CN111276059B - Connecting device, panel assembly and splicing type display equipment - Google Patents
Connecting device, panel assembly and splicing type display equipment Download PDFInfo
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- 238000009434 installation Methods 0.000 claims abstract description 15
- 230000003044 adaptive effect Effects 0.000 claims description 50
- 238000005452 bending Methods 0.000 claims description 10
- 230000000712 assembly Effects 0.000 claims description 5
- 238000000429 assembly Methods 0.000 claims description 5
- 230000001154 acute effect Effects 0.000 claims description 3
- 210000004712 air sac Anatomy 0.000 claims 1
- 238000012423 maintenance Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
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- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/302—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements characterised by the form or geometrical disposition of the individual elements
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/302—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements characterised by the form or geometrical disposition of the individual elements
- G09F9/3026—Video wall, i.e. stackable semiconductor matrix display modules
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Abstract
The invention relates to a connecting device, a panel assembly and a spliced display device, wherein the connecting device comprises a first connecting piece, a second connecting piece and a third connecting piece, wherein the first connecting piece is provided with a guiding section and a mounting section which are arranged in sequence; the second connecting piece, the cover is located the guide section and with guide section sliding connection, the second connecting piece is provided with the guiding groove, the bulge stretches into the guiding groove and slides in the guiding groove and sets up, the one end that the installation section was kept away from to the second connecting piece is connected to the object of treating the connection. The self-adaptation telescopic element, the self-adaptation telescopic element has stiff end and slip end, and the slip end is connected in the bulge, and the stiff end is used for being connected to the object of waiting to connect, and under the first state, the self-adaptation telescopic element, wait to connect and form the force balance between object and the first spacing portion, under the second state, the self-adaptation telescopic element, wait to connect and form the force balance between object and the spacing portion of second. The invention can meet the requirement of connection between the panel and the mounting frame, and has simple structure and easy panel replacement.
Description
Technical Field
The invention relates to the technical field of multi-screen splicing installation, in particular to a connecting device, a panel assembly and splicing type display equipment.
Background
The tiled display device, as a modern video tool, has the advantages of long time without failure, low maintenance cost, high resolution, long service life, etc., and has been widely applied to various fields, such as large-scale post and telecommunications communication systems, broadcast television shows, security monitoring, military command, industrial process control, traffic management command, communication network management, energy distribution and transportation, etc.
The spliced display equipment is usually formed by sequentially splicing a plurality of independent panels to form a large display screen, and when any one of the panels on the spliced display equipment is damaged, only the damaged panel needs to be replaced, so that the maintenance cost is low. However, the connecting device for connecting the panel and the mounting frame in the prior art is complicated in structure and is not conducive to replacement of the panel.
Therefore, a new connecting device, a panel assembly and a tiled display apparatus are needed.
Disclosure of Invention
The embodiment of the invention provides a connecting device, a panel assembly and a splicing type display device.
In one aspect, a connecting device is provided according to an embodiment of the present invention, including: a first connecting member having a guide section and a mounting section which are arranged in succession, the guide section having a projection on an outer edge thereof; the second connecting piece is sleeved on the guide section and is in sliding connection with the guide section, a guide groove is formed in the outer edge of the second connecting piece, the protruding part extends into the guide groove and is arranged in the guide groove in a sliding mode, and one end, far away from the installation section, of the second connecting piece is connected to an object to be connected; the connecting device or the whole body formed by connecting the connecting device and the object to be connected is provided with a first limiting part and a second limiting part which are oppositely arranged in a first direction, and the first direction is the extending direction of the guide groove; the self-adaptive telescopic element is provided with a fixed end and a sliding end, the sliding end is connected to the protruding part, the fixed end is connected to an object to be connected, the sliding end is provided with a first self-locking position and a second self-locking position which are sequentially arranged along a first direction in the guide groove, the distance between the first self-locking position and the second self-locking position is larger than zero, wherein,
the operative state of the connection device comprises a first state and a second state,
in a first state, force balance is formed among the self-adaptive telescopic element, the object to be connected and the first limiting part, so that the sliding end is limited at a first self-locking position;
and in the second state, force balance is formed among the self-adaptive telescopic element, the object to be connected and the second limiting part, so that the sliding end is limited at a second self-locking position.
According to an aspect of the embodiment of the present invention, in the first state, a component force of the acting force of the adaptive telescopic element on the projection in the first direction is greater than zero; in the second state, the component force of the acting force of the self-adaptive telescopic element on the protruding part in the first direction is greater than zero; and the component force direction of the acting force of the self-adaptive telescopic element on the protruding part in the first direction in the first state is opposite to the component force direction of the acting force of the self-adaptive telescopic element on the protruding part in the first direction in the second state.
According to an aspect of an embodiment of the invention, the connecting device further comprises an intermediate state in which a component force of the acting force of the adaptive telescopic element on the projection in the first direction is equal to zero, the connecting device passing through the intermediate state during the mutual switching of the first state and the second state; from the first state to the intermediate state, the component force of the acting force of the self-adaptive telescopic element on the protruding part in the first direction is gradually reduced, and from the intermediate state to the second state, the component force of the acting force of the self-adaptive telescopic element on the protruding part in the first direction is gradually increased.
According to an aspect of the embodiment of the present invention, the adaptive telescopic element includes a supporting part and an elastic part, which are connected to each other, wherein an end of the supporting part away from the elastic part is a fixed end, an end of the supporting part close to the elastic part is located in a region between the first self-locking position and the second self-locking position and is rotatably connected to the elastic part, and an end of the elastic part away from the supporting part is a sliding end.
According to an aspect of the embodiment of the present invention, the end of the supporting member near the elastic member is rotatably connected to the elastic member by a hinge shaft, and the distances of the hinge shaft projected to the first and second position-limiting portions in the direction perpendicular to the first direction on the second connecting member are the same.
According to an aspect of the embodiment of the present invention, in the first self-locking position, a first included angle is formed between the supporting member and the elastic member, and the first included angle is an obtuse angle; and in the second self-locking position, a second included angle is formed between the supporting piece and the elastic piece, and the second included angle is an acute angle.
