CN117895296A - Switching assembly and display device - Google Patents

Abstract

The application relates to a switching assembly and a display device, wherein the switching assembly comprises a switching plate and a plurality of conductive plates, the switching plate is provided with a first side and a second side which are opposite to each other along the thickness direction, the plurality of conductive plates are respectively connected to the first side and the second side of the switching plate, and the plurality of conductive plates are arranged in rows along the first direction and in columns along the second direction; the first direction is perpendicular to the second direction, and the extending direction of each conductive sheet is parallel to the first direction. The method and the device can solve the problem that abnormal display images are caused by poor contact connection in the connection process of the flexible circuit board, the adapter plate and the control chip.

Description

Switching assembly and display device

Technical Field

The application relates to the technical field of display, in particular to a switching assembly and a display device.

Background

The Micro light emitting diode (Micro Light Emitting Diode, micro LED) display module is electrically connected with an external controller such as a control chip through a flexible circuit board (Flexible Printed Circuit, FPC), and an adapter plate is generally adopted between the flexible circuit board and the control chip as a connection medium. However, in the connection process, the connection of the contacts is poor, which easily causes abnormal display.

Disclosure of Invention

Accordingly, it is necessary to provide a switching assembly and a display device for solving the problem that the display screen is abnormal due to poor contact connection in the connection process of the flexible circuit board, the switching board and the control chip.

According to one aspect of the present application, there is provided a transit assembly comprising: an adapter plate having a first side and a second side opposite to each other in a thickness direction; the plurality of conductive sheets are respectively connected to the first side and the second side of the adapter plate, are arranged in rows along a first direction and are arranged in columns along a second direction; the first direction is perpendicular to the second direction, and the extending direction of each conductive sheet is parallel to the first direction.

In some embodiments, the conductive sheet has a connection end and a free end opposite to each other, the connection end being connected to the interposer, the free end extending in a direction away from the interposer.

In some embodiments, a bending part is connected to one end of the free end away from the connecting end; the extending direction of the bending part is parallel to the surface of the adapter plate; or the bending part extends towards the direction approaching to the adapter plate.

In some embodiments, the transition region between the bend and the free end is configured as an arc.

In some embodiments, the width of the connecting end is greater than or equal to the width of the free end.

In some embodiments, the adapter assembly further comprises a securing tab and a fastener; the fixing piece is configured to be in pressure connection with one side of the adapter plate; fixing holes are formed in the corresponding positions of the fixing piece and the adapter plate; the fastener is configured to pass through the fixing piece and the fixing hole on the adapter plate at the same time and compress the space between the fixing piece and the adapter plate.

In some embodiments, the fixing piece is provided with one fixing hole at each of opposite ends along the first direction.

In some embodiments, the fixing piece and the adapter plate are further provided with limiting holes corresponding to each other; the limiting hole is configured for alignment with a hole on a component to which the adapter assembly is connected.

In some embodiments, one of the limiting holes is respectively arranged at two opposite ends of the fixing piece along the first direction, and the shapes of the two limiting holes are different.

According to another aspect of the present application, a display device is provided, including a switching assembly as described above.

The switching subassembly that this application provided, including the keysets and connect a plurality of conducting strips on the keysets, a plurality of conducting strips are arranged in rows, in rows respectively along mutually perpendicular's two directions, and the extending direction and the row direction of every conducting strip are parallel. Based on this, in the process of utilizing the screw to assemble flexible circuit board, keysets and control chip fixed, because the distribution of conducting strip is comparatively even in the left and right sides of row direction, therefore, when keysets and flexible circuit board are connected, no matter flexible circuit board twists reverse to the left side of row direction or twists reverse to the right side of row direction, the metal contact on the flexible circuit board all has great probability and can contact each other with the conducting strip on the keysets, has reduced the risk that both can't contact to the equipment success rate of flexible circuit board, keysets and control chip has been promoted, make the picture can normally show.

