An appearance changeable story machine

Abstract

The utility model relates to audio equipment technical field, and disclose a kind of appearance replaceable story machine, including sound module, sound module surface is equipped with shell module, sound module includes sound main body, and sound main body one end is equipped with thread groove;Shell module includes: inner cover;Conical shell;Fastener;Reset boss.The utility model is by using the thread connection of inner cover and sound main body as main fixed mode, and reset boss is provided with supporting force in addition, and two groups of fastener are separated to realize idling, and this composite connection structure is difficult to dismantle by hand for children, effectively prevent the small part mistake swallowing risk caused by shell being easily disassembled;And for adult, by pressing operation, two groups of fastener can be contacted, so that conical shell is replaced by screw loose, and the convenience of shell replacement is balanced with safety.

Description

Technical Field

[0001] This utility model belongs to the field of audio equipment technology, and specifically relates to a story machine with interchangeable appearance. Background Technology

[0002] A story machine is a smart early education device designed specifically for children. It can play various audio content such as stories, nursery rhymes, Chinese classics, English learning, and basic math. It usually includes audio speakers and microphones and is powered by a built-in battery.

[0003] In the current technology, the children's story machines on the market usually have a fixed appearance design.

[0004] In an effort to attract children's interest, some products attempt to offer replaceable shells or decorative components. However, these products have serious defects and hidden dangers in their safety design. Most existing replaceable shells use simple snaps or magnetic connections, which are too easy for children to open. The disassembly and assembly process lacks the necessary cognitive and operational threshold.

[0005] Children can easily disassemble the casing when unsupervised, and the small casings or internal parts they remove can easily be put into their mouths, causing accidental swallowing and choking accidents. At the same time, the exposed battery compartment and other key parts give children the opportunity to directly access the batteries, which also poses a risk of accidental ingestion.

[0006] Furthermore, even though some products attempt to use screws for fixing, while improving safety, they completely sacrifice the convenience and fun of changing the appearance, rendering the replaceable function useless. It is difficult to change the appearance easily and fails to meet the core need of continuously attracting children's attention through changing the appearance. Utility Model Content

[0007] The purpose of this invention is to address the shortcomings of existing technologies by proposing a story machine with an interchangeable appearance.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: a story machine with a replaceable shape, including a sound module, the surface of which is provided with a shell module, the sound module including a sound body, one end of which has a threaded groove; the shell module includes: an inner cover, the inner circumferential surface of which has a threaded groove, the inner circumferential surface of which is threadedly connected to one end of the sound body; a conical shell, the inner circumferential surface of which is rotatably connected to the circumferential surface of the inner cover; a locking component, the locking component having two sets, each set including multiple locking components, the two sets of locking components being symmetrically distributed and respectively fixed to the surfaces of the inner cover and the conical shell; a reset convex pad, one end of which is fixed to one end of the inner wall of the conical shell, and the other end of which is fitted to one end of the inner cover.

[0009] Preferably, the inner circumferential surface of the conical outer shell is provided with an inner ring groove, a set of clips is fixed on one side of the inner wall of the inner ring groove, a rotating ring is provided on the inner wall of the inner ring groove, another set of clips is fixed on the side of the rotating ring near the clips, and the inner circumferential surface of the rotating ring is fixed to the outer circumferential surface of the inner cover.

[0010] Preferably, all the card pieces are in the shape of a right-angled trapezoid, and the right-angled side of the card piece is fixed to the surface of the conical shell and the rotating ring; the reset convex pad is in the shape of a circle with an arc cross-section.

[0011] Preferably, a stabilizing plate is fixed to the end of the audio module away from the threaded groove, and a rubber pad is glued to the bottom of the stabilizing plate. The diameter of the stabilizing plate is larger than the diameter of the audio body.

[0012] Preferably, the stabilizing plate has a reserved annular groove on the side near the speaker body.

[0013] Preferably, both sides of the reserved annular groove are set as deflected arc surfaces.

[0014] Preferably, the outer edge of the conical shell near the stabilizing plate is set as a bottom rounded end.

[0015] Preferably, the inner circumferential surface of the conical shell near the stabilizing plate has a bottom groove, and an outer limiting member is fixed in a circumferential array on the inner wall of the bottom groove; an inner limiting member that intersects with the outer limiting member is fixed in a circumferential array on the circumferential surface of the speaker body near the stabilizing plate.

