Panel structure and phototherapy instrument

Abstract

The utility model discloses a panel structure and phototherapy instrument relates to medical instrument technical field, the panel structure includes casing, circuit board subassembly and protection subassembly, the casing includes upper cover and control panel, the upper cover is equipped with the mounting hole, control panel is installed in the mounting hole, circuit board subassembly is installed in the upper cover, and the protection subassembly is equipped with the circuit board subassembly. The circuit board assembly comprises a board body and an electronic element, the electronic element is installed on the board body and corresponds to the control panel, and the protection assembly is connected to the board body and covers the electronic element. According to the technical scheme provided by the utility model, the problem that the static electricity in the existing phototherapy instrument easily enters the circuit board in the shell through a gap to damage the electronic element is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, and particularly relates to a panel structure and a light therapy instrument. Background Art

[0002] In a light therapy instrument, the main operation panel of the light therapy instrument is usually embedded and installed on the housing to integrate the keys required for operation, as well as the display screen, indicator light display, etc. Generally, a circuit board is provided inside the housing, and corresponding electronic components, such as various switches, LED lights, display screens, etc., are installed on the circuit board.

[0003] However, there are often gaps between the operation panel and the housing, and static electricity can easily enter the circuit board under the operation panel through the gaps, causing harm to the electronic components and resulting in abnormal output of the treatment function or even damage. Summary of the Utility Model

[0004] The main purpose of the utility model is to provide a panel structure and a light therapy instrument, aiming to solve the problem that static electricity in the existing light therapy instrument can easily enter the circuit board inside the housing through the gaps and cause harm to the electronic components.

[0005] To achieve the above purpose, the utility model provides a panel structure applied to a light therapy instrument, including: a housing, the housing includes an upper cover and a control panel, the upper cover is provided with an installation hole, and the control panel is installed in the installation hole; a circuit board assembly, the circuit board assembly is installed inside the upper cover, the circuit board assembly includes a board body and electronic components, the electronic components are installed on the board body and correspond to the control panel; and a protection component, the protection component is connected to the board body and covers the outside of the electronic components.

[0006] In an embodiment, the control panel is provided with key holes; the panel structure further includes a key assembly, the key assembly is installed in the key holes; the electronic components include tactile switch components, the tactile switch components are installed on the board body; the protection component includes key protection parts, the key protection parts are connected to the board body and cover the tactile switch components, and the key assembly contacts the switch components through the key protection parts.

[0007] In an embodiment, convex platforms are convexly provided on both sides of the key protection part.

[0008] In an embodiment, an inverted buckle part is convexly provided at the bottom of the key protection part, a connection hole is provided on the board body, and the key protection part is inserted and connected to the connection hole through the inverted buckle part.

[0009] In one embodiment, the key protection member includes: a main body frame, which is disposed around the tactile switch member and has an opening; a pressing block, which is located between the key assembly and the tactile switch member and within the opening; and an elastic arm, which is connected to the main body frame and the pressing block and seals the opening together with the pressing block.

[0010] In one embodiment, the electronic component further includes a display screen, which is mounted on the board body; the protection assembly further includes a screen protection cover, which is connected to the board body and covers the display screen; a first light-transmitting area is provided on the control panel, and the first light-transmitting area is arranged corresponding to the display screen.

[0011] In one embodiment, a buckle protrudes from the bottom of the screen protection cover, a card slot is formed on the board body, and the screen protection cover is connected to the board body through the buckle and the card slot.

[0012] In one embodiment, the electronic component further includes a display lamp, which is mounted on the board body; the protection assembly further includes a lamp cover, which is connected to the board body and covers the display lamp; a second light-transmitting area is provided on the control panel, and the second light-transmitting area is arranged corresponding to the display lamp.

[0013] In one embodiment, the protection assembly further includes a light homogenizing film, which is adhesively connected to the surface of the lamp cover facing away from the board body, and a third light-transmitting area is provided on the light homogenizing film, and the third light-transmitting area coincides with the second light-transmitting area.