According to an aspect of the embodiment of the present invention, the elastic member includes an elastic element, and the elastic element is one of a spring, a rubber pad, and an air bag.
According to an aspect of the embodiment of the present invention, the elastic member further includes a bending-resistant member, the elastic member is connected with at least one of the support member and the protrusion portion through the bending-resistant member, the bending-resistant member includes a sleeve member and a rod member slidably connected with the sleeve member, and one end of the elastic member is connected to the sleeve member and the other end is connected to the rod member.
According to an aspect of the embodiment of the present invention, the elastic member is fitted around the outer circumference of the bending resistant member; alternatively, the resilient element is located inside the sleeve.
According to an aspect of the embodiment of the present invention, the elastic member includes a plurality of connecting rods and an elastic element, the plurality of connecting rods are sequentially rotatably connected, a telescopic direction of the elastic element intersects with the first direction, and both ends of the elastic element in the telescopic direction are respectively connected to the connecting rods; the connecting rods comprise a first group and a second group, in the first self-locking position, the connecting rods of the first group are positioned on one side, close to the object to be connected, of the elastic element in the first direction, and the connecting rods of the second group are positioned on one side, close to the mounting section, of the elastic element in the first direction; in the second self-locking position, the connecting rods of the first group are positioned on one side, close to the mounting section, of the elastic element in the first direction, and the connecting rods of the second group are positioned on one side, close to the object to be connected, of the elastic element in the first direction; or in the second self-locking position, the connecting rods of the first group and the connecting rods of the second group are both positioned on one side of the elastic element close to the object to be connected in the first direction.
According to an aspect of the embodiment of the present invention, the number of the connecting rods is four, the end portions of two adjacent connecting rods are hinged to each other through the rotating shaft, one end of the elastic element in the telescopic direction is connected to one of the rotating shafts, and the other end of the elastic element is connected to another non-adjacent rotating shaft.
According to an aspect of the embodiment of the present invention, in the first direction, the guide groove is a closed groove, one end of the wall portion enclosing the guide groove in the first direction is a first stopper portion, and the other end is a second stopper portion; or, in the first direction, the guide groove runs through the end face of the second connecting piece far away from the installation section, one end of the wall portion which encloses to form the guide groove and is close to the installation section is a first limiting portion, and the end face of the second connecting piece far away from the installation section is a second limiting portion.
According to an aspect of the embodiment of the present invention, in the first direction, the guiding groove penetrates through an end surface of the second connecting member away from the mounting section, the guiding section includes a cylindrical plug body and a fixing sleeve that is sleeved on the plug body and detachably connected to the plug body, and each protruding portion is disposed on the fixing sleeve.
According to one aspect of the embodiment of the present invention, the number of the protruding parts is at least two, the distance between any two adjacent protruding parts is the same along the outer edge of the guide section, the number of the guide grooves is not less than the number of the protruding parts, and each protruding part is in sliding fit with one of the guide grooves; the number of adaptive telescopic elements is the same as the number of projections, and the sliding end of each adaptive telescopic element is connected to one of the projections.
According to one aspect of the embodiment of the invention, the guide section and the mounting section are arranged in an intersecting manner, and the included angle between the guide section and the mounting section is 75-105 degrees.
According to an aspect of the embodiment of the present invention, the connecting device further includes a third connecting member detachably connected to the mounting section, wherein one of the mounting section and the third connecting member is a socket sleeve and the other is a socket rod.
According to an aspect of an embodiment of the present invention, the insertion sleeve includes a sleeve body and a guide portion, the guide portion is in a semi-open horn shape and is connected to an end of the sleeve body, and a cross-sectional size of the guide portion is gradually increased along a direction in which the sleeve body is directed to the guide portion.
In another aspect, according to an embodiment of the present invention, there is provided a panel assembly including: the above-mentioned connecting device; the back side of the panel is connected with one of the first connecting piece and the second connecting piece.
In another aspect, a tiled display device is provided according to an embodiment of the present invention, including: a mounting frame; in the panel assembly, the number of the panel assemblies is a plurality of panels, the panels of the panel assemblies are spliced with one another, each panel assembly is connected to the mounting frame through the other one of the first connecting piece and the second connecting piece, and the object to be connected is a panel or the mounting frame.
According to the connecting device, the panel assembly and the tiled display device provided by the embodiment of the invention, the protruding part on the guiding section of the first connecting piece can extend into and be connected with the guiding groove of the second connecting piece in a sliding manner, so that the sliding end of the adaptive telescopic element can be connected with the first connecting piece through the protruding part, when the connecting device is used for connecting the panel and the mounting frame, the fixed end of the second connecting piece and the fixed end of the adaptive telescopic element can be connected with one of the panel and the mounting frame, the first connecting piece is connected with the other of the panel and the mounting frame, the first self-locking position and the second self-locking position which are sequentially arranged along the first direction are arranged in the guiding groove by limiting the sliding end, and in the second state, the force balance is formed among the adaptive telescopic element, the object to be connected and the second limiting part, so that the sliding end is limited at the first self-locking position, the first connecting piece and the second connecting piece are prevented from moving relatively, and therefore the panels are flush. And when one of the panels needs to be replaced or maintained, an initial acting force is provided to adsorb the panel through external force, so that the connecting device is switched to a first state under the action of the self-adaptive telescopic element, and because under the first state, the self-adaptive telescopic element, the object to be connected and the second limiting part form force balance, so that the sliding end is limited at a first self-locking position, and further the panel keeps protruding out of other panels, and the panel is easy to replace or maintain without additionally arranging a locking part, so that the connecting device is simple in overall structure and low in cost.