[0016] In summary, this utility model has the following beneficial effects: 1. This utility model uses a threaded connection between the inner cover and the speaker body as the main fixing method, supplemented by a reset convex pad to provide support, allowing the two sets of clips to disengage and rotate freely. This composite connection structure is difficult for children to disassemble by hand, effectively preventing the risk of swallowing small parts due to easy disassembly of the outer shell; while for adults, the two sets of clips can be brought into contact by pressing, thereby loosening the screws and replacing the conical outer shell, balancing safety and the convenience of shell replacement. 2. This utility model, through the cooperation of the inner ring groove and the rotating ring, assists in the rotation between the conical shell and the rotating ring while ensuring that both sets of locking parts are set in the inner ring groove. After the conical shell is pressed and the two sets of locking parts are connected, the locking parts are restricted in the inner ring groove by the conical shell and the inner cover, preventing the two sets of locking parts from deflecting or tilting and breaking when the user rotates the conical shell, thus improving the service life of the component. 3. This utility model provides movement space for the conical shell when it is pressed by reserving a ring groove, so that the bottom end of the conical shell can be flush with the top end of the stabilizing plate, thereby eliminating gaps and preventing pinching. When the user holds the conical shell and rotates it, the conical shell will undergo partial deformation. The deflection arc surface ensures that the conical shell will not contact the surface of the stabilizing plate even if it deforms, preventing abnormal wear. The rounded bottom end and the arc shape of the deflection arc surface further prevent pinching and improve the user experience. 4. This utility model, through the cooperation between the outer limiter and the inner limiter, ensures that when the user does not press the conical shell, the outer limiter and the inner limiter are at the same height. At this time, the rotation is affected by the resistance between the outer limiter and the inner limiter, and can only rotate a small angle. This further prevents children from opening the conical shell and also prevents the reset pad from being worn due to repeated spinning of the conical shell without pressing it, thus improving the service life of the component. 5. In this invention, after the user presses the conical outer shell, the outer limiting part descends with the height of the conical outer shell, while the inner limiting part is located in the bottom groove, allowing the user to smoothly rotate the conical outer shell until the threaded connection between the inner cover and the speaker body is released. Because the inner ring groove has sufficient width, the outer limiting part and the inner limiting part will not come into contact when the conical outer shell is loosened and raised. Furthermore, after the threaded connection between the inner cover and the speaker body is released, the user needs to align the outer limiting part and the inner limiting part before removing the device, further preventing children from opening it. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is an exploded view of the conical outer shell of this utility model; Figure 3 This is a cross-sectional view of the outer limiting component of this utility model; Figure 4 This is a cross-sectional view of the rotating ring component of this utility model; Figure 5 This is a cross-sectional view of the resetting convex pad of this utility model; Figure 6 This is a cross-sectional view of the card component of this utility model; Figure 7 This is a cross-sectional view of the stabilizing plate of this utility model.

[0018] Figure label: 1. Housing module; 101. Audio module; 2. Conical outer shell; 201. Inner cover; 202. Clip; 203. Reset pad; 204. Speaker body; 3. Inner ring groove; 301. Swirl ring component; 4. Stabilizing plate; 5. Reserve annular groove; 6. Deflection of curved surfaces; 7. Bottom round end; 8. Bottom groove; 801. Outer limiting component; 802. Inner limiting component. Detailed Implementation

[0019] To make the technical means, creative features, and achieved objectives and effects of this utility model easier to understand, the present utility model is further described below with reference to specific embodiments and accompanying drawings. However, the following embodiments are merely preferred embodiments of this utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described in the implementation plan without creative effort are all within the protection scope of this utility model.

[0020] The specific embodiments of this utility model are described below with reference to the accompanying drawings: Example

[0021] refer to Figures 1-7 A story machine with interchangeable shapes includes a sound module 101, with a shell module 1 on its surface. The sound module 101 includes a sound body 204, one end of which has a threaded groove. The shell module 1 includes: an inner cover 201, the inner circumferential surface of which has a threaded groove and is threadedly connected to one end of the sound body 204; a conical shell 2, the inner circumferential surface of which is rotatably connected to the circumferential surface of the inner cover 201; two sets of locking pieces 202, each set including multiple locking pieces 202, the two sets of locking pieces 202 being symmetrically distributed and fixed to the surfaces of the inner cover 201 and the conical shell 2, respectively; and a reset convex pad 203, one end of which is fixed to one end of the inner wall of the conical shell 2, and the other end of which is attached to one end of the inner cover 201.