[0014] The present utility model further provides a light therapy device, including the panel structure as described above.

[0015] Compared with the prior art, the panel structure and the light therapy device provided by the present utility model have the following beneficial effects:

[0016] The technical solution of the present utility model increases the creepage distance through the protection assembly disposed on the electronic component for electrostatic protection, so that static electricity starting from the gap between the upper cover and the control panel needs to pass through a longer path to reach the position of the electronic component, increasing the voltage required to cross this path, thereby reducing the possibility of arc discharge, effectively protecting the electronic component, and improving the long-term reliability and stability of the light therapy device during use. Description of the Drawings

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, 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 utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0018] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the panel structure of the utility model;

[0019] Figure 2 This is an exploded schematic diagram of an embodiment of the panel structure of the utility model;

[0020] Figure 3 This is a structural schematic diagram of an embodiment of a key protection member of the utility model;

[0021] Figure 4 It is a cross-sectional view of an embodiment of a key protection member of the utility model;

[0022] Figure 5 It is a cross-sectional view of an embodiment of the panel structure of the utility model at the key assembly;

[0023] Figure 6 This is a schematic structural diagram of an embodiment of a screen protection cover of the utility model;

[0024] Figure 7 It is a cross-sectional view of an embodiment of the panel structure of the utility model at the screen protection cover;

[0025] Figure 8 This is one of the structural schematic diagrams of an embodiment of a lampshade of the utility model;

[0026] Figure 9 This is a second structural schematic diagram of an embodiment of a lampshade of the present utility model.

[0027] Description of Figure Numbers:

[0028] 10. Shell; 11. Upper cover; 111. Mounting hole; 12. Control panel; 121. Key hole; 122. First light-transmitting area; 123. Second light-transmitting area; 20. Key assembly; 30. Circuit board assembly; 31. Board body; 311. Connection hole; 312. Card slot; 32. Electronic component; 321. Touch switch; 322. Display screen; 323. Display light; 40. Protection assembly; 41. Key protection piece; 411. Undercut; 412. Main frame; 413. Press block; 414. Elastic arm; 415. Boss; 42. Screen protection cover; 421. Buckle; 43. Lamp cover; 431. Positioning column; 44. Light-distributing film; 441. Third light-transmitting area.

[0029] The realization, functional features and advantages of the present utility model will be further described in conjunction with embodiments with reference to the accompanying drawings. Specific embodiments

[0030] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0031] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0032] In addition, the descriptions involving "first", "second", etc. in the present utility model are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0033] In a light therapy instrument, the operation panel of the main body of the light therapy instrument is usually embedded and installed on the housing to integrate the keys, display screen, indicator light display, etc. required for operation. Generally, a circuit board is provided inside the housing, and corresponding electronic components such as various switches, LED lights, and display screens are installed on the circuit board. However, there are often gaps between the operation panel and the housing, and static electricity can easily enter the circuit board under the operation panel through the gaps, causing harm to the electronic components and resulting in abnormal output of the treatment function or even damage.

[0034] Please refer to Figures 1 to 9, the present utility model proposes a panel structure (not marked in the figure), which is applied to a light therapy instrument (not shown in the figure), and includes: a housing 10, the housing 10 includes an upper cover 11 and a control panel 12, the upper cover 11 is provided with a mounting hole 111, and the control panel 12 is installed in the mounting hole 111; a circuit board assembly 30, the circuit board assembly 30 is installed in the upper cover 11, the circuit board assembly 30 includes a board body 31 and electronic components 32, the electronic components 32 are installed on the board body 31 and correspond to the control panel 12; and a protection component 40, the protection component 40 is connected to the board body 31 and covers the outside of the electronic components 32.

[0035] Specifically, the panel structure is applied to a light therapy instrument. The panel structure is a separately disassembled part of the outer shell of the light therapy instrument. The panel structure is used to integrate buttons, screen displays, indicator light displays, etc. required for operation. The panel structure includes a housing 10, a circuit board assembly 30, and a protection component 40. The circuit board assembly 30 is used to integrate electronic components 32, and the protection component 40 is arranged between the electronic components 32 and the housing 10 to increase the creepage distance for electrostatic protection.