Drawings
Features, advantages and technical effects of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is a schematic structural diagram of a tiled display apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of a panel assembly according to one embodiment of the present invention;
FIG. 3 is an exploded schematic view of a panel assembly of one embodiment of the present invention;
FIG. 4 is a schematic structural view of a coupling device according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a connection device according to one embodiment of the present invention switching between a first state, an intermediate state, and a second state;
FIG. 6 is a schematic structural diagram of a connecting device according to an embodiment of the present invention, which is switched from a first state to a second state;
FIG. 7 is a schematic structural diagram of a first connector in accordance with one embodiment of the present invention;
FIG. 8 is a schematic structural view of a second connector according to an embodiment of the present invention;
FIG. 9 is a schematic view of the structure of the elastic member according to one embodiment of the present invention;
FIG. 10 is a schematic structural view of a flexure resistant member of an embodiment of the present invention;
FIG. 11 is an exploded view of a flexure resistant member of an embodiment of the present invention;
FIG. 12 is a schematic view of the construction of a coupling device according to another embodiment of the present invention;
FIG. 13 is a schematic structural diagram of an adaptive telescopic element according to another embodiment of the present invention;
FIG. 14 is a schematic diagram illustrating a connection structure of a connection device switching from a first state to a second state according to another embodiment of the present invention;
FIG. 15 is a schematic view of the structure of a resilient member according to yet another embodiment of the present invention;
FIG. 16 is a schematic structural view of a connecting device according to yet another embodiment of the present invention;
FIG. 17 is a schematic view of a coupling device according to yet another embodiment of the present invention in a second state;
FIG. 18 is a schematic structural view of a second connector according to yet another embodiment of the present invention;
fig. 19 is a schematic view of the mating of a connection device with a panel and a mounting frame according to yet another embodiment of the invention.
Wherein:
100-a connecting means;
10-a first connector; 11-a guide section; 111-a projection; 112-a plug body; 113-a fixation sleeve; 12-a mounting section;
20-a second connector; 21-a guide groove;
30-an adaptive telescopic element; 30 a-fixed end; 30 b-sliding end; 30 c-a first self-locking position; 30 d-a second self-locking position;
31-a support; 32-an elastic member; 321-a resilient element; 322-a flexure-resistant member; 322 a-kit; 322 b-a rod member; 323-connecting rod; 323 a-first group; 323 b-second group; 324-a rotating shaft; 33-articulated shaft;
40-a third connector; 41-set of body; 42-a guide;
200-a panel; 300-a mounting frame;
x-a first direction; 100 a-a first limit portion; 100 b-a second stop.
In the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention. In the drawings and the following description, at least some well-known structures and techniques have not been shown in detail in order to avoid unnecessarily obscuring the present invention; also, the dimensions of some of the structures may be exaggerated for clarity. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
The following description will be given with reference to the orientation words as shown in the drawings, and will not be construed as limiting the specific structure of the connecting device, the panel assembly and the tiled display apparatus of the present invention. In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as either a fixed connection, a removable connection, or an integral connection; can be directly connected or indirectly connected. The specific meaning of the above terms in the present invention can be understood as appropriate to those of ordinary skill in the art.
For a better understanding of the present invention, the connecting device, the panel assembly and the tiled display apparatus according to the embodiment of the present invention will be described in detail below with reference to fig. 1 to 19.
Referring to fig. 1, an embodiment of the invention provides a tiled display device, including: installation frame 300 and panel components, every panel component is connected with installation frame 300 respectively, and the quantity of panel components is a plurality of, and a plurality of panel components splice each other in order to constitute concatenation formula display device.
Referring to fig. 2, an embodiment of the invention provides a novel panel assembly, which can be used in the tiled display device of the above embodiment and is a component of the display device. The panel assembly according to an embodiment of the present invention includes a panel 200 and a connection device 100, wherein a back side of the panel 200 is connected to the connection device 100, and when the panel assembly is applied to a tiled display device, the panel 200 is connected to a mounting frame 300 through the connection device 100.
In order to better satisfy the requirement of connection between the panel 200 and the mounting frame 300 and facilitate maintenance or replacement of the failed panel 200 when a single panel 200 fails, alternatively, the embodiment of the present invention further provides a novel connection device 100, and the connection device 100 can be produced and sold separately as a separate component, and of course, can also be used for the panel assembly of the above embodiment and be used as a component of the panel assembly.
Referring to fig. 2 to 4, a connecting device 100 according to an embodiment of the present invention includes a first connecting member 10, a second connecting member 20, and an adaptive telescopic element 30. The first connecting part 10 has a guide section 11 and a mounting section 12 arranged one behind the other, the guide section 11 having a projection 111 on its outer edge. The second connecting piece 20 is sleeved on the guiding section 11 and is slidably connected with the guiding section 11, the second connecting piece 20 is provided with a guiding groove 21 on the outer edge of the second connecting piece, the protruding part 111 extends into the guiding groove 21 and is slidably arranged in the guiding groove 21, and one end of the second connecting piece 20, which is far away from the mounting section 12, is connected to an object to be connected.
The connection device 100 or the whole body formed by connecting the connection device 100 and the object to be connected has a first position-limiting part 100a and a second position-limiting part 100b which are oppositely arranged in a first direction X, and the first direction X is the extending direction of the guide groove 21. The adaptive telescopic element 30 has a fixed end 30a and a sliding end 30b, the sliding end 30b is connected to the protruding portion 111, the fixed end 30a is used for being connected to an object to be connected, the sliding end 30b has a first self-locking position 30c and a second self-locking position 30d arranged in the guide groove 21 in sequence along the first direction X, a distance between the first self-locking position 30c and the second self-locking position 30d is greater than zero, wherein the working state of the connection device 100 includes a first state and a second state.
In the first state, a force balance is formed among the adaptive telescopic element 30, the object to be connected and the first position-limiting part 100a, so that the sliding end 30b is limited at the first self-locking position 30 c. In the second state, a force balance is formed among the adaptive telescopic element 30, the object to be connected and the second position-limiting portion 100b, so that the sliding end 30b is limited at the second self-locking position 30 d.