[0022] Specifically, the inner cover 201 is connected to the speaker body 204 by a thread as the main fixing method, and a reset convex pad 203 is used to provide support, allowing the two sets of clips 202 to disengage and rotate freely. This composite connection structure is difficult for children to disassemble by hand, effectively preventing the risk of swallowing small parts caused by easy disassembly of the outer shell. For adults, pressing the two sets of clips 202 can make them come into contact, thereby loosening the screws and replacing the conical outer shell 2, balancing safety and the convenience of shell replacement.

[0023] The inner circumferential surface of the conical outer shell 2 is provided with an inner ring groove 3. A set of clips 202 is fixed on one side of the inner wall of the inner ring groove 3. A rotating ring 301 is provided on the inner wall of the inner ring groove 3. Another set of clips 202 is fixed on the side of the rotating ring 301 near the clips 202. The inner circumferential surface of the rotating ring 301 is fixed to the outer circumferential surface of the inner cover 201.

[0024] All the clips 202 are in the shape of a right trapezoid, and the right angle side of the clip 202 is fixed to the surface of the conical shell 2 and the rotating ring 301; the reset pad 203 is in the shape of a circle with an arc cross section.

[0025] Specifically, through the cooperation of the inner ring groove 3 and the rotating ring 301, while the auxiliary conical shell 2 rotates between the rotating ring 301, both sets of locking pieces 202 are positioned in the inner ring groove 3. After the conical shell 2 is pressed to make the two sets of locking pieces 202 engage, the locking pieces 202 are both restricted in the inner ring groove 3 by the conical shell 2 and the inner cover 201, preventing the two sets of locking pieces 202 from deflecting or tilting and breaking when the user rotates the conical shell 2, thus improving the service life of the component.

[0026] A stabilizing plate 4 is fixed to the end of the audio module 101 away from the threaded groove. A rubber pad is glued to the bottom of the stabilizing plate 4. The diameter of the stabilizing plate 4 is larger than the diameter of the audio body 204.

[0027] A reserved annular groove 5 is provided on the side of the stabilizing plate 4 near the speaker body 204.

[0028] The edges of both sides of the reserved annular groove 5 are set as deflection arc surfaces 6.

[0029] The outer edge of the conical shell 2 near the stabilizing plate 4 is set as the bottom round end 7.

[0030] Specifically, the reserved annular groove 5 provides space for the conical outer shell 2 to move when pressed, so that the bottom end of the conical outer shell 2 can be at the same height as the top end of the stabilizing plate 4, thereby preventing pinching caused by small gaps; when the user holds the conical outer shell 2 and rotates it, the conical outer shell 2 will undergo partial deformation, and the deflection arc surface 6 ensures that the conical outer shell 2 does not contact the surface of the stabilizing plate 4 even if it deforms, preventing abnormal wear; the rounded bottom end 7 and the arc shape of the deflection arc surface 6 further prevent pinching and improve the user experience.

[0031] The conical outer shell 2 has a bottom groove 8 on the inner circumferential surface near the stabilizing plate 4, and an outer limiting member 801 is fixed in a circumferential array on the inner wall of the bottom groove 8; the speaker body 204 has an inner limiting member 802 that intersects with the outer limiting member 801 in a circumferential array on the circumferential surface near the stabilizing plate 4.

[0032] Specifically, through the cooperation between the outer limiting member 801 and the inner limiting member 802, when the user does not press the conical outer shell 2, the outer limiting member 801 and the inner limiting member 802 are at the same height. At this time, rotation is limited by the resistance between the outer limiting member 801 and the inner limiting member 802, allowing only a small angle of rotation. This further prevents children from opening the conical outer shell 2 and also prevents wear on the reset pad 203 caused by repeated spinning of the conical outer shell 2 when the child does not press it, thus improving the service life of the component. After the user presses the conical outer shell 2, the outer limiting member 801 moves with the conical outer shell. The cone-shaped outer shell 2 is lowered to a certain height, while the inner limiter 802 is located in the bottom groove 8, allowing the user to smoothly rotate the cone-shaped outer shell 2 until the threaded connection between the inner cover 201 and the speaker body 204 is released. Since the inner ring groove 3 has sufficient width, the outer limiter 801 and the inner limiter 802 will not come into contact when the cone-shaped outer shell 2 is loosened and raised. After the threaded connection between the inner cover 201 and the speaker body 204 is released, the user needs to align the outer limiter 801 and the inner limiter 802 before removing it, further preventing children from opening it. Example

