Electric toothbrush

Abstract

An electric toothbrush characterized in that it comprises the following: a bracket, wherein the bracket is provided with a hollow section; a drive frame, wherein the drive frame comprises a frame body and a pin extending from the frame body to the top of the electric toothbrush, wherein the drive frame and the holder are elastically connected by an elastic section, the frame body is located in the hollow section, the frame body and the holder are largely spaced apart from each other, and the pin is designed to connect a toothbrush head; and a drive element, wherein the drive element is arranged on the frame body and the drive element can drive the drive frame to oscillate or vibrate relative to the holder during operation, so that the pin can drive the toothbrush head to oscillate or vibrate, wherein the size of the elastic section along the forward and backward direction of the electric toothbrush is smaller than the size of the elastic section along the left and right direction of the electric toothbrush, such that the oscillation amplitude of the pin along the forward and backward direction is larger than the oscillation amplitude of the pin along the left and right direction.

Description

TECHNICAL AREA

[0001] The present application relates to the technical field of oral care and in particular to an electric toothbrush. STATE OF THE ART

[0002] Electric toothbrushes generate high-frequency vibrations through the rapid rotation or vibration of the motor core, instantly breaking down the toothpaste into a fine foam and thoroughly cleaning the interdental spaces. Simultaneously, the vibration of the bristles promotes blood circulation in the oral cavity and has a massaging effect on the gums.

[0003] In the prior art, vibration is generated by the rotation of a motor-driven eccentric block. However, such a design has shortcomings regarding vibration frequency, vibration amplitude, and power transmission. The vibration