TWI796584B - Keyboard with light emitting function and touch function - Google Patents

Abstract

A keyboard with light-emitting and touch functions includes a keyswitch, a backlight module having a light source and a light guide plate, a membrane, a capacitive touch sensing sheet disposed on the membrane and the light guide plate, and a board. The keyswitch includes a cap and a support mechanism movably connected to the cap. Light of the light source is incident into the light guide plate and is emitted toward the cap. The membrane has a switch and is selectively disposed on or under the backlight module. The board is disposed under the backlight module and the membrane and has first and second connection members. The first and second connection members pass through the membrane, the light guide plate and the capacitive touch sensing sheet to be movably connected to the support mechanism, so as to make the cap movable downward relative to the board for triggering the switch.

Description

Keyboard with illuminated touch function

The present invention relates to a keyboard, in particular to a keyboard with light-emitting touch function.

With the development of touch-sensing technology, there has been a design of integrating a capacitive touch panel into a keyboard so that the keyboard can have a key control function and a touch-sensing function, thereby improving the convenience of the keyboard in operation. In the prior art, the common configuration is to directly attach the capacitive touch pad to the keycap assembly hole through the corresponding keycap assembly hole. However, this design usually results in time-consuming and labor-intensive assembly process. In addition, if the keyboard adopting the above-mentioned touch configuration is further integrated with the light-emitting key function, the overall structure of the keyboard will be too thick, which is not conducive to the thin design of the keyboard.

Therefore, one of the objectives of the present invention is to provide a keyboard with light-emitting touch function to solve the above problems.

According to an embodiment, the keyboard with light-emitting touch function of the present invention includes a plurality of keys, a backlight module, a thin film circuit board, a capacitive touch panel, and a bottom plate. Each button includes a keycap and a supporting mechanism, and the supporting mechanism is movably connected to the keycap. The backlight module has a light source and a light guide plate. The light source emits light into the light guide plate and emits light from the light guide plate to each keycap. The film circuit board has a switch corresponding to the position of each key cap and is selectively arranged on the backlight module or under the backlight module. The capacitive touch panel is arranged on the film circuit board and the light guide plate. The bottom plate is arranged under the backlight module and the thin film circuit board and has a first connector and a second connector corresponding to each keycap, the first connector and the second connector pass through The thin film circuit board, the light guide plate and the capacitive touch panel are movably connected to the supporting mechanism, so that the keycap can move downward toward the bottom plate for pressing and triggering the switch.

According to another embodiment, the keyboard with light-emitting touch function of the present invention includes a plurality of keys, a backlight module, a thin film circuit board, and a capacitive touch panel. Each button includes a keycap and a supporting mechanism, and the supporting mechanism is movably connected to the keycap. The backlight module has a light source and a light guide plate, and the light guide plate has a first connector and a second connector corresponding to the position of each keycap. The light source emits light into the light guide plate and goes from the light guide plate to the Each keycap shoots out. The film circuit board is arranged under the light guide plate and has a switch corresponding to the position of each keycap. The capacitive touch panel is disposed on the light guide plate and allows the first connecting part and the second connecting part to pass through to be movably connected to the support mechanism, so that the keycap can move downward toward the film circuit board To press and trigger the switch.

According to another embodiment, the keyboard with light-emitting touch function of the present invention includes a plurality of keys, a backlight module, a thin film circuit board, and a capacitive touch layer. Each button includes a keycap and a supporting mechanism, and the supporting mechanism is movably connected to the keycap. The thin film circuit board has a switch corresponding to the position of each key cap. The backlight module is arranged on the film circuit board and has a light source and a light guide plate. The light guide plate has a first connector and a second connector corresponding to the position of each key cap. The first connector and the The second connecting piece is movably connected to the supporting mechanism, so that the keycap can move downward toward the thin film circuit board for pressing and triggering the switch, and the light source emits light into the light guide plate and goes from the light guide plate to each One keycap shoots out. The capacitive touch layer is formed under the light guide plate.

