Self-charging sound with rod changing for projection screen

Abstract

The application discloses a rod-changing self-charging sound device for a projection screen, which comprises a sound device capable of being arranged on the screen, a rechargeable battery arranged in the sound device and used for supplying power for the sound device, a contactable electric connection structure arranged between the sound device and a main body of the screen, and the rechargeable battery is capable of being connected with an external power supply through the contactable electric connection structure to be charged. The above structure not only guarantees the original effect and function of the screen, but also combines the sound device and the screen together, which is not only beautiful, but also does not need to occupy the ground space in the room, avoids the problems of occupying the ground and table space and being not beautiful, and does not need manual plug-in power connection each time, so that the use is more convenient.

Description

Technical Field

[0001] The present invention relates to a projection screen, in particular to a rod-changing self-charging speaker for the projection screen. Background Art

[0002] Projection screens are common items in office and daily life. They are generally used in movies, offices, home theaters, large conferences and other occasions to display images and video files.

[0003] The structure of an ordinary projection screen generally includes a screen body, the screen, and a bottom rod fixed to the bottom end of the screen. The screen can be rolled up into the screen body, and the bottom rod can prevent the screen from being completely rolled up into the screen body and unable to be used normally; it also strengthens the downward force to make the screen flatter.

[0004] Ordinary projection screens need to be used with a projector and speakers to achieve complete playback. However, ordinary speakers need to occupy additional floor or table space in the room when in use, and need to be stored in additional space when not in use. Moreover, the power cord on the floor or table not only takes up space and is unsightly, but also is troublesome to plug in and connect to the power supply. In particular, sometimes there may not be a socket in a suitable location on site, and a power strip needs to be connected. Therefore, the applicant has designed a speaker specifically for projection screens to solve the above problems. Summary of the Invention

[0005] In order to overcome the deficiencies of the prior art, the present invention provides a rod-changing self-charging speaker for a projection screen.

[0006] The technical solution adopted by the present invention to solve its technical problem is:

[0007] A rod-changing self-charging speaker for a projection screen includes a speaker that can be set on the screen, a rechargeable battery for powering the speaker, and a contactable electrical connection structure between the speaker and the screen body. The rechargeable battery can be charged by being connected to an external power source through the contactable electrical connection structure.

[0008] The contactable electrical connection structure includes a charging contact 1 and a charging contact 2 capable of contacting the charging contact 1. The charging contact 1 is connected to a power source, and the charging contact 2 is connected to a rechargeable battery.

[0009] The first charging contact is mounted on a contact piece seat, the second charging contact is mounted on a sound housing, and the contact piece seat is mounted on a curtain body.

[0010] The contact piece seat is fixed on the curtain body through a connecting belt.

[0011] A mounting groove is provided in the contact seat, and a contact hole is provided at the bottom of the mounting groove. The charging contact 1 is stuck in the mounting groove, and one end is exposed to the bottom surface of the contact seat through the contact hole, and the charging contact 1 is locked in the mounting groove through the seat cover.

[0012] A spring hole is provided in the mounting groove, the contact hole is connected to the spring hole, a return spring is provided in the spring hole, one end of the return spring abuts against the charging contact, and the other end of the return spring abuts against the seat cover.

[0013] The connecting belt includes belt one and belt two, and the ends of belt one and belt two are both provided with belt heads. Belt grooves are relatively provided on the groove walls of the installation groove. The belt one and belt two pass through the corresponding belt grooves, and the belt heads are located in the installation groove and are locked with the installation groove.

[0014] The first belt is provided with a clamping column, and the second belt is provided with a clamping hole matched with the corresponding clamping column.

[0015] A charging circuit board is provided in the mounting groove, and the other end of the reset spring abuts against the charging circuit board.

[0016] The speaker is fixed to the bottom edge of the curtain through a connecting structure. The connecting structure includes a card slot arranged on the outer shell of the speaker, and the card slot can be locked with a card strip arranged on the bottom edge of the curtain.

[0017] The beneficial effects of the present invention are as follows: the speakers of the present invention can be installed on a curtain, and the speakers replace the bottom bar at the bottom edge of the previous curtain, thereby ensuring the original effects and functions of the curtain and combining the speakers and the curtain together, which is not only beautiful but also does not require indoor floor space. A rechargeable battery for powering the speakers is provided in the speakers, and a contactable electrical connection structure is provided between the speakers and the curtain body. The rechargeable battery can be charged by being connected to an external power source through the contactable electrical connection structure, so the power cord does not need to be directly connected to the speakers, but only needs to be connected to the contactable electrical connection structure, thereby avoiding the problem of occupying floor and desktop space and being unsightly, and there is no need to plug in the wires to connect to the power every time, so it is more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings and examples.