[0036] The control panel 12 is detachably connected to the upper cover 11. For example, Figure 2 , the control panel 12 is connected to the mounting hole 111 by a buckle for easy disassembly and assembly.

[0037] The electronic components 32 are installed on the board body 31 and electrically connected to the board body 31. The specific type of the electronic components 32 can be selected according to the functions required by the light therapy instrument, and can be set as button switches, screens, indicator lights, etc. The electronic components 32 are correspondingly arranged with the functional areas on the control panel 12 and can be controlled through the control panel 12 to realize the established functions of the electronic components 32.

[0038] The protection component 40 is arranged between the board body 31 and the control panel 12 and covers the outside of the electronic components 32. Therefore, when static electricity enters from the gap between the control panel 12 and the upper cover 11, through the protection component 40, it can prevent the static electricity from directly entering the circuit board. After the static electricity enters along the gap, it will "crawl" along the surface of the protection component 40 and then enter the electronic components 32 through the gap between the protection component 40 and the board body 31. Therefore, through the protection component 40, the creepage distance of the static electricity can be increased and the pressure of the static electricity can be reduced. When the static electricity reaches the electronic components 32 through the protection component 40, the pressure of the static electricity at this time is not enough to cause harm to the electronic components 32, so that the functions of the light therapy instrument can be normally output to ensure the safe use of the light therapy instrument.

[0039] The material of the protection component 40 can be selected from insulating materials such as plastics and rubbers; the specific structure of the protection component 40 can be set according to the shape of the electronic component 32, as long as it can cover the outside of the electronic component 32; the installation structure of the protection component 40 can be set as welding or connection by fixing columns; the number of protection parts in the protection component 40 can be set according to the number of actually installed electronic components 32. Each electronic component 32 that needs to be protected can be equipped with a protection part for protection, or a whole protective cover can be used to protect multiple electronic components 32.

[0040] It should be understood that there are mainly two ideas for electrostatic protection in the structure. One is to completely isolate the electronic component 32 with insulating materials so that static electricity cannot enter the interior of the housing 10; the other is to increase the creepage distance of static electricity to the electronic component 32, and the static voltage is reduced to a level that cannot damage the device through a longer creepage distance. Since on the light therapy device, a panel structure integrated component needs to be set up, there will be gaps and it is impossible to completely isolate static electricity from entering the interior of the housing 10. Therefore, electrostatic protection is carried out by increasing the creepage distance. When static electricity passes through the protection component 40 from the gap, it will take a longer path to reach the position of the electronic component 32, which effectively protects the electronic component 32.

[0041] The technical solution of the present utility model is to set up a protection component 40. The protection component 40 covers the electronic component 32, and the creepage distance is increased through the protection component 40 for electrostatic protection, so that static electricity starting from the gap between the upper cover 11 and the control panel 12 needs to pass through a longer path to reach the position of the electronic component 32, increasing the voltage required to cross this path, thereby reducing the possibility of arc discharge, effectively protecting the electronic component 32, and improving the long-term reliability and stability of the light therapy device.

[0042] In the embodiment of the present utility model, a key hole 121 is opened on the control panel 12; the panel structure further includes a key component 20, and the key component 20 is installed in the key hole 121; the electronic component 32 includes a tactile switch component 321, and the tactile switch component 321 is installed on the board body 31; the protection component 40 includes a key protection part 41, and the key protection part 41 is connected to the board body 31 and covers the tactile switch component 321, and the key component 20 contacts the switch component through the key protection part 41.

[0043] In the prior art, when the key is installed, there will also be a gap between the key structure installed on the operation panel and the operation panel, and static electricity can directly enter the housing 10 from this gap, making the creepage distance of static electricity to the circuit board shorter and making it easier to damage the components.