Drawings

Fig. 1 is a sectional view showing a press-fit state of a display device at a joint in an embodiment of the present application.

Fig. 2 is a cross-sectional view showing an unfixed state of the display device at the joint in an embodiment of the application.

Fig. 3 shows an expanded view of the junction part of the display device in an embodiment of the present application.

Fig. 4 shows a schematic structural diagram of a conductive sheet of a transfer assembly according to an embodiment of the present application.

Fig. 5 shows a schematic structural diagram of a transfer assembly according to an embodiment of the present application.

Reference numerals illustrate:

1. a switching component; 2. a flexible circuit board; 3. a control chip; 4. a contact;

10. an adapter plate; 11. a first side; 12. a second side;

20. a conductive sheet; 21. a connection end; 22. a free end; 23. a bending part;

30. a fixing piece; 31. a fixing hole; 32. a limiting hole;

40. a fastener;

x, a first direction; y, second direction.

Detailed Description

In order to make the above objects, features and advantages of the present application more comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is, however, susceptible of embodiment in many other forms than those described herein and similar modifications can be made by those skilled in the art without departing from the spirit of the application, and therefore the application is not to be limited to the specific embodiments disclosed below.

In the description of the present application, it should be understood that, if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., these terms refer to the orientation or positional relationship based on the drawings, which are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, if any, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the terms "plurality" and "a plurality" if any, mean at least two, such as two, three, etc., unless specifically defined otherwise.

In this application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly. For example, the two parts can be fixedly connected, detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

In this application, unless expressly stated or limited otherwise, the meaning of a first feature being "on" or "off" a second feature, and the like, is that the first and second features are either in direct contact or in indirect contact through an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that if an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein, if any, are for descriptive purposes only and do not represent a unique embodiment.

The Micro light emitting diode (Micro Light Emitting Diode, micro LED) display module is electrically connected with an external controller such as a control chip through a flexible circuit board (Flexible Printed Circuit, FPC), an adapter plate is generally adopted between the flexible circuit board and the control chip as a connection medium, metal elastic pieces are respectively arranged on two opposite sides of the adapter plate, one side of the metal elastic piece is electrically connected with a metal contact on the flexible circuit board, and the other side of the metal elastic piece is electrically connected with a metal contact on the control chip, so that the display module is conducted with the controller.

Illustratively, the display module includes a stainless steel plate, a silicon back plate disposed on the stainless steel plate, which serves as a support, and a flexible circuit board disposed on the silicon back plate, which is used for disposing electronic devices such as electrodes, chips, capacitors, etc. In the process of electrically connecting the display module with the control chip by using the flexible circuit board, the adapter plate and the control chip are required to be sequentially stacked, and then the flexible circuit board, the adapter plate and the control chip are assembled and fixed together by using a plurality of screws, so that metal elastic sheets on two opposite sides of the adapter plate are respectively contacted with metal contacts on the flexible circuit board and metal contacts on the control chip.

However, the inventor of the present application found that the flexible circuit board is easy to deform in the research process, and the size of the metal contact on the flexible circuit board is smaller, so that the flexible circuit board is easy to deform in torsion due to inconsistent tightening progress of a plurality of screws, and misalignment is easy to occur between the metal contact on the flexible circuit board and the metal elastic sheet on the adapter plate, so that poor contact or no contact is caused, and abnormal display picture is caused. For example, when four screws in a rectangular arrangement are required to be simultaneously used for fixation, it is desirable that the four screws are rotated in a quarter turn process each time until locked. If the rotation progress of a certain screw is faster, the installation failure is easily caused. In the actual operation process, it is often difficult to ensure that the progress of each rotation is kept consistent, so that the risk of installation failure is high.