According to another embodiment, the keyboard with light-emitting touch function of the present invention includes a plurality of keys, a backlight module, a thin film circuit board, a capacitive touch panel, and a bottom plate. Each button includes a keycap and a supporting mechanism, and the supporting mechanism is movably connected to the keycap. The backlight module has a light source and a light guide plate. The light source emits light into the light guide plate and emits light from the light guide plate to each keycap. The bottom plate is arranged on the backlight module and has a first connection corresponding to the position of each keycap piece and a second connecting piece. The film circuit board has a switch corresponding to the position of each key cap and is arranged on the bottom board. The capacitive touch panel is disposed on the thin film circuit board, and the thin film circuit board and the capacitive touch panel allow the first connector and the second connector to pass through to be movably connected to the supporting mechanism, so that The keycap can move downward toward the bottom plate to perform the pressing and triggering of the switch.

To sum up, the present invention adopts the configuration of directly stacking the capacitive touch panel on the film circuit board, backlight module and bottom plate to replace the previous design of setting the capacitive touch panel under the keycap, so The present invention can effectively solve the time-consuming and labor-intensive problem of assembling the capacitive touch panel and the keycap mentioned in the prior art, thereby reducing the manufacturing cost of the keyboard.

The advantages and spirit of the present invention can be further understood through the following detailed description of the invention and the accompanying drawings.

10, 100, 150, 200: keyboard

12: Button

14, 102, 202: backlight module

16: Thin film circuit board

18, 18', 18", 18''': capacitive touch pad

20: Bottom plate

22: Keycap

24: Support mechanism

26: Chute

28: card slot

30, 106: the first connecting piece

32, 108: the second connecting piece

34: The first support

36: Second support

38: The first sliding part

40: The first pivot joint

42: Second sliding part

44: Second pivot joint

46: switch

48: light source

50, 104: light guide plate

52: Transparent substrate

54: Touch electrode layer

56: bottom surface

58: Light exit area

60, 60’, 60”: Scattering structure

62: top surface

64: Light-transmitting touch electrode layer

110: fixed end

112: Groove

152: Capacitive touch layer

Fig. 1 is a partial cross-sectional view of a keyboard proposed according to an embodiment of the present invention.

Fig. 2 is a partial cross-sectional diagram of the capacitive touch panel in Fig. 1 .

FIG. 3 is an enlarged schematic diagram of the circuit configuration part of the touch electrode layer in FIG. 2 .

FIG. 4 is a schematic partial cross-sectional view of a capacitive touch panel according to another embodiment of the present invention.

FIG. 5 is a schematic partial cross-sectional view of a capacitive touch panel according to another embodiment of the present invention.

FIG. 6 is a schematic partial cross-sectional view of a capacitive touch panel according to another embodiment of the present invention.

Fig. 7 is a partial cross-sectional view of a keyboard proposed according to another embodiment of the present invention.

Fig. 8 is a partial cross-sectional view of a keyboard proposed according to another embodiment of the present invention.

Fig. 9 is a partial cross-sectional view of a keyboard proposed according to another embodiment of the present invention.

Please refer to FIG. 1, which is a partial cross-sectional schematic diagram of a keyboard 10 proposed according to an embodiment of the present invention. The keyboard 10 has a light-emitting touch function and is preferably a key commonly used in computer devices. Disk, but not limited thereto. For example, the keyboard 10 can also be applied to portable electronic devices (such as notebook computers or folding keyboards) generally having an opening and closing mechanism composed of an upper cover and a lower casing. As shown in FIG. 1 , the keyboard 10 includes a plurality of keys 12 (only one is shown in FIG. 1 , but not limited thereto), a backlight module 14 , a thin film circuit board 16 , and a capacitive touch panel 18 , and a bottom plate 20. The key 12 is disposed on the bottom plate 20 for the user to press to perform the key function that the user wants to input.

The button 12 includes a keycap 22 and a support mechanism 24, the support mechanism 24 is movably connected to the keycap 22, and in more detail, the support mechanism 24 can preferably adopt a scissors foot bracket structure design (but not subject to this requirement). limited, it can also adopt other key support structure designs, such as butterfly support structure design, etc.). For example, in this embodiment, the keycap 22 has a sliding slot 26 and a card slot 28, the bottom plate 20 has a first connecting piece 30 and a second connecting piece 32 at the position corresponding to the keycap 22, and the supporting mechanism 24 It includes a first support member 34 and a second support member 36 , the second support member 36 is cross-jointed with the first support member 34 . The first supporting part 34 has a first sliding part 38 and a first pivot part 40. When the first supporting part 34 is assembled, the first sliding part 38 is slidably arranged in the slide groove 26, and the first pivoting part 40 The portion 40 is rotatably pivoted in the second connecting member 32 . The second supporting part 36 has a second sliding part 42 and a second pivot part 44. When the second supporting part 36 is assembled, the second sliding part 42 is slidably arranged in the first connecting part 30, and the second The pivot portion 44 is rotatably pivoted in the slot 28 . In this way, through the above structural connection design, the keycap 22 can move up and down relative to the bottom plate 20 through the supporting mechanism 24 .