[0033] refer to Figures 1-7 Staff members used the structure disclosed in this utility model in the user experience laboratory of a children's education product company. Researchers have developed a new type of smart story machine for families with children aged 3-6. This product features a replaceable outer shell structure. The speaker module uses the HS-AX35 Bluetooth audio module manufactured by Shanghai Husheng Electronics. Its aluminum alloy speaker body has a diameter of 45 mm and is machined with standard fine-pitch M36x1.5 threads on the bottom. The inner cover of the outer shell module is injection molded from food-grade ABS plastic, with pre-embedded brass threaded inserts on the inner wall to form a precise threaded fit with the speaker body. The conical outer shell maintains a 2 mm gap with the inner cover through a reset pad made of medical-grade silicone. The reset pad is a hemispherical structure with a diameter of 8 mm and a thickness of 3 mm.

[0034] In the safety locking mechanism, the annular groove on the inner wall of the conical outer shell is 6 mm wide and 4 mm deep. Six sets of right-angled trapezoidal locking elements are symmetrically arranged within the groove. Each set of locking elements has a base length of 5 mm and a hypotenuse angle of 60 degrees. These are integrally injection molded from POM engineering plastic and the conical outer shell. A corresponding rotating ring is fixed to the outer circumference of the inner cover, also with six matching locking elements. The bottom limiting mechanism includes eight limiting units arranged at 45-degree intervals. Both the outer and inner limiting elements are nylon protrusions with a height of 4 mm, staggered to form an effective rotation range of 15 degrees.

[0035] In actual testing, when a 3-year-old attempted to rotate the penguin-shaped cone-shaped outer shell, the two sets of locking mechanisms remained separated because the axial pressure of 4 Newtons could not be applied simultaneously. The shell could only rotate 15 degrees before being stopped by the limiting mechanism. When an adult replaces the shell, they first apply 5 Newtons of pressure by holding the shell with their thumb and forefinger, compressing the reset pad by 1.5 mm. At this point, the two sets of locking mechanisms fully engage, and the outer limiting component descends into the bottom groove, avoiding the inner limiting component. After rotating 120 degrees clockwise, the threaded connection between the inner cover and the speaker body is completely released. Continue rotating until the outer limiting component aligns with the notch of the inner limiting component, and the shell can be removed and replaced with shapes such as cows, rabbits, or cars.

[0036] The entire replacement process takes approximately 20 seconds. After 2000 cycles of testing, the elastic recovery rate of the reset pad remains at 92%, and the wear on the clip is less than 0.1 mm. This design effectively prevents the risk of accidental disassembly by young children while maintaining versatility in design.

[0037] The working principle of this utility model: Step 1: Under normal use, the outer casing module 1 is primarily fixed by screwing the inner cover 201 onto the end of the speaker body 204 via threads. At this time, the conical outer casing 2 maintains a certain distance from the inner cover 201 under the elastic support of the reset convex pad 203. Therefore, one set of clips 202 fixed to the inner wall of the conical outer casing and another set of clips 202 fixed to the outer periphery of the inner cover 201 are separate from each other.

[0038] If a child directly rotates the conical outer casing 2, the torque cannot be transmitted to the inner cover 201 because the two sets of clips 202 are not engaged. The threaded connection between the inner cover 201 and the speaker body 204 will not loosen, and the outer casing cannot be unscrewed. This is called the "free-spinning" state.

[0039] Meanwhile, at the bottom of the conical outer shell 2, the outer limiting member 801 and the inner limiting member 802 on the speaker body 204 are intersected in height, forming mechanical interference. Even if a child tries to rotate it forcefully, the conical outer shell 2 can only rotate within a very small angle before being stopped by the limiting member, further preventing meaningless repeated spinning from causing wear on internal reset pads 203 and other parts.

[0040] Step 2: When an adult needs to replace the outer shell, the adult should hold the conical outer shell 2 with their hand and apply a pressing force along the axial direction towards the stabilizing plate 4. This pressing force overcomes the elasticity of the reset convex pad 203, causing the conical outer shell 2 to shift slightly towards the inner cover 201.

[0041] As the conical outer shell 2 shifts, the set of clips 202 fixed thereon comes into contact with and engages with another set of clips 202 fixed on the inner cover 201. Because the clips 202 are right-angled trapezoids, they can effectively transmit torque.