[0044] In this embodiment, the button assembly 20 is installed on the button hole 121 of the control panel 12. A button protection member 41 is provided to cover the outside between the tactile switches, which can increase the creepage distance. Static electricity starts from the gap at the button assembly 20 and can reach the position of the tactile switch member 321 only after a long path, effectively protecting the tactile switch member 321, effectively reducing the failure rate, and ensuring the normal switching operation of the tactile switch member 321. In addition, as Figure 1 , the button assembly 20 is provided with an output start button, an energy increase / decrease button, and a power switch button.

[0045] In the embodiment of the present utility model, convex platforms 415 are convexly provided on both sides of the button protection member 41.

[0046] It should be noted that by providing the convex platforms 415 on the side wall of the button protection member 41, the convex platforms 415 and the wall surface of the button protection member 41 form a stepped surface, which can increase the creepage distance, form a longer structural path, better reduce the harm of static electricity, perform static electricity protection, and improve the reliability of the tactile switch member 321 and extend its service life.

[0047] As Figure 5 , A is the path for static electricity to enter from the gap between the button assembly 20 and the control panel 12 and reach the tactile switch member 321. It can be seen that by adding the button protection member 41 and providing the convex platforms 415 on the side wall of the button protection member 41, a larger creepage distance can be increased, effective static electricity protection can be formed, and the use effect of the phototherapy instrument can be ensured.

[0048] In the embodiment of the present utility model, an inverted buckle portion 411 is convexly provided at the bottom of the button protection member 41, a connection hole 311 is formed on the board body 31, and the button protection member 41 is connected to the connection hole 311 by inserting the inverted buckle portion 411.

[0049] It should be noted that the button protection member 41 is connected to the connection hole 311 of the board body 31 by inserting the inverted buckle portion 411, and the diameter of a part of the inverted buckle portion 411 is greater than the diameter of the connection hole 311, so that the button protection member 41 can be well connected to the board body 31 and the connection is more stable. In addition, in one embodiment, the button protection member 41 is made of silica gel material, so the inverted buckle portion 411 also has elasticity and will not damage the circuit board during installation; at the same time, the button protection member 41 made of silica gel material has better elasticity and can improve the button feel.

[0050] In an embodiment of the present utility model, the key protection member 41 includes: a main body frame, which is disposed around the tactile switch member 321 and has an opening; a pressing block 413, which is located between the key assembly 20 and the tactile switch member 321 and is located within the opening; and an elastic arm 414, which is connected to the main body frame and the pressing block 413 and closes the opening together with the pressing block 413.

[0051] Specifically, as Figure 3 , the pressing block 413 is arranged corresponding to the key of the key assembly 20. The key assembly 20 contacts the tactile switch member 321 through the pressing block 413. The pressing block 413 is connected to the main body frame through the elastic arm 414. The pressing block 413 can be reset through the elastic arm 414 for the next use. This design enables the pressing block 413 to be reset and can also maintain the effect of electrostatic protection.

[0052] Furthermore, as Figure 4 , the elastic arm 414 is inclined, and the inclination angle is preferably 45 degrees. The inclined elastic arm 414 can provide a greater elastic restoring force in the direction of supporting the pressing block 413, making the reset effect of the pressing block 413 better and facilitating use.

[0053] In addition, a positioning hole (not marked in the figure) is provided on the pressing block 413. A positioning post 431 protrudes from the bottom of the key assembly 20. During installation, the output start key, the energy addition and subtraction key, and the power switch key are docked and installed with the positioning hole of the key protection member 41 through the positioning post 431, making the installation more convenient and accurate.

[0054] In an embodiment of the present utility model, the electronic component 32 further includes a display screen 322, and the display screen 322 is installed on the board body 31; the protection component 40 further includes a screen protection cover 42, and the screen protection cover 42 is connected to the board body 31 and covers the display screen 322; a first light-transmitting area 122 is provided on the control panel 12, and the first light-transmitting area 122 is arranged corresponding to the display screen 322.

[0055] Specifically, setting the screen protection cover 42 to cover the outside of the display screen 322 can increase the creepage distance. When static electricity enters from the gap between the control panel 12 and the upper cover 11, it needs to pass through a longer structural path to reach the position of the display screen 322, which can effectively reduce the damage caused by static electricity, effectively protect the display screen 322, enable the display screen 322 to be used normally, and maintain the display performance of the display screen 322.