The above-mentioned object to be connected may be the panel 200 or the mounting frame 300. When the connection device 100 according to the embodiment of the present invention is applied to a panel assembly, the back side of the panel 200 and the fixed end 30a of the adaptive telescopic element 30 may be connected to one of the first connection element 10 and the second connection element 20, and the mounting frame 300 may be connected to the other of the first connection element 10 and the second connection element 20. Because the sliding end 30b has the first self-locking position 30c and the second self-locking position 30d which are sequentially arranged along the first direction X in the guide groove 21, and in the second state, a force balance is formed between the self-adaptive telescopic element 30, the object to be connected and the second limiting portion 100b, so that the sliding end 30b is limited at the second self-locking position 30d, the relative movement of the first connecting piece 10 and the second connecting piece 20 can be avoided in the second state, and further, each panel 200 of the tiled display device is flush, and the display requirement of the tiled display device is ensured.
When one of the panels 200 is out of order and needs to be replaced or maintained, the panel 200 can be absorbed by external force, so that the connecting device 100 is switched from the second state to the first state, and in the first state, a force balance is formed among the adaptive telescopic element 30, the object to be connected and the first limiting part 100a, so that the sliding end 30b is limited at the first self-locking position 30c, and the panel 200 is kept protruding out of the other panels 200, so that the panel is easy to replace or maintain, simple in structure and low in cost.
Referring to fig. 5, as an alternative embodiment, in the first state, the component force F1 of the acting force of the adaptive telescopic element 30 on the protrusion 111 in the first direction X is greater than zero. In the second state, the component force F2 of the acting force of the adaptive telescopic element 30 on the protrusion 111 in the first direction X is greater than zero. And the component force direction of the acting force F1 of the adaptive telescopic element 30 on the convex part 111 in the first state in the first direction X is opposite to the component force direction F2 of the acting force of the adaptive telescopic element 30 on the convex part 111 in the first direction X in the second state.
Through the arrangement, the convex part 111 can be limited at the corresponding self-locking position by utilizing the component force of the adaptive telescopic element 30 in the first direction X in the first state and the second state of the connecting device, and the relative positions of the first connecting piece 10 and the second connecting piece 20 can be stabilized in the first state and the second state without additionally arranging corresponding locking components, thereby further simplifying the structure of the connecting device 100.
Referring to fig. 5 and fig. 6, in some alternative embodiments, the connection device 100 provided in the above embodiments further includes an intermediate state, in which the component force of the acting force of the adaptive telescopic element 30 on the protrusion 111 in the first direction X is equal to zero. In the process of switching the first state and the second state of the connection device 100, the component force of the acting force of the adaptive telescopic element 30 on the protrusion 111 in the first direction X gradually decreases from the first state to the intermediate state through the intermediate state, and the component force of the acting force of the adaptive telescopic element 30 on the protrusion 111 in the first direction X gradually increases from the intermediate state to the second state.
Through the arrangement, in the process of switching the states of the connecting device 100, acting force does not need to be applied all the time, and external force can be cancelled only after the direction of the acting force of the adaptive telescopic element 30 on the protruding part 111 is changed in the direction of the component force in the first direction X, so that the protruding part 111 can automatically reach the self-locking position under the action of the adaptive telescopic element 30, and the maintenance and the replacement of the panel 200 connected with the protruding part are easier.
For example, as shown in fig. 6, when the connection device 100 is used to connect the panel 200 and the mounting frame 300 and switch the connection device 100 from the first state to the second state, the panel 200 may be manually pushed to move the panel 200 toward the mounting frame 300, when passing through the intermediate state, the manual pushing force may be removed, the first connecting member 10 and the second connecting member 20 may continue to move relatively by using the telescopic action of the adaptive telescopic element 30, the panel 200 continues to move toward the mounting frame 300 until the connection device 100 reaches the second state, the panel 200 is locked, and the panels 200 are in the same plane, thereby ensuring the display effect.
When the panel 200 is damaged, the damaged panel 200 can be adsorbed by a device with an adsorption function, so that the connection device 100 corresponding to the panel 200 is switched from the second state to the first state, similarly, when the panel passes through the intermediate state, the adsorption force can be removed, the first connection member 10 and the second connection member 20 can continue to move relatively by utilizing the expansion and contraction function of the adaptive expansion and contraction member 30, the panel 200 continuously moves in the direction away from the installation frame 300 until the connection device 100 reaches the first state, the panel 200 is locked, and the panel 200 to be repaired or replaced protrudes out of other panels 200, so that the panel 200 is easy to repair and replace.
Referring to fig. 3 to fig. 6, as an alternative embodiment, in the connection device 100 provided in the above embodiments, the adaptive telescopic element 30 includes a supporting element 31 and an elastic element 32 connected to each other, an end of the supporting element 31 away from the elastic element 32 is a fixed end 30a, an end of the supporting element 31 close to the elastic element 32 is located in an area between a first self-locking position 30c and a second self-locking position 30d and is rotatably connected to the elastic element 32, and an end of the elastic element 32 away from the supporting element 31 is a sliding end 30 b. By adopting the above structure, the adaptive telescopic element 30 can meet the use requirement of the connection device 100, and meanwhile, the adaptive telescopic element 30 has a simple structure, is low in cost and is easy to form.
In some alternative embodiments, the end of the supporting member 31 close to the elastic member 32 is rotatably connected to the elastic member 32 by a hinge shaft 33, and a distance L1 projected to the first position-limiting portion 100a on the second connecting member 20 in a direction perpendicular to the first direction X is the same as a distance L2 of the second position-limiting portion 100 b. Through the arrangement, the connection device 100 can be more favorably switched between the first state and the second state, meanwhile, the distances from the projection of the hinge shaft 33 on the second connecting piece 20 in the direction perpendicular to the first direction X to the first limiting portion 100a and the second limiting portion 100b are limited to be the same, when the connection device 100 is switched between the first state and the second state, the expansion and contraction amounts of the self-adaptive expansion element 30 in the first state and the second state are consistent, the stability of the connection device 100 in the first state and the second state is ensured, the relative movement of the first connecting piece 10 and the second connecting piece 20 in the two states is avoided, and the requirement that the relative positions of the panel 200 and the mounting frame 300 connected with the connection device are stable is further ensured.