In addition, the backlight module 14 is arranged on the base plate 20, and the position of the film circuit board 16 corresponding to each key cap 22 has a switch 46 and is arranged on the backlight module 14. The backlight module 14 has a light source 48 (preferably Be a light-emitting diode, but not limited thereto) and a light guide plate 50, the light source 48 can preferably be arranged on one side of the light guide plate 50 (but not limited thereto, it can also be accommodated in the light guide plate 50 design) to emit light into the light guide plate 50 and emit from the light guide plate 50 to each keycap 22 so that the keyboard 10 can have a key light-emitting function, and it can be seen from the foregoing description and FIG. 1 that the first connecting member 30 and The second connecting member 32 passes through the film circuit board 16, the light guide plate 50 and the capacitive touch panel 18 to be movably connected to the supporting mechanism 24, so that the key The cap 22 can move downward toward the bottom plate 20 to trigger the switch 46 to be pressed, and then execute the key function that the user wants to input. It should be noted that, in another embodiment, the present invention may also adopt a design in which the thin film circuit board 16 is disposed between the backlight module 14 and the bottom plate 20, and the relevant description may be deduced by referring to the above description, and will not be repeated here. .

The following is a detailed description of the design of the capacitive touch panel 18, please refer to the first figure, the second figure, and the third figure, as shown in the first figure, the second figure, and the third figure, the capacitive touch The control sheet 18 is used to provide touch signals to the computer device used by the keyboard 10 for the user to perform related touch operations (such as moving the cursor, etc.). The capacitive touch sheet 18 includes a light-transmitting substrate 52 and The touch electrode layer 54, the touch electrode layer 54 (its XY axis sensing electrode configuration is shown in Figure 3, and its related description is common in the prior art, so it will not be repeated here) is formed on one of the light-transmitting substrates 52 The bottom surface 56 has a light exit area 58 corresponding to the position of each keycap 22, and a scattering structure 60 is formed at the position corresponding to the light exit area 58 of the light-transmitting substrate 52 (it can adopt common optical scattering microstructure design, such as dots, sawtooth, grooves , embossed microstructure or a combination thereof, but not limited thereto), in this embodiment, the scattering structure 60 can be formed in the light exit area 58 (that is, the scattering structure 60 and the touch panel as shown in FIG. 3 The electrode layer 54 is located on the same layer), whereby the light emitted from the light guide plate 50 can pass through the light exit area 58 and be scattered at the scattering structure 60 to guide the light to the corresponding keycap 22, thereby generating key lighting effect.

To sum up, the present invention adopts the configuration of directly stacking the capacitive touch panel on the film circuit board, backlight module and bottom plate to replace the previous design of setting the capacitive touch panel under the keycap, so The present invention can effectively solve the time-consuming and labor-intensive problem of assembling the capacitive touch panel and the keycap mentioned in the prior art, thereby reducing the manufacturing cost of the keyboard. In addition, through the above-mentioned design of forming the scattering structure on the capacitive touch panel, the light emitted by the backlight module can be more evenly incident on the keycap, thereby effectively improving the key luminous effect of the keyboard and the efficiency of light use .

In practical applications, the design of the capacitive touch panel is not limited to the above-mentioned embodiments. For example, please refer to FIG. 4, which is a capacitive touch panel 18' proposed according to another embodiment of the present invention. Partial cross-sectional schematic diagrams, the components described in this embodiment and the components described in the above embodiments have the same number, indicating that they have similar functions or structures, and will not be repeated here. As shown in FIG. 4, the capacitive touch panel 18' includes a light-transmitting substrate 52 and a touch electrode layer 54, and a scattering structure 60' is formed on the light-transmitting substrate 52 corresponding to the light-emitting area 58 (which can adopt a common optical scattering microstructure). Structural design, such as dots, sawtooth, grooves, embossed microstructures or combinations thereof, but not limited thereto), in this embodiment, the scattering structure 60' can be formed on a top surface 62 of the light-transmitting substrate 52 (That is, the scattering structure 60' and the touch electrode layer 54 as shown in FIG. 4 are located in different layers), whereby the light emitted from the light guide plate 50 can pass through the light exit area 58 and be scattered at the scattering structure 60' The light is directed to the corresponding key cap 22, thereby producing the key lighting effect.