[0019] Figure 1 This is a structural view of the projection screen when it is in the rolled-up state;

[0020] Figure 2 This is a partial exploded structural view of the projection screen;

[0021] Figure 3 This is a structural view of the speaker's housing and end caps;

[0022] Figure 4 It is an exploded view of the contact seat structure;

[0023] Figure 5 This is a structural view of the contact seat;

[0024] Figure 6 This is a structural diagram of the charging contact and the copper needle. DETAILED DESCRIPTION

[0025] The advantages and features of the present disclosure and its implementation methods will be illustrated by the following embodiments described with reference to the accompanying drawings. However, the present disclosure can be embodied in different forms and should not be construed as being limited to the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure will be comprehensive and complete and will fully convey the scope of the present disclosure to those skilled in the art. Furthermore, the present disclosure is limited only by the scope of the claims.

[0026] The shapes, sizes, proportions, angles and numbers disclosed in the drawings for describing the embodiments of the present disclosure are merely examples, and therefore the present disclosure is not limited to the details shown. Throughout this specification, the same reference numerals refer to the same elements. In the following description, when a detailed description of a related known function or configuration is determined to be unnecessary to obscure the focus of the present disclosure, the detailed description will be omitted. Where “including”, “having” and “comprising” described in this specification are used, other components may be added unless “only” is used. Unless otherwise indicated, terms in the singular may include plural forms.

[0027] When explaining an element, although not explicitly described, the element is understood to include a range of error.

[0028] When describing a positional relationship, for example, when the positional relationship is described as "on," "above," "below," and "adjacent to," one or more parts may be arranged between two other parts, unless "immediately" or "directly" is used.

[0029] When describing a temporal relationship, for example, when a temporal order is described as “after,” “subsequently,” “next,” and “before,” discontinuous cases may be included unless “just” or “directly” is used.

[0030] It should be understood that although the terms "first," "second," etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from other elements. For example, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element without departing from the scope of this disclosure.

[0031] As will be fully appreciated by those skilled in the art, the features of the different embodiments of the present disclosure may be coupled or combined with each other in part or in whole, and may cooperate with each other in various ways and be driven technically. The embodiments of the present disclosure may be performed independently of each other, or may be performed together in a mutually dependent relationship.

[0032] Reference Figures 1 to 5 The present invention discloses a rod-changing self-charging speaker for a projection screen. The screen body 1 includes a square strip-shaped shell and a built-in reel and motor. One side of the screen 2 is fixed to the reel, so that the motor can drive the reel to rotate and drive the screen 2 to retract or extend. The screen body 1 is a conventional design and is not a technical improvement point of this application, so the specific structure is not described in detail. In this application, a speaker 9 is installed at the bottom edge of the screen 2. A rechargeable battery (not shown in the figure) for powering the speaker 9 is provided in the speaker 9. A contactable electrical connection structure is provided between the speaker 9 and the screen body 1. The rechargeable battery can be charged by being connected to an external power source through the contactable electrical connection structure.

[0033] As shown in the figure, the speaker 9 is fixed to the bottom edge of the curtain 2 through a connecting structure. The connecting structure includes a slot 3 provided on the outer shell of the speaker 9. The slot 3 can be clamped with a clamping strip 4 provided on the bottom edge of the curtain 2. The clamping strip 4 is a rubber strip. The clamping strip 4 can be sewn together with the curtain 2 through a thread, or the bottom end of the curtain 2 can be rolled up and sewn into a tube, and the clamping strip 4 is wrapped in the tube, and then clamped together in the slot 3. The clamping strip 4 can be a structure of the curtain itself for clamping with the bottom rod. Therefore, the connecting structure of the present application can make full use of the original structure on the curtain to achieve connection without the need to modify the curtain. Preferably, the cross section of the slot 3 is a triangle, and the cross section of the clamping strip 4 is a triangle. Of course, it can also be a trapezoidal or T-shaped or other shapes.