[0042] At the same time, the downward movement of the conical outer shell 2 causes the outer limiting member 801 at its bottom to drop accordingly, thereby offsetting it in height from the inner limiting member 802 and releasing the rotation limit.

[0043] Step 3: While maintaining the pressing position, the adult rotates the conical outer shell 2. At this time, the rotational torque is effectively transmitted to the inner cover 201 through the two sets of engaged clips 202. The inner cover 201 rotates accordingly and gradually unscrews and loosens due to its threaded connection with the speaker body 204.

[0044] Throughout the process, the inner ring groove 3 and the rotating ring 301 provide a stable guiding space for the movement of the clamp 202, preventing it from being deflected and damaged. The reserved ring groove 5 ensures that the conical outer shell 2 has sufficient pressing stroke, while the deflecting arc surface 6 and the bottom round end 7 avoid the risk of friction or pinching when the parts are deformed or moved.

[0045] Step 4: After the inner cover 201 is completely unscrewed from the speaker body 204, the threaded connection is released. At this point, the user cannot directly pull out the outer casing. This is because the outer limiting member 801 at the bottom of the conical outer casing 2 intersects with the inner limiting member 802 on the speaker body 204, forming an obstruction. The user must rotate the conical outer casing 2 to a specific angle so that the notches of the outer limiting member 801 and the inner limiting member 802 are aligned before the entire outer casing module 1 can be removed upwards.

[0046] The process of installing the new outer shell is the reverse: put the outer shell module 1 on, align it with the notch of the limiting piece, press down and rotate in the opposite direction until the inner cover 201 is tightened with the speaker body 204.

[0047] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0048] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A story machine with interchangeable exterior shapes, comprising a sound module (101), wherein the surface of the sound module (101) is provided with a shell module (1), characterized in that: The audio module (101) includes an audio body (204), one end of which has a threaded groove; the outer shell module (1) includes: an inner cover (201), the inner circumferential surface of which has a threaded groove, and the inner circumferential surface of which is threadedly connected to one end of the audio body (204); a conical outer shell (2), the inner circumferential surface of which is rotatably connected to the circumferential surface of the inner cover (201); a locking piece (202), which has two sets and each set includes multiple locking pieces (202), the two sets of locking pieces (202) are symmetrically distributed and are fixed to the surfaces of the inner cover (201) and the conical outer shell (2) respectively; a reset convex pad (203), one end of which is fixed to one end of the inner wall of the conical outer shell (2), and the other end of which is attached to one end of the inner cover (201).

2. The story machine with interchangeable exterior shapes according to claim 1, characterized in that: The conical outer shell (2) has an inner ring groove (3) on its inner circumferential surface. A set of clips (202) is fixed on one side of the inner wall of the inner ring groove (3). A rotating ring (301) is provided on the inner wall of the inner ring groove (3). Another set of clips (202) is fixed on the side of the rotating ring (301) near the clips (202). The inner circumferential surface of the rotating ring (301) is fixed to the outer circumferential surface of the inner cover (201).

3. The story machine with interchangeable shapes according to claim 2, characterized in that: The card (202) is in the shape of a right trapezoid, and the right angle side of the card (202) is fixed to the surface of the conical shell (2) and the rotating ring (301); the reset convex pad (203) is in the shape of a circle with an arc cross section.

4. A story machine with interchangeable exterior shapes according to claim 1, characterized in that: The speaker module (101) has a stabilizing plate (4) fixed at the end away from the threaded groove. A rubber pad is glued to the bottom of the stabilizing plate (4). The diameter of the stabilizing plate (4) is larger than the diameter of the speaker body (204).

5. A story machine with interchangeable exterior shapes according to claim 4, characterized in that: The stabilizing plate (4) has a reserved annular groove (5) on the side near the speaker body (204).

6. A story machine with interchangeable exterior shapes according to claim 5, characterized in that: The edges of both sides of the reserved annular groove (5) are set as deflection arc surfaces (6).

7. A story machine with interchangeable shapes according to claim 6, characterized in that: The outer edge of the conical shell (2) near the stabilizing plate (4) is set as the bottom round end (7).

8. A story machine with interchangeable exterior shapes according to claim 7, characterized in that: The conical shell (2) has a bottom groove (8) on the inner circumferential surface near the stabilizing plate (4), and an outer limiting member (801) is fixed in a circumferential array on the inner wall of the bottom groove (8); the speaker body (204) has an inner limiting member (802) that intersects with the outer limiting member (801) on the circumferential surface near the stabilizing plate (4).

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