[0056] The screen protection cover 42 is made of a transparent material and can transmit the content of the display screen 322. A first light-transmitting area 122 is also provided on the control panel 12, so that the content of the display screen 322 is displayed on the control panel 12. The display screen 322 uses an OLED screen. When the display screen 322 is turned off, the screen shows a natural dark black color, which can provide a better visual experience and save energy consumption.

[0057] In an embodiment of the present invention, a buckle 421 protrudes from the bottom of the screen protection cover 42, a card slot 312 is formed on the board body 31, and the screen protection cover 42 is connected to the card slot 312 through the buckle 421.

[0058] Specifically, the screen protection cover 42 is installed on the board body 31 through the buckle 421. Without tools, the assembly can be quickly completed, it is easy to disassemble, convenient for later maintenance or component replacement, and the buckling part will make the screen protection cover 42 fit more closely to the board body 31 under force, and the connection is more stable.

[0059] In an embodiment of the present invention, the electronic component 32 further includes a display lamp 323, and the display lamp 323 is installed on the board body 31; the protection component 40 further includes a lamp cover 43, and the lamp cover 43 is connected to the board body 31 and covers the display lamp 323; a second light-transmitting area 123 is provided on the control panel 12, and the second light-transmitting area 123 is arranged corresponding to the display lamp 323.

[0060] Specifically, the lamp cover 43 is arranged to cover the outside of the display lamp 323, which can increase the creepage distance. When static electricity enters from the gap between the control panel 12 and the upper cover 11, it needs to pass through a long structural path to reach the position of the display lamp 323, which can effectively reduce the damage caused by static electricity, effectively protect the display lamp 323, enable the display screen 322 to be used normally, and maintain the display performance of the display lamp 323. A positioning post 431 protrudes from the bottom of the lamp cover 43, a hole is formed on the board body 31, and the lamp cover 43 is fixed to the board body 31 by interference connection of the positioning post 431 through the hole, and the connection is convenient.

[0061] A specific embodiment is provided. A touch switch component 321, a display screen 322 and a display lamp 323 are installed on the board body 31. These components are all vulnerable to static electricity damage. Therefore, a key protection part 41, a screen protection cover 42 and a lamp cover 43 are respectively arranged corresponding to the board body 31. The key protection part 41, the screen protection cover 42 and the lamp cover 43 respectively cover the outside of the touch switch component 321, the display screen 322 and the display lamp 323, and the board body 31 equipped with the key protection part 41, the screen protection cover 42 and the lamp cover 43 is assembled in the upper cover 11, so that the protection component 40 forms a protection between the control panel 12 and the electronic component 32.

[0062] If there is no key protection component 41 for protection, static electricity can easily pass through the gap at the key assembly 20 and directly strike the tactile switch component 321 to form an arc, damaging the tactile switch component 321. In the present utility model, static electricity can be made to "crawl" along the surface path of the key protection component 41 to form a gradual voltage drop to protect the tactile switch component 321. Similarly, at the display screen 322, if there is no screen protection cover 42 provided, static electricity directly passes through the gap between the control panel 12 and the upper cover 11 and strikes the display screen 322 to damage the display screen 322. In the present utility model, as Figure 7 , B is the path for static electricity to enter from the gap between the control panel 12 and the upper cover 11 and reach the display screen 322. It can be seen that by adding the screen protection cover 42, the creepage distance can be increased to form effective static electricity protection, and this solution can effectively meet the requirements of air ±15KV discharge.

[0063] In an embodiment of the present utility model, the protection component 40 further includes a light homogenizing film 44, the light homogenizing film 44 is adhesively connected to the surface of the lamp shade 43 facing away from the board body 31, and a third light transmissive area 441 is provided on the light homogenizing film 44, and the third light transmissive area 441 coincides with the second light transmissive area 123.

