the corresponding connecting unit respectively, and the connecting unit is used to be electrically connected to the corresponding lighting device; The voltage regulating unit is used for converting the first DC voltage into voltages required by the various lighting devices, and transmitting the voltages required by the lighting devices to the lighting devices through the connecting unit.

4. The power supply circuit according to claim 3, characterized in that: The voltage regulating unit includes a power-taking chip, which is electrically connected to the voltage conversion module and the corresponding connection unit respectively; the power-taking chip is used to obtain the voltage requirement information of the lighting device through the connection unit, and output the required voltage of the lighting device according to the voltage requirement information.

5. The power supply circuit according to claim 3, characterized in that: The connection unit includes a Type-C interface and a USB interface electrically connected to the Type-C interface, the USB interface is electrically connected to the voltage regulating unit, and the Type-C interface is used to be electrically connected to the lighting device.

6. The power supply circuit according to claim 3, characterized in that: The voltage regulating module includes a voltage regulating circuit and a selection switch. The voltage regulating circuit is electrically connected to the voltage conversion module, the selection switch and the lighting device respectively. The voltage regulating circuit is used to output a corresponding voltage according to a gear position signal of the selection switch.

7. A lighting system, characterized in that: It comprises a plurality of control modules, a plurality of lighting devices and the power supply circuit as described in any one of claims 1 to 6, wherein the control modules are electrically connected to the corresponding lighting devices and the corresponding voltage regulating modules in the power supply circuit, respectively, and the voltage regulating modules in the power supply circuit are electrically connected to the corresponding lighting devices.

8. The lighting system according to claim 7, characterized in that The lighting system further comprises a display module, which is electrically connected to the control module and is used to display the working status of the lighting device.

9. The lighting system according to claim 8, characterized in that The lighting system further comprises a scene mode selection module, the scene mode selection module is electrically connected to the control module, and the scene mode selection module is used to determine the scene mode according to the control signal.

10. A cabinet, characterized in that: A lighting system comprising any one of claims 7 to 9.

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