[0034] As the preferred structure of the present application, the card slot 3 is arranged on the top surface of the shell and is connected to the outside at both ends. End covers 5 are provided at both ends of the shell. The end covers 5 close the end surfaces of the card slot 3. Therefore, during assembly, the card strip 4 can be inserted into the card slot 3 from one end of the shell, and then the end cover 5 is installed to close the end surface of the card slot 3, thereby clamping the card strip 4 in the card slot 3. The end cover 5 is fixed to the end surface of the shell by screws for easy installation.

[0035] As shown in the figure, the contactable electrical connection structure includes a charging contact 16 and a charging contact 27 that can contact the charging contact 16. The charging contact 16 is connected to the power supply, and the charging contact 27 is connected to the rechargeable battery. Therefore, when the charging contact 16 contacts the charging contact 27, the power supply can charge the rechargeable battery. As a further structure, the charging contact 16 is installed on the contact seat 8, the charging contact 27 is installed on the speaker 9 shell, and the contact seat 8 is installed on the curtain body 1. Through the above structure, we can make full use of the retraction or expansion of the curtain 2 to realize the charging and power-off of the rechargeable battery, and the curtain 2 is used when it is expanded. Time, so the charging contact 1 6 is separated from the charging contact 2 7, and the rechargeable battery is in a state of supplying power to the speaker 9, and when the curtain 2 is rolled up, it is not in use. At this time, the charging contact 1 6 is in contact with the charging contact 2 7, thereby realizing automatic charging of the rechargeable battery. The above process does not require manual operation, and there is no need to increase the structure for controlling the contact and separation of the charging contact 1 6 and the charging contact 2 7. Moreover, the speaker 9 of the present application needs to be raised and lowered. If powered by a power cord, it needs to move with the speaker 9, so the wiring is also more troublesome and needs to be coordinated with the speaker 9. Therefore, the present application adopts a contactable electrical connection structure instead of the power cord, thereby avoiding the above problems and being more beautiful.

[0036] As a further structure, a mounting groove 10 is provided in the contact holder 8, and the mounting groove 10 is a square groove. A contact hole 12 is provided at the bottom of the mounting groove 10. The charging contact 6 of the present application is a "T"-shaped copper plate, so the contact hole 12 is a narrow and long square hole. The foot end of the charging contact 6 is inserted from the contact hole 12 to expose the bottom surface of the contact holder 8, and the two ends of the charging contact 6 are stuck in the mounting groove 10 and cannot be detached from the contact hole 12, and the charging contact 6 is locked in the mounting groove 10 by the seat cover. As a preferred structure, a spring hole 11 is provided in the mounting groove 10, and the contact hole 12 is connected to the spring hole 11, and the contact hole 12 extends to the hole wall of the spring hole 11 to split the spring hole 11 into two halves, so that it is convenient for the charging contact 1 6 to be inserted into the contact hole 12 from the spring hole 11. A reset spring 13 is provided in the spring hole 11, and one end of the reset spring 13 is against the charging contact 1 6, and the other end of the reset spring 13 is against the seat cover. The setting of the reset spring 13 makes the contact between the charging contact 1 6 and the charging contact 2 7 elastic, thereby ensuring good contact and being able to adapt to larger lifting errors. The charging contact 2 7 of the present application is also formed into a "concave" shape by bending the copper sheet, and a socket is provided on the end cover 5. The two side plates formed by the bending are inserted into the end cover 5 through the socket, so that they can be connected to the rechargeable battery. Figure 6 As shown, the charging contact 6 can also be a copper needle.

[0037] As a preferred structure, the bottom surface of the contact seat 8 is further provided with a guide plate 14, and the guide plate 14 is provided with a guide inclined surface, so that when the curtain 2 is rolled up, the sound 9 can gradually correct its own position along the guide inclined surface, preventing the sound 9 from being unable to align the positions of the charging contact one 6 and the charging contact two 7 due to the shaking of the curtain 2.

[0038] As shown in the figure, the mounting slot 10 is provided with a charging circuit board 15, the charging circuit board 15 is connected with the charging contact one 6 through a wire, and the other end of the reset spring 13 abuts against the charging circuit board 15. Because the voltage and current of the power supply of the projection curtain 2 are different from the voltage and current required by the rechargeable battery, it is necessary to set the charging circuit board 15 to regulate the voltage power supply. However, the charging circuit board 15 is universal in the charging equipment, and the present application does not improve the circuit itself, but only optimizes the mounting structure of the circuit board, so that the reset spring 13 can be pressed in the spring hole 11 to be fixed. The charging circuit board 15 is fixed in the mounting slot 10 through a screw. Of course, the mounting slot 10 is provided with a plug-in terminal connected with the charging circuit board 15, and the plug-in terminal can be connected with the external power supply through the charger.