[0064] Specifically, a light homogenizing film 44 is further provided on the lamp shade 43. The light homogenizing film 44 can improve the uniformity of the light source of the display lamp 323 and the light output quality. The light homogenizing film 44 can disperse and evenly distribute the incident light so that the light reaches a uniform brightness distribution on the output surface. As Figure 8 , by silk-screen printing on the light homogenizing film 44 to set the shapes of the third light transmissive area 441 and the second light transmissive area 123, the light of the display lamp 323 can be formed into a specific required shape.

[0065] The present utility model further provides a light therapy instrument, including the panel structure as described above.

[0066] Specifically, the light therapy instrument has a housing (not shown in the figure) and internal components (not shown in the figure). The panel structure is installed on the housing, and the circuit board assembly 30 and the protection component 40 are both located inside the housing. By increasing the creepage distance through the protection component 40, the electronic components 32 on the board body 31 are protected to ensure that the light therapy instrument can operate safely and stably.

[0067] For the specific structure of the light therapy instrument, refer to the above embodiments. Since the light therapy instrument adopts all the technical solutions of the above all embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one.

[0068] The above are only the preferred embodiments of the present utility model, and do not thus limit the patent scope of the present utility model. Any equivalent structural transformation made under the technical concept of the present utility model by using the content of the specification and drawings of the present utility model, or any direct / indirect application in other related technical fields shall be included within the patent protection scope of the present utility model.

Claims

1. A panel structure, applied to a phototherapy device, characterized in that: include: A housing, the housing comprising an upper cover and a control panel, the upper cover is provided with a mounting hole, and the control panel is mounted in the mounting hole; A circuit board assembly, the circuit board assembly is installed in the upper cover, the circuit board assembly includes a board body and electronic components, the electronic components are installed on the board body and correspond to the control panel; and A protection component is connected to the board body and covers the outside of the electronic component.

2. The panel structure according to claim 1, characterized in that: The control panel is provided with a button hole; The panel structure also includes a button assembly, and the button assembly is installed in the button hole; The electronic component includes a touch switch, and the touch switch is mounted on the board body; The protection component comprises a key protection member, which is connected to the board body and covers the touch switch member, and the key component contacts the switch member through the key protection member.

3. The panel structure according to claim 2, characterized in that: Bosses are protruded on both sides of the key protection piece.

4. The panel structure according to claim 2, characterized in that: An undercut portion is convexly arranged at the bottom of the key protection member, a connecting hole is opened on the plate body, and the key protection member is plugged and connected to the connecting hole through the undercut portion.

5. The panel structure according to claim 2, characterized in that: The key protection member comprises: A main frame, the main frame is arranged outside the touch switch and is provided with an opening; A pressing block, the pressing block is located between the key assembly and the touch switch member and is located in the opening; and An elastic arm is connected to the main frame and the pressing block, and blocks the opening together with the pressing block.

6. The panel structure according to claim 1, characterized in that: The electronic component further comprises a display screen, and the display screen is mounted on the board body; The protection assembly further comprises a screen protection cover, which is connected to the board body and covers the display screen; The control panel is provided with a first light-transmitting area, and the first light-transmitting area is arranged corresponding to the display screen.

7. The panel structure according to claim 6, characterized in that: A buckle is convexly arranged at the bottom of the screen protective cover, and a slot is opened on the plate body, and the screen protective cover is connected to the slot through the buckle.

8. The panel structure according to claim 1, characterized in that: The electronic component further comprises a display light, and the display light is mounted on the board body; The protection assembly further includes a lampshade, which is connected to the plate body and covers the display lamp; The control panel is provided with a second light-transmitting area, and the second light-transmitting area is arranged corresponding to the display light.

9. The panel structure according to claim 8, characterized in that: The protection component also includes a light-distributing film, which is attached to the surface of the lampshade facing away from the plate body. A third light-transmitting area is provided on the light-distributing film, and the third light-transmitting area overlaps with the second light-transmitting area.

10. A phototherapy device, characterized in that: The invention comprises the panel structure as claimed in any one of claims 1 to 9.

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