The inventor of the present application further studied and found that the reason why the metal contact is difficult to contact with the metal spring sheet after the metal contact is slightly dislocated is mainly due to the structural characteristics of the current adapter plate. Specifically, a plurality of metal spring plates are generally arranged along the length direction of the adapter plate on the current adapter plate, and each metal spring plate extends at an included angle of 45 degrees relative to the length direction of the adapter plate. For example, when the metal spring plate extends obliquely by 45 ° relative to the left side of the reference direction with the length direction of the adapter plate as the reference direction, a blank area with an included angle of at least 45 ° exists on the right side of the metal spring plate. At this time, if the flexible circuit board is twisted rightward relative to the reference direction, there is a great risk that the metal contact on the flexible circuit board cannot be contacted with the metal spring sheet on the adapter board.

In order to solve the above problems, the application provides a transfer assembly, which comprises a transfer plate and a plurality of conductive sheets connected to the transfer plate, wherein the conductive sheets are respectively arranged in rows and columns along two directions perpendicular to each other, and the extending direction of each conductive sheet is parallel to the row direction. Based on this, in the process of utilizing the screw to assemble flexible circuit board, keysets and control chip fixed, because the distribution of conducting strip is comparatively even in the left and right sides of row direction, therefore, when keysets and flexible circuit board are connected, no matter flexible circuit board twists reverse to the left side of row direction or twists reverse to the right side of row direction, the metal contact on the flexible circuit board all has great probability and can contact each other with the conducting strip on the keysets, has reduced the risk that both can't contact to the equipment success rate of flexible circuit board, keysets and control chip has been promoted, make the picture can normally show.

Fig. 1 is a sectional view showing a press-fit state of a display device at a joint in an embodiment of the present application. Fig. 2 is a cross-sectional view showing an unfixed state of the display device at the joint in an embodiment of the application. Fig. 3 shows an expanded view of the junction part of the display device in an embodiment of the present application.

Referring to fig. 1-3, an adapter assembly 1 according to an embodiment of the present application includes an adapter plate 10 and a plurality of conductive plates 20. The shape of the adapter plate 10 may be square, rectangular, etc. The interposer 10 has a first side 11 and a second side 12 opposite to each other in a thickness direction, a plurality of conductive sheets 20 are respectively connected to the first side 11 and the second side 12 of the interposer 10, and the plurality of conductive sheets 20 are arranged in rows along a first direction X and in columns along a second direction Y. The first direction X is perpendicular to the second direction Y, and the extending direction of each conductive sheet 20 is parallel to the first direction X. For example, the shape of the interposer 10 is rectangular, the long side of the interposer 10 is parallel to the first direction X, and the short side of the interposer 10 is parallel to the second direction Y. In this way, in the process of assembling and fixing the flexible circuit board 2, the adapter board 10 and the control chip 3 by using the screws, since the distribution of the conductive sheets 20 on the left and right sides in the row direction is relatively uniform, when the adapter board 10 is connected with the flexible circuit board 2, no matter the flexible circuit board 2 is twisted to the left side in the row direction or twisted to the right side in the row direction, the contacts 4 on the flexible circuit board 2 and the conductive sheets 20 on the adapter board 10 can be contacted with each other with a relatively high probability, so that the risk that the contacts cannot be contacted with each other is reduced, and the success rate of assembling the flexible circuit board 2, the adapter board 10 and the control chip 3 is improved, and the picture can be displayed normally.

Optionally, the plurality of conductive sheets 20 are arranged in rows along the first direction X and in columns along the second direction Y, wherein the number of rows and columns are equal or unequal.

In an exemplary embodiment, the number of rows and columns is equal. For example, the number of rows and columns are three, i.e., the number of conductive sheets 20 in a row is three, and the number of conductive sheets 20 in a column is also three.

In another exemplary embodiment, the number of rows and the number of columns are not equal, i.e., the number of rows is less than the number of columns or the number of rows is greater than the number of columns. Taking the example of the number of rows being less than the number of columns, the number of columns is three, the number of columns is four, five, six, seven, eight or more, i.e., the number of conductive sheets 20 in one row is four, five, six, seven, eight or more, and the number of conductive sheets 20 in one column is also three.