As an alternative embodiment, in the first direction X, the ratio of the extension dimension of the supporting member 31 to the extension dimension of the guiding groove 21 is any value between 0.25 and 0.75, including both 0.25 and 0.75, and the ratio of the extension dimension of the supporting member 31 to the extension dimension of the guiding groove 21 is further optionally 0.4 to 0.6, preferably 0.5. Through the arrangement, the position requirement of the hinge shaft 33 connecting the elastic member 32 and the supporting member 31 can be better satisfied, and the state switching requirement and the position locking requirement in the first state and the second state of the connecting device 100 are further ensured.
Alternatively, the above embodiments provide the connecting device 100, wherein the supporting member 31 may be a rod extending along the first direction X, and the supporting member 31 may be provided with a hinge hole to facilitate the rotational connection with the elastic member 32 through the hinge shaft 33.
In some alternative embodiments, the above embodiments provide the connecting device 100, in the first self-locking position 30c, the supporting member 31 and the elastic member 32 form a first included angle γ, and the first included angle γ is an obtuse angle. In the second self-locking position 30d, a second included angle σ is formed between the supporting member 31 and the elastic member 32, and the second included angle σ is an acute angle. Through the arrangement, the structural design of the adaptive telescopic element 30 is facilitated, and the switching of the connecting device 100 between the first state and the second state can be better ensured.
In some alternative embodiments, the angle value of the first included angle γ is any value between 120 ° and 150 °, including both end values of 120 ° and 150 °. The angle value of the second included angle is any value between 30 degrees and 60 degrees, including two end values of 30 degrees and 60 degrees, and the first included angle γ and the second included angle σ are limited to adopt the above numerical value range, so that on the basis of meeting the switching requirement of the connecting device 100 in the first state and the second state, the external force required to be applied in the mutual switching process of the connecting device 100 in the first state and the second state can be further reduced, and the panel 200 applied by the connecting device is easy to install, maintain and replace.
In some alternative embodiments, the angle value of the first included angle γ is further selected to be 130 ° to 140 °, further selected to be 135 °, and the angle value of the second included angle σ is further selected to be 40 ° to 50 °, preferably 45 °, so that the performance of the connection device 100 can be better optimized by limiting the above-mentioned value ranges of the first included angle γ and the second included angle σ.
Referring to fig. 7, as an alternative embodiment, in the connecting device 100 provided in the above embodiments, the guiding section 11 and the mounting section 12 of the first connecting member 10 may have a rod-shaped structure with a predetermined length, and may be a circular column-shaped rod, or may be a polygonal column-shaped rod. Optionally, in order to make the connection device 100 provide a limit in the first direction X when connecting the panel 200 and the mounting frame 300, and avoid the relative movement between the panel assembly formed by the panel 200 and the connection device 100 and the mounting frame 300 when the connection device 100 is in the first state, the guide segments 11 and the mounting segments 12 are optionally arranged to intersect.
In order to facilitate the assembly between the first connector 10 and the second connector 20, as an alternative embodiment, the guiding section 11 includes a cylindrical plug body 112 and a fixing sleeve 113 sleeved on the plug body 112 and detachably connected to the plug body 112, and the protrusion 111 is disposed on the fixing sleeve 113. Through the arrangement, the protruding part 111 and the plug-in body 112 can be separately processed and manufactured, and the protruding part and the plug-in body can be flexibly disassembled and assembled when being matched with the second connecting piece 20, so that the processing and assembling difficulty is reduced.
In some optional examples, the included angle between the guide section 11 and the mounting section 12 is any value between 75 ° and 105 °, including two end values of 75 ° and 105 °, and by the above arrangement, the limiting requirement of the connecting device 100 can be met, and the dismounting requirement between the panel assembly and the mounting frame 300 is facilitated.
Referring to fig. 8, as an alternative embodiment, the connecting device 100 according to the above embodiments has a sleeve-shaped second connecting member 20, and the shape of the second connecting member 20 matches the shape of the first connecting member 10, and the cross section of the second connecting member 20 may be circular, or may be polygonal. Optionally, in the first direction X, the guide groove 21 penetrates through the end surface of the second connector 20 far away from the mounting section 12, so that the fixing sleeve 113 provided with the protrusion 111 can enter the inside of the second connector 20 along the first direction X, and the protrusion 111 enters the inside of the guide groove 21 from the penetrated end surface of the guide groove 21, thereby facilitating the assembly between the first connector 10 and the second connector 20.
Optionally, when the guiding groove 21 penetrates through the end surface of the second connecting element 20 away from the mounting section 12, the end of the wall portion enclosing the guiding groove 21 close to the mounting section 12 is a first limiting portion 100a, and the object to be connected (the panel 200 or the mounting frame 300) is a second limiting portion 100b, so as to meet the requirement of switching the connecting device 100 between the first state and the second state.
As an alternative embodiment, referring to fig. 2 to 8, the first connecting member 10 includes at least two protrusions 111, and the distance between any two adjacent protrusions 111 along the outer edge of the guiding section 11 is the same. Accordingly, the number of the guide grooves 21 is not less than the number of the protrusions 111, and each protrusion 111 protrudes from one of the guide grooves 21. Alternatively, the number of the adaptive telescopic elements 30 is not less than the number of the projections 111, and the sliding end 30b of each adaptive telescopic element 30 is connected to one of the projections 111.
By limiting the number of the protruding portions 111 to be at least two, and simultaneously limiting the number of the adaptive telescopic elements 30 to be not less than the number of the protruding portions 111 and the matching relationship with the protruding portions 111, when the connecting device 100 is switched between the first state and the second state, the smoothness of the relative movement of the first connecting piece 10 and the second connecting piece 20 and the limiting requirement of the sliding end 30b in the first self-locking position 30c and the second self-locking position 30d can be ensured, and the performance of the connecting device 100 is optimized.