In another embodiment, please refer to FIG. 5, which is a schematic partial cross-sectional view of a capacitive touch panel 18" according to another embodiment of the present invention. The components described in this embodiment are the same as those described above. The components with the same number as mentioned in the examples mean that they have similar functions or structures, and will not be repeated here. As shown in FIG. 5, the capacitive touch panel 18" includes a light-transmitting substrate 52 and a touch electrode layer 54 A scattering structure 60 "is formed on the light-transmitting substrate 52 corresponding to the position of the light-exiting area 58. In this embodiment, the scattering structure 60" is a curved scattering structure protruding from the top surface 62 of the light-transmitting substrate 52, thereby, from The light emitted from the light guide plate 50 can pass through the light exit area 58 and be scattered at the scattering structure 60 ″ to guide the light to the corresponding key cap 22 , thereby generating the key luminous effect.

In another embodiment, please refer to FIG. 6, which is a schematic partial cross-sectional view of a capacitive touch panel 18''' according to another embodiment of the present invention. The components described in this embodiment are the same as The elements with the same number in the above embodiments indicate that they have similar functions or structures, and will not be repeated here. As shown in FIG. 6, the capacitive touch panel 18''' includes a light-transmitting substrate 52 and a light-transmitting touch electrode layer 64. The light-transmitting touch electrode layer 64 (preferably made of indium tin oxide (Indium Tin Oxide) Oxide, ITO) material, but not limited thereto) is formed on the bottom surface 56 of the light-transmitting substrate 52, and the light-transmitting substrate 52 can form a scattering structure 60 at the position corresponding to the light incident on each keycap 22, thereby, from The light emitted from the light guide plate 50 can be scattered at the scattering structure 60 to guide the light to the corresponding key cap 22 , thereby generating the effect of lighting the keys.

It is worth mentioning that the design of the capacitive touch panel and the backlight module is not limited to the above-mentioned embodiments. For example, please refer to FIG. 7, which is a keyboard 100 according to another embodiment of the present invention. Partial cross-sectional schematic diagrams, the elements described in this embodiment are numbered the same as those in the above embodiments, indicating that they have similar functions or structures, and will not be repeated here. As shown in Figure 7, the keyboard 100 includes a plurality of keys 12 (only one is shown in Figure 7, but not limited thereto), a backlight module 102, a thin film circuit board 16 and a capacitive touch panel 18, the backlight The module 102 has a light source 48 and a light guide plate 104. The light guide plate 104 has a first connector 106 and a second connector 108 corresponding to each keycap 22. The thin film circuit board 16 is arranged under the light guide plate 104 and A switch 46 is provided at a position corresponding to each keycap 22 , and the capacitive touch panel 18 is disposed on the light guide plate 104 . In this embodiment, the first connector 106 and the second connector 108 can preferably be connected to the light guide plate 104 by embedding injection or thermoplastic molding (but not limited thereto, other connections can also be used. Design, such as structural snap or riveting design, etc.), for example, the first connecting member 106 can have a fixed end 110, the light guide plate 104 forms a groove 112 at the position of the fixed end 110, the fixed end 110 is It can be accommodated in the groove 112 (for example, by structural engagement or riveting) to fix the first connecting member 106 to the light guide plate 104 . In this way, the capacitive touch panel 18 can be used to provide touch signals to the computer device used by the keyboard 100 for the user to perform related touch operations (such as moving the cursor, etc.), and the light emitted by the light source 48 The light can be emitted from the light guide plate 104 to each keycap 22 so that the keyboard 100 can have the key lighting function, and it can be seen from FIG. 7 that the first connector 30 and the second connector 32 pass through the capacitive touch panel. 18 is movably connected to the support mechanism 24, so that the keycap 22 can move downward toward the film circuit board 16 to trigger the pressing of the switch 46, and then execute the key function that the user wants to input.