Alternatively, the conductive pads 20 on the first side 11 and the second side 12, respectively, are oppositely oriented. In this way, when the interposer 10 is in press-fit with other components, such as the flexible circuit board 2 and the control chip 3, the stress directions of the conductive sheets 20 located on two opposite sides of the interposer 10 are opposite, so that the stress of the interposer 10 is more balanced, and the risk of the interposer 10 moving in the press-fit fixing process is reduced.

Alternatively, the conductive sheet 20 may be a spring sheet. In this way, in the process of crimping the flexible circuit board 2, the adapter board 10 and the control chip 3, the elastic sheet can elastically deform under the crimping force, so that the conductive sheet 20 is in close contact with the contact 4 on the flexible circuit board 2 or the control chip 3, and the flexible circuit board 2, the adapter board 10 and the control chip 3 are electrically connected.

Fig. 4 shows a schematic structural diagram of a conductive sheet of a transfer assembly according to an embodiment of the present application.

Referring to fig. 2, 3 and 4, in some embodiments, the conductive sheet 20 has a connection end 21 and a free end 22 opposite to each other, the connection end 21 being connected to the interposer 10, and the free end 22 extending in a direction away from the interposer 10. In this way, when the flexible circuit board 2, the adapter board 10 and the control chip 3 are assembled and fixed, the free end 22 of the conductive sheet 20 is firstly contacted with the contact 4 on the flexible circuit board 2 or the control chip 3, and then is elastically deformed under the action of pressure and is tightly contacted with the contact 4 on the flexible circuit board 2 or the control chip 3, so that the stable electric connection effect is ensured.

Optionally, an included angle between an extending direction of the conductive sheet 20 away from the interposer 10 and an extending direction of the interposer 10 is 30 ° to 45 °. For example, the angle between the extending direction of the conductive sheet 20 away from the interposer 10 and the extending direction of the interposer 10 is 31 °, 35 °, 40 °. On the one hand, the conductive sheet 20 extends a certain distance away from the interposer 10, so that the conductive sheet 20 is easier to contact with the flexible circuit board 2 or the contact 4 on the control chip 3; on the other hand, the included angle between the connection part of the conductive sheet 20 and the adapter plate 10 is not too large, so that the risk of fracture of the connection part under the action of pressure can be reduced.

In an alternative embodiment, the conductive sheet 20 has a connection end 21 and a free end 22 opposite to each other, the connection end 21 is connected to the interposer 10, the free end 22 extends in a direction away from the interposer 10, and an end of the free end 22 facing away from the connection end 21 is connected to a bending portion 23, and an extending direction of the bending portion 23 is parallel to a surface of the interposer 10. In this way, during the pressing stage, the free end 22 of the conductive sheet 20 can move smoothly away from the connecting end 21 under the action of pressure.

In another alternative embodiment, the conductive sheet 20 has a connection end 21 and a free end 22 opposite to each other, the connection end 21 is connected with the interposer 10, the free end 22 extends in a direction away from the interposer 10, and an end of the free end 22 facing away from the connection end 21 is connected with a bending portion 23, and the bending portion 23 extends in a direction approaching the interposer 10. In this way, during the pressing stage, the free end 22 of the conductive sheet 20 can move smoothly away from the connecting end 21 under the action of pressure.

Further, the cross-sectional shape of the bent portion 23 may be a straight line, a curved line, refraction, or a combination thereof. Thus, the shape of the conductive sheet 20 is more flexible, and the difficulty of the manufacturing process is reduced.

Alternatively, the transition region between the bent portion 23 and the free end 22 of the conductive sheet 20 is configured in an arc shape. The transition region between the fold 23 and the free end 22 is embodied in the form of a circular arc, for example. Based on this, in the pressing process, the portion of the conductive sheet 20 that contacts the flexible circuit board 2 or the contact 4 on the control chip 3 is a smooth arc surface, so that the free end 22 of the conductive sheet 20 can smoothly move away from the connection end 21 under the action of pressure.