In a specific implementation, the number of the protruding portion 111 and the number of the adaptive telescopic elements 30 may be two, and the two adaptive telescopic elements 30 are symmetrically arranged with respect to each other. Of course, in some other examples, the number of the protruding portion 111 and the adaptive telescopic element 30 may also be one, or the number of the protruding portion 111 and the adaptive telescopic element 30 may also be more than two, such as three, four, or even more, respectively, and may be specifically set according to the size specification and the application environment of the connection device 100, and the number is not limited herein.
Referring to fig. 9, as an alternative embodiment, in the connection device 100 provided in the above embodiments, the elastic element 32 includes an elastic element 321, and the connection device 100 can be switched between the first state and the second state by using the elastic force of the elastic element 321. Optionally, the elastic element 321 may be one of a spring, a rubber pad and an air bag, and the elastic element 321 is in the above form, so that the structure is simple, the cost is low, and the maintenance and the replacement are easy on the basis of meeting the elastic requirement of the adaptive telescopic element 30.
Referring to fig. 10 and 11 together, as an alternative embodiment, in the connection device 100 provided in the above embodiments, the elastic element 32 further includes a bending-resistant element 322, the elastic element 32 is connected to at least one of the supporting element 31 and the protruding portion 111 through the bending-resistant element 322, the bending-resistant element 322 includes a sleeve 322a and a rod 322b slidably connected to the sleeve 322a, one end of the elastic element 321 is connected to the sleeve 322a, and the other end is connected to the rod 322 b. By arranging the bending-resistant part 322, the elastic element 321 can be supported, so that the elastic element 321 cannot be bent and deformed randomly in space, and the supporting force provided by the elastic part can meet the requirement.
In practical applications, the elastic element 321 may be sleeved on the outer periphery of the anti-bending element 322, and in some other examples, the elastic element 321 may also be disposed inside the sleeve 322a, and both requirements for providing support to the elastic element 321 may be met.
Referring to fig. 12 to 14, it is understood that the structure of the elastic element 32 provided in the above embodiments is only an alternative embodiment, but not limited to the above form, in some other examples, the elastic element 32 may also adopt a structure form including a plurality of connecting rods 323 and an elastic element 321, the plurality of connecting rods 323 are sequentially and rotatably connected, the expansion direction of the elastic element 321 intersects the first direction X, and two ends of the elastic element 321 in the expansion direction are respectively connected with the connecting rods 323. The plurality of connecting rods 323 includes a first group 323a and a second group 323b, and in the first self-locking position 30c, the connecting rods 323 of the first group 323a are located on a side of the elastic element 321 near the object to be connected in the first direction X, and the connecting rods 323 of the second group 323b are located on a side of the elastic element 321 near the mounting section 12 in the first direction X. In the second self-locking position 30d, the connecting rods 323 of the first group 323a are located on the side of the elastic element 321 that is close to the mounting section 12 in the first direction X, and the connecting rods 323 of the second group 323b are located on the side of the elastic element 321 that is close to the object to be connected in the first direction X. The elastic member 32 with the above structure can also satisfy the switching requirement of the connection device 100 between the first state and the second state, and meanwhile, has higher stability, and can ensure the stability of the tiled display device during the display operation and the maintenance and replacement requirements of the single panel 200.
As shown in fig. 14, in this example, the connection device 100 passes through the intermediate state in the process of switching between the first state and the second state, and when the connection device 100 is in the intermediate state, the extending and contracting direction of the elastic member 321 coincides with the extending direction of each of the connection bars 323, and both directions are perpendicular to the first direction X.
As an alternative embodiment, the number of the connecting rods 323 may be four, the end portions of two adjacent connecting rods 323 are hinged to each other through the rotating shaft 324, and one end of the elastic element 321 in the telescopic direction is connected to one of the rotating shafts 324 and the other end is connected to another non-adjacent rotating shaft 324. The connecting rods 323 adopt the number and the matching mode with the elastic element 321, can better meet the performance requirement of the self-adaptive telescopic element 30, and have the advantages of simplified structure and high stability.
Please refer to fig. 15, it is understood that the limitation of the number of the connecting rods 323 to four is only an optional embodiment, and the number of the connecting rods 323 may be more than four, for example, six or eight, so that the plurality of connecting rods 323 are integrally formed as an X-shaped rod-shaped combined mechanism, which can also meet the performance requirement of the connecting device 100, and thus, the description thereof is omitted.
Referring to fig. 16 and 17, it can be understood that, in the connecting device 100 according to the above embodiment, when the extending length of the supporting member 31 in the first direction X is short, in the second self-locking position 30d, the connecting rods 323 of the first group 323a and the connecting rods 323 of the second group 323b are located on the side of the elastic element 321 close to the object to be connected in the first direction X. The stability requirement of the connecting device 100 in the second state can be met, and the display requirement of the tiled display device can be further met.
Referring to fig. 18, the connection device 100 provided in each of the above embodiments is described by taking an example that the guide groove 21 penetrates through the end surface of the second connection member 20 away from the mounting section 12 in the first direction X, it can be understood that this is only an alternative embodiment, and in some other examples, in the first direction X, the guide groove 21 may also be a closed groove, and one end of a wall portion enclosing the guide groove 21 in the first direction X is the first position-limiting portion 100a and the other end is the second position-limiting portion 100 b. The functional requirements that the connecting device 100 in the first state forms a force balance between the adaptive telescopic element 30, the object to be connected and the first limiting portion 100a, so that the sliding end 30b is limited at the first self-locking position 30c, and in the second state forms a force balance between the adaptive telescopic element 30, the object to be connected and the second limiting portion 100b, so that the sliding end 30b is limited at the second self-locking position 30d can be met.