[0039] As shown in the figure, the contact seat 8 is fixed to the curtain main body 1 through a connecting belt, and the connecting belt is adjustable, so it can adapt to various shapes of the curtain main body 1. The connecting belt includes a belt one 16 and a belt two 17, the end of the belt one 16 and the belt two 17 is provided with a belt head 18, and the slot wall of the mounting slot 10 is provided with a belt slot 19 in opposite, the belt one 16 and the belt two 17 pass through the corresponding belt slot 19, and the belt head 18 is located in the mounting slot 10 and is clamped with the mounting slot 10. The above structure is simple to install, and the connecting belt and the contact seat 8 do not need to be directly fixed by screws, so the assembly saves time. As a further preferred, the belt one 16 is provided with a clamping column 20, and the belt two 17 is provided with a clamping hole matched with the corresponding clamping column 20, so as to facilitate adjustment and adapt to different thicknesses of the curtain main body 1.

[0040] The above describes a kind of projection curtain 2 for rod type self-charging sound 9 provided by the embodiment of the present application in detail, specific examples are applied in this paper to describe the principle and implementation mode of the present application, the above embodiment is only used to help understand the method and core idea of the present application;Meanwhile, for the general technical personnel in the art, according to the idea of the present application, the specific implementation mode and application range will be changed, and the above description should not be understood as the limitation of the present application.

Claims

1. A self-charging speaker with a replacement rod for projection screen, characterized by: The present invention comprises a speaker that can be set on a screen, wherein a rechargeable battery for powering the speaker is provided inside the speaker, a contactable electrical connection structure is provided between the speaker and the main body of the screen, the rechargeable battery can be charged by being connected to an external power source through the contactable electrical connection structure, and the charging and power-off of the rechargeable battery are achieved by utilizing the retraction or expansion of the screen, the main body of the screen comprises a square strip-shaped outer shell, the contactable electrical connection structure comprises a charging contact 1 and a charging contact 2 that can contact the charging contact 1, the charging contact 1 is connected to the power source, and the charging contact 2 is connected to the rechargeable battery, the speaker is fixed to the bottom edge of the screen through a connection structure, and the connection structure comprises a card slot provided on the outer shell of the speaker, and the card slot can be locked with a card strip provided on the bottom edge of the screen.

2. The rod-changing self-charging speaker for projection screen according to claim 1, characterized in that: The first charging contact is mounted on a contact piece seat, the second charging contact is mounted on a sound housing, and the contact piece seat is mounted on a curtain body.

3. The rod-changing self-charging speaker for projection screen according to claim 2, characterized in that: The contact piece seat is fixed on the curtain body through a connecting belt.

4. The rod-changing self-charging speaker for projection screen according to claim 3, characterized in that: A mounting groove is provided in the contact seat, and a contact hole is provided at the bottom of the mounting groove. The charging contact 1 is stuck in the mounting groove, and one end is exposed to the bottom surface of the contact seat through the contact hole, and the charging contact 1 is locked in the mounting groove through the seat cover.

5. The rod-changing self-charging speaker for projection screen according to claim 4, characterized in that: A spring hole is provided in the mounting groove, the contact hole is connected to the spring hole, a return spring is provided in the spring hole, one end of the return spring abuts against the charging contact, and the other end of the return spring abuts against the seat cover.

6. The rod-changing self-charging speaker for projection screen according to claim 4, characterized in that: The connecting belt includes belt one and belt two, and the ends of belt one and belt two are both provided with belt heads. Belt grooves are relatively provided on the groove walls of the installation groove. The belt one and belt two pass through the corresponding belt grooves, and the belt heads are located in the installation groove and are locked with the installation groove.

7. The rod-changing self-charging speaker for projection screen according to claim 6, characterized in that: The first belt is provided with a clamping column, and the second belt is provided with a clamping hole matched with the corresponding clamping column.

8. The rod-changing self-charging speaker for projection screen according to claim 5, characterized in that: A charging circuit board is provided in the mounting groove, and the other end of the reset spring abuts against the charging circuit board.

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