Optionally, the width of the connecting end 21 is greater than or equal to the width of the free end 22. Illustratively, the width of the connecting end 21 is greater than the width of the free end 22. In other words, the width of the free end 22 is smaller, so that the free end 22 generates less resistance in the initial contact stage and is easier to deform, thereby making the pressing process smoother. Meanwhile, the width of the connecting end 21 is larger, so that on one hand, the connecting end 21 has higher structural strength and is not easy to break in the pressing process; on the other hand, the wider connection ends 21 provide a larger contact area during later flattening, reducing the risk of poor connection and reducing the resistance of the contact 4.

Fig. 5 shows a schematic structural diagram of a transfer assembly according to an embodiment of the present application.

Referring to fig. 1, 3 and 5, in some embodiments, the adapter assembly 1 further includes a securing tab 30 and a fastener 40, wherein the fastener 40 may be a screw in particular. The fixing piece 30 is configured to be press-fitted to one side of the adapter plate 10. The fixing plate 30 and the adapter plate 10 are respectively provided with a fixing hole 31 at the corresponding position, and when the fastening piece 40 is a screw, the fixing holes 31 are corresponding threaded holes. The fastener 40 is configured to pass through the fixing hole 31 of the fixing plate 30 and the adapter plate 10 at the same time and to compress the fixing plate 30 and the adapter plate 10.

It will be appreciated that the surface of the stator 30 is planar and has a certain rigidity, for example, the stator 30 may be an iron sheet. Based on this, the fixing piece 30 can provide more uniform pressure to various parts of the adapter plate 10 and protect the adapter plate 10.

Alternatively, the fixing pieces 30 are provided with one fixing hole 31 at each of opposite ends in the first direction X. For example, two opposite ends of the fixing piece 30 along the first direction X are respectively provided with a threaded hole as the fixing hole 31, so that only one screw at each end of the fixing piece 30 needs to be screwed down to push the short sides of the fixing piece 30 all downwards, thereby avoiding the problem that materials which are easily caused by different screwing processes when more than two screws need to be screwed down at the same end are twisted, and improving the success rate of switching.

Optionally, the fixing piece 30 and the adapter plate 10 are further provided with corresponding limiting holes 32, and the limiting holes 32 are configured to align with holes on a component to which the adapter assembly 1 is connected. It will be appreciated that when the adapter assembly 1 is connected to the flexible circuit board 2, corresponding holes may also be provided in the flexible circuit board 2 and may be positioned by means of the positioning pins during alignment. Based on this, the relative positional relationship between the adapter plate 10 and the flexible circuit board 2 and the control chip 3 can be adjusted before the lamination process, so that the conductive sheet 20 on the adapter plate 10 can be aligned to the contacts 4 on the flexible circuit board 2 and the control chip 3 more accurately, thereby improving the success rate of the transfer.

Alternatively, one limiting hole 32 is respectively disposed at two opposite ends of the fixing piece 30 along the first direction X, and the shapes of the two limiting holes 32 are different. Illustratively, one of the limiting apertures 32 is circular in shape and the other limiting aperture 32 is elliptical in shape, or the two limiting apertures 32 may each be one of triangular, circular, elliptical, quadrilateral, pentagonal, hexagonal in shape. Based on this, the direction of the fixing piece 30 can be recognized through the holes of different shapes in the corresponding process, thereby avoiding the reverse of the mounting of the flexible circuit board 2.

Alternatively, the shape of the fixing piece 30 is the same as the shape of the interposer 10, and the front projection of the fixing piece 30 on the interposer 10 completely covers the front projection of the conductive sheet 20 on the interposer 10. In this way, the fixing piece 30 can press all the conductive pieces 20.

Further, the size of the fixing piece 30 may be set to be equal to the size of the interposer 10 in consideration of the problem of high interference of other components on the surrounding circuit board.