As an alternative, referring to fig. 2 to 18, the connecting device 100 according to the above embodiments may be connected to the mounting frame 300 through the first connecting member 10, and connected to the panel 200 through the second connecting member 20. Of course, in order to facilitate the disassembly and assembly of the panel 200 itself or the disassembly and assembly of the panel assembly formed by the panel 200 and the connection device 100 when the panel 200 is damaged, optionally, the connection device 100 further includes a third connection member 40, the third connection member 40 is detachably connected to the installation section 12, wherein one of the installation section 12 and the third connection member 40 is a plug bush and the other is a plug rod. By arranging the third connecting member 40 and limiting the matching mode of the third connecting member with the mounting section 12, the connecting device 100 can be connected with the mounting frame 300 through the third connecting member 40, when one or more panels 200 of the tiled display device are broken down and need to be repaired or replaced, the connecting device 100 can be switched from the second state to the first state, the third connecting member 40 is separated from the mounting section 12, the panel 200 or the panel assembly formed by the panel 200 and the connecting device 100 is integrally disassembled and assembled, the panel assembly is separated from the mounting frame 300, and the maintenance or replacement of the panel 200 is realized.
In some alternative embodiments, the plug bush includes a bush body 41 and a guide portion 42, the guide portion 42 is in a semi-open trumpet shape and is connected to an end of the bush body 41, and a cross-sectional size of the guide portion 42 is gradually increased along a direction in which the bush body 41 is directed to the guide portion 42. The plug bush adopts the structure, so that the plug bush and the plug rod can provide guidance through the guide part 42 when being matched, the disassembly and the assembly between the plug bush and the plug rod are convenient, and the disassembly and the assembly requirements of the panel 200 are better met.
Referring to fig. 19, it is understood that the connection limiting device 100 is connected to the mounting frame 300 through the third connecting member 40, and is connected to the panel 200 through the second connecting member 20, which is an alternative embodiment, and in some other embodiments, as shown in fig. 19, the connection limiting device may also be connected to the panel 200 through the third connecting member 40, and connected to the mounting frame 300 through the second connecting member 20, so as to meet the requirement of assembling and disassembling the panel 200 and the mounting frame 300.
Therefore, the connection device 100 provided by the embodiment of the invention can be used for connecting the panel 200 and the installation frame 300, and in the second state, the self-adaptive telescopic element 30, the object to be connected and the second limiting portion 100b form force balance, so that the sliding end 30b is limited at the second self-locking position 30d, the relative movement of the first connection piece 10 and the second connection piece 20 is avoided, and the panels 200 are flush, and the display requirement is ensured. When one of the panels 200 needs to be replaced or maintained, the panel 200 is absorbed by external force, so that the connecting device 100 is switched from the second state to the first state, and because in the first state, force balance is formed among the adaptive telescopic element 30, the object to be connected and the second limiting part 100b, so that the sliding end 30b is limited at the second self-locking position 30d, and further the panel 200 is kept protruding out of other panels 200, so that the panel 200 is easy to replace or maintain.
That is, the connecting device 100 provides an acting force through the adaptive telescopic element 30 regardless of the first state or the second state, and forms a force balance with the object to be connected and the corresponding first limiting portion 100a or the second limiting portion 100b, so as to meet the display requirement and the dismounting or maintenance requirement of the panel 200, and no additional locking component is required to be added in both states, thereby reducing the number of components included in the connecting device 100, and further simplifying the overall structure of the connecting device 100 and reducing the cost.
The panel assembly according to the embodiment of the present invention, including the connection device 100 according to the above embodiments, has the advantages of simple overall structure, low cost, easy assembly and disassembly with the mounting frame 300, and the like.
The splicing display device provided by the embodiment of the invention comprises the panel components provided by the embodiments, so that when the connecting device 100 of each panel component is in the second state, each panel 200 can be flush with each other, the display requirement is ensured, when one or part of the panels 200 needs to be maintained or replaced, the connecting device 100 corresponding to the panel 200 is in the first state through the adsorption device and the like, the damaged panel 200 pops out and protrudes out of other panels 200, the panel 200 can be maintained or disassembled and replaced, the stable requirement in the display process can be ensured, the maintenance is convenient, the whole structure is simple, the cost is low, and the splicing display device is easy to popularize and use.
While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (19)
1. A connection device, comprising:
a first connecting member having a guide section and a mounting section arranged in succession, the guide section having a projection on an outer edge thereof;
the second connecting piece is sleeved on the guide section and is in sliding connection with the guide section, a guide groove is formed in the outer edge of the second connecting piece, the protruding part extends into the guide groove and is arranged in the guide groove in a sliding mode, and one end, far away from the installation section, of the second connecting piece is connected to an object to be connected;
the connecting device or the whole body formed by connecting the connecting device and the object to be connected is provided with a first limiting part and a second limiting part which are oppositely arranged in a first direction, and the first direction is the extending direction of the guide groove;
the self-adaptive telescopic element is provided with a fixed end and a sliding end, the sliding end is connected to the protruding part, the fixed end is used for being connected to the object to be connected, the sliding end is provided with a first self-locking position and a second self-locking position which are sequentially arranged along the first direction in the guide groove, the distance between the first self-locking position and the second self-locking position is larger than zero, wherein,
the operative state of the connection device comprises a first state and a second state,
in the first state, force balance is formed among the self-adaptive telescopic element, the object to be connected and the first limiting part, so that the sliding end is limited at the first self-locking position;
and in the second state, force balance is formed among the self-adaptive telescopic element, the object to be connected and the second limiting part, so that the sliding end is limited at the second self-locking position.
2. The connection device of claim 1,
in the first state, the component force of the acting force of the self-adaptive telescopic element on the convex part in the first direction is greater than zero;
in the second state, the component force of the acting force of the self-adaptive telescopic element on the convex part in the first direction is greater than zero;
and the component force direction of the acting force of the self-adaptive telescopic element on the protruding part in the first direction in the first state is opposite to the component force direction of the acting force of the self-adaptive telescopic element on the protruding part in the first direction in the second state.