In this embodiment, the present invention superimposes the capacitive touch panel on the backlight module to replace the design of the prior art where the capacitive touch panel is placed under the keycap, and the first connecting piece and the second connecting piece The components are directly arranged on the light guide plate to omit the configuration of the bottom plate. Therefore, the present invention can effectively solve the time-consuming and labor-intensive assembly process of the capacitive touch panel and the keycap mentioned in the prior art and the overall structure of the light-emitting touch keyboard. Thick problem, thereby reducing the manufacturing cost of the keyboard and conducive to the thin design of the keyboard. As for For other related designs of the keyboard 100 (such as the design of the capacitive touch panel and the scattering structure, etc.), it can be deduced by referring to the above-mentioned embodiments, and will not be repeated here.

In addition, please refer to FIG. 8, which is a partial cross-sectional schematic diagram of a keyboard 150 according to another embodiment of the present invention. The components described in this embodiment are the same as those described in the above embodiment. , which means that they have similar functions or structures, and will not be repeated here. As shown in FIG. 8, the keyboard 150 includes a plurality of keys 12 (only one is shown in FIG. 8, but not limited thereto), a backlight module 102, a thin film circuit board 16, and a capacitive touch layer 152. The type touch layer 152 (the configuration of the XY-axis sensing electrodes can be analogized with reference to FIG. 3 , and will not be repeated here) is formed under the light guide plate 104 to provide touch signals to the computer device used by the keyboard 150, so as to It is used for users to perform relevant touch operations (such as moving a cursor, etc.). In this embodiment, the present invention forms the capacitive touch layer directly under the light guide plate of the backlight module, so as to further reduce the thickness of the overall structure of the keyboard 150 and facilitate the thinner design of the keyboard 150 . As for other related designs for the keyboard 150 (such as the design of the capacitive touch panel and the scattering structure, the design of the connector of the light guide plate, etc.), it can be deduced by referring to the above-mentioned embodiments, and will not be repeated here.

In addition, please refer to FIG. 9, which is a partial cross-sectional schematic diagram of a keyboard 200 according to another embodiment of the present invention. The components described in this embodiment have the same numbers as the components described in the above embodiment, indicating They have similar functions or structures, which will not be repeated here. As shown in FIG. 9, the keyboard 200 includes a plurality of keys 12 (only one is shown in FIG. 9, but not limited thereto), a backlight module 202, a thin film circuit board 16, a capacitive touch panel 18, and The base plate 20, the backlight module 202 is arranged under the base plate 20 and has a light source 48 and a light guide plate 50, whereby the light source 48 can emit light into the light guide plate 50 and emit light from the light guide plate 50 to each keycap 22 so that The keyboard 200 can have a button light-emitting function, and it can be seen from the foregoing description and FIG. The mechanism 24 enables the keycap 22 to move downward toward the bottom plate 20 to press and trigger the switch 46 , and then execute the key function that the user wants to input. As for other relevant designs for the keyboard 200 (such as the design of the capacitive touch panel and the scattering structure, etc.), it can refer to the above-mentioned embodiments. Push, no more details here.

The above descriptions are only preferred embodiments of the present invention, and all equivalent changes and modifications made according to the scope of the patent application of the present invention shall fall within the scope of the present invention.

10: keyboard

12: Button

14:Backlight module

16: Thin film circuit board

18: Capacitive touch panel

20: Bottom plate

22: Keycap

24: Support mechanism

26: Chute

28: card slot

30: The first connector

32: Second connector

34: The first support

36: Second support

38: The first sliding part

40: The first pivot joint

42: Second sliding part

44: Second pivot joint

46: switch

48: light source

50: Light guide plate

Claims (13)