Optionally, the top corners of the anchor sheet 30 are rounded to avoid sharp corners from scratching the operator or damaging surrounding parts during operation.

Optionally, the adaptor assembly 1 includes two adaptor plates 10 juxtaposed along the second direction Y, each adaptor plate 10 is correspondingly provided with a fixing piece 30, and two opposite ends of each fixing piece 30 along the first direction X are respectively provided with a fixing hole 31. Based on this, only one screw is needed to be screwed at each of the two ends of the fixing piece 30, so that the short sides of the fixing piece 30 can be fully pushed downwards, the problem that materials are twisted due to different screw screwing processes which are easy to occur when more than two screws are needed to be screwed at the same end can be avoided, and the switching success rate is improved.

Based on the same object, the present application further provides a display device, which includes the adapter assembly 1 of the above embodiment.

Referring to fig. 1, 3 and 5, optionally, the display device further includes a display panel, a flexible circuit board 2 and a control chip 3, the flexible circuit board 2 is electrically connected between the display panel and the control chip 3, and the flexible circuit board 2 is connected with the control chip 3 through a switching component 1. The display panel may specifically be a Micro light emitting diode (Micro Light Emitting Diode, micro LED) display panel.

Based on this, in the process of assembling and fixing the flexible circuit board 2, the adapter board 10 and the control chip 3 by using the screws, the conductive sheets 20 on the adapter board 10 are distributed uniformly on the left side and the right side in the row direction, so when the adapter board 10 is connected with the flexible circuit board 2, no matter the flexible circuit board 2 is twisted to the left side in the row direction or twisted to the right side in the row direction, the contacts 4 on the flexible circuit board 2 and the conductive sheets 20 on the adapter board 10 can be contacted with each other with a larger probability, and the risk that the contacts cannot be contacted with each other is reduced, so that the assembling success rate of the flexible circuit board 2, the adapter board 10 and the control chip 3 is improved, and the picture can be displayed normally.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the claims. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.

Claims (10)

1. A transfer assembly, comprising:

an adapter plate having a first side and a second side opposite to each other in a thickness direction; and

the plurality of conductive sheets are respectively connected to the first side and the second side of the adapter plate, are arranged in rows along a first direction and are arranged in columns along a second direction;

the first direction is perpendicular to the second direction, and the extending direction of each conductive sheet is parallel to the first direction.

2. The adapter assembly of claim 1, wherein the conductive sheet has a connecting end and a free end opposite each other, the connecting end being connected to the adapter plate, the free end extending in a direction away from the adapter plate.

3. The adapter assembly according to claim 2, wherein a bending portion is connected to an end of the free end facing away from the connection end;

the extending direction of the bending part is parallel to the surface of the adapter plate; or the bending part extends towards the direction approaching to the adapter plate.

4. The adapter assembly of claim 3 wherein a transition region between the bend and the free end is configured as an arc.

5. The adapter assembly of claim 2, wherein the width of the connecting end is greater than or equal to the width of the free end.

6. The adapter assembly of any one of claims 1-5, wherein the adapter assembly further comprises a securing tab and a fastener;

the fixing piece is configured to be in pressure connection with one side of the adapter plate;

fixing holes are formed in the corresponding positions of the fixing piece and the adapter plate;

the fastener is configured to pass through the fixing piece and the fixing hole on the adapter plate at the same time and compress the space between the fixing piece and the adapter plate.

7. The adapter assembly according to claim 6, wherein the fixing piece is provided with one fixing hole at each of opposite ends along the first direction.

8. The adapter assembly according to claim 6, wherein the fixing piece and the adapter plate are further provided with limiting holes corresponding to each other;

the limiting hole is configured for alignment with a hole on a component to which the adapter assembly is connected.

9. The adapter assembly according to claim 8, wherein one of the limiting holes is formed at each of opposite ends of the fixing piece along the first direction, and the two limiting holes are different in shape.

10. A display device comprising a switching assembly according to any one of claims 1 to 9.