3. A connection device according to claim 1, characterised in that the connection device further comprises an intermediate state in which the component of the force of the adaptive telescopic element on the projection in the first direction is equal to zero, the connection device passing through the intermediate state during the mutual switching between the first state and the second state;
from the first state to the intermediate state, the component force of the acting force of the adaptive telescopic element on the protruding portion in the first direction is gradually reduced, and from the intermediate state to the second state, the component force of the acting force of the adaptive telescopic element on the protruding portion in the first direction is gradually increased.
4. The connecting device according to any one of claims 1 to 3, wherein the adaptive telescopic element comprises a supporting member and an elastic member, the supporting member is connected to the elastic member, the end of the supporting member away from the elastic member is the fixed end, the end of the supporting member close to the elastic member is located in the area between the first self-locking position and the second self-locking position and is rotatably connected to the elastic member, and the end of the elastic member away from the supporting member is the sliding end.
5. The connecting device according to claim 4, wherein the end of the supporting member near the elastic member is rotatably connected to the elastic member by a hinge shaft, and the distance of the hinge shaft projected to the first stopper portion and the second stopper portion in the direction perpendicular to the first direction on the second connecting member is the same.
6. The connecting device according to claim 4, wherein in the first self-locking position, a first included angle is formed between the supporting member and the elastic member, and the first included angle is an obtuse angle; and in the second self-locking position, a second included angle is formed between the supporting piece and the elastic piece, and the second included angle is an acute angle.
7. The connection device of claim 6, wherein the resilient member comprises a resilient element, the resilient element being one of a spring, a rubber pad, and an air bladder.
8. The connecting device of claim 7, wherein the resilient member further comprises a flexure resistant member, the resilient member being connected to at least one of the support member and the protrusion by the flexure resistant member, the flexure resistant member comprising a sleeve and a rod slidably connected to the sleeve, the resilient member having one end connected to the sleeve and another end connected to the rod.
9. The connecting device according to claim 8, wherein the elastic member is fitted around an outer periphery of the bending resistant member; alternatively, the resilient element is located inside the sleeve.
10. The connection device of claim 4,
the elastic part comprises a plurality of connecting rods and an elastic element, the connecting rods are sequentially connected in a rotating mode, the stretching direction of the elastic element is intersected with the first direction, and two ends of the elastic element in the stretching direction are respectively connected with the connecting rods;
the connecting rods comprise a first group and a second group, in the first self-locking position, the connecting rods of the first group are positioned on one side, close to the object to be connected, of the elastic element in the first direction, and the connecting rods of the second group are positioned on one side, close to the mounting section, of the elastic element in the first direction;
in the second self-locking position, the connecting rods of the first group are positioned on one side of the elastic element close to the mounting section in the first direction, and the connecting rods of the second group are positioned on one side of the elastic element close to the object to be connected in the first direction; or,
in the second self-locking position, the connecting rods of the first group and the connecting rods of the second group are both positioned on one side of the elastic element close to the object to be connected in the first direction.
11. The connecting device according to claim 10, wherein the number of the connecting rods is four, the ends of two adjacent connecting rods are hinged to each other by a rotating shaft, and one end of the elastic element in the telescopic direction is connected to one of the rotating shafts and the other end is connected to the other non-adjacent rotating shaft.
12. The connecting device according to any one of claims 1 to 3, wherein the connecting device has a first stopper portion and a second stopper portion that are disposed opposite to each other in a first direction in which the guide groove is a closed groove, one end of a wall portion that encloses the guide groove in the first direction being the first stopper portion and the other end being the second stopper portion;
or, the connecting device and the whole body formed by connecting the to-be-connected object are provided with a first limiting part and a second limiting part which are oppositely arranged in a first direction, in the first direction, the guide groove penetrates through the second connecting piece and is far away from the end surface of the installation section, the wall part of the guide groove is formed in a surrounding mode, one end, close to the installation section, of the wall part is the first limiting part, and the to-be-connected object is the second limiting part.
13. The connecting device according to any one of claims 1 to 3, wherein in the first direction, the guiding groove penetrates through an end surface of the second connecting member away from the mounting section, the guiding section includes a cylindrical plug body and a fixing sleeve that is sleeved on the plug body and detachably connected with the plug body, and each of the protruding portions is disposed on the fixing sleeve.
14. The connecting device according to any one of claims 1 to 3, wherein the number of the projections is at least two, and the distance between any two adjacent projections is the same along the outer edge of the guide section;
the number of the guide grooves is not less than that of the convex parts, and each convex part is in sliding fit with one of the guide grooves;
the number of the adaptive telescopic elements is the same as the number of the projections, and the sliding end of each adaptive telescopic element is connected to one of the projections.
15. A connection device according to any one of claims 1 to 3, wherein the guide section and the mounting section intersect, and the angle between the guide section and the mounting section is 75 ° to 105 °.
16. The connecting device according to any one of claims 1 to 3, further comprising a third connecting member detachably connected to the mounting section, wherein one of the mounting section and the third connecting member is a socket sleeve and the other is a socket rod.
17. The connecting device according to claim 16, wherein the plug bush includes a bush body and a guide portion which is in a semi-open trumpet shape and is connected to an end of the bush body, and a cross-sectional size of the guide portion is gradually increased in a direction in which the bush body is directed to the guide portion.
18. A panel assembly, comprising:
a connection device as claimed in any one of claims 1 to 17;
a panel having a backside connected to one of the first connector and the second connector.
19. A tiled display device, comprising:
a mounting frame;
the panel assembly of claim 18, wherein the number of the panel assemblies is plural and the panels of the plurality of the panel assemblies are spliced to each other, each of the panel assemblies is connected to the mounting frame by the other of the first connection member and the second connection member, and the object to be connected is the panel or the mounting frame.
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| CN202010108575.0A CN111276059B (en) | 2020-02-21 | 2020-02-21 | Connecting device, panel assembly and splicing type display equipment |
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| CN202010108575.0A CN111276059B (en) | 2020-02-21 | 2020-02-21 | Connecting device, panel assembly and splicing type display equipment |
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| CN113593425A (en) * | 2021-09-03 | 2021-11-02 | 深圳做真科研有限公司 | Connecting mechanism and splicing handwriting board |
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