A keyboard with luminescent touch function, which includes: a plurality of keys, each key includes a key cap and a support mechanism, and the support mechanism is movably connected to the key cap; a backlight module, which has a light source and A light guide plate, the light source emits light into the light guide plate and emits from the light guide plate to each keycap; a thin film circuit board, which has a switch corresponding to the position of each keycap and is selectively arranged on the backlight module set or arranged under the backlight module; a capacitive touch panel, which is arranged on the thin film circuit board and the light guide plate; and a bottom plate, which is arranged under the backlight module and the thin film circuit board and corresponds to The position of each keycap has a first connecting piece and a second connecting piece, and the first connecting piece and the second connecting piece pass through the film circuit board, the light guide plate and the capacitive touch panel to be movable The ground is connected to the supporting mechanism, so that the keycap can move downward toward the bottom plate to perform the pressing and triggering of the switch. A keyboard with luminescent touch function, which includes: a plurality of keys, each key includes a key cap and a support mechanism, and the support mechanism is movably connected to the key cap; a backlight module, which has a light source and A light guide plate, the light guide plate has a first connecting piece and a second connecting piece corresponding to the position of each keycap, the light emitted by the light source enters the light guide plate and is emitted from the light guide plate to each keycap; a thin film A circuit board, which is arranged under the light guide plate and has a switch corresponding to the position of each keycap; and a capacitive touch panel, which is arranged on the light guide plate and allows the first connecting member and the second connecting member pierced to be movably connected to the support mechanism, so that the keycap can face the thin film circuit board The light guide plate is arranged between the film circuit board and the capacitive touch panel by moving downward to trigger the switch. A keyboard with light-emitting touch function, which includes: a plurality of keys, each key includes a key cap and a support mechanism, the support mechanism is movably connected to the key cap; a thin film circuit board, which corresponds to each key There is a switch at the position of the cap; a backlight module, which is arranged on the film circuit board and has a light source and a light guide plate, and the light guide plate has a first connector and a second connection corresponding to the position of each key cap part, the first connecting part and the second connecting part are movably connected to the supporting mechanism, so that the keycap can move downward toward the film circuit board to press and trigger the switch, and the light source emits light into the guide and a capacitive touch layer formed under the light guide plate and located between the light guide plate and the film circuit board. A keyboard with luminescent touch function, which includes: a plurality of keys, each key includes a key cap and a support mechanism, and the support mechanism is movably connected to the key cap; a backlight module, which has a light source and A light guide plate, the light source emits light into the light guide plate and emits from the light guide plate to each keycap; a bottom plate, which is arranged on the backlight module and has a first connector at the position corresponding to each keycap And a second connector; a thin film circuit board, which has a switch corresponding to the position of each keycap and is arranged on the bottom plate; and A capacitive touch panel, which is arranged on the thin film circuit board, and the bottom plate is arranged between the light guide plate and the thin film circuit board, and the thin film circuit board and the capacitive touch panel allow the first connecting member and the The second connecting piece passes through to be movably connected to the supporting mechanism, so that the keycap can move downward toward the bottom plate for pressing and triggering the switch. The keyboard as described in claim 1, 2 or 4, wherein the capacitive touch panel includes a light-transmitting substrate and a touch electrode layer, the touch electrode layer is formed on a bottom surface of the light-transmitting substrate and corresponds to each The position of the keycap has a light-emitting area, and the light-transmitting substrate forms a scattering structure corresponding to the position of the light-emitting area, so that the light emitted from the light guide plate passes through the light-emitting area and scatters at the scattering structure to radiate to the corresponding keycap. The keyboard according to claim 5, wherein the scattering structure is formed in the light emitting area or on a top surface of the light-transmitting substrate. The keyboard according to claim 6, wherein the scattering structure is a curved scattering structure protruding from the top surface. The keyboard as described in claim 1, 2 or 4, wherein the capacitive touch panel includes a light-transmitting substrate and a light-transmitting touch electrode layer, and the light-transmitting touch electrode layer is formed on a bottom surface of the light-transmitting substrate , the light emitted from the light guide plate passes through the light-transmitting touch electrode layer and the light-transmitting substrate to each keycap. The keyboard according to claim 8, wherein the light-transmitting substrate forms a scattering structure corresponding to the position where the light irradiates each keycap. The keyboard according to claim 2 or 3, wherein the first connecting part and the second connecting part are connected to the light guide plate by embedding injection or thermoplastic molding. The keyboard as described in claim 10, wherein the first connecting member has a fixed end, and the light guide plate forms a groove at the position of the fixed end, and the fixed end is accommodated in the groove so that the The first connecting part is fixed on the light guide plate. The keyboard as claimed in claim 1, 2, 3 or 4, wherein the light source is disposed on one side of the light guide plate or accommodated in the light guide plate. The keyboard according to claim 1, 2, 3 or 4, wherein the supporting mechanism is selected from a scissors-leg structure or a butterfly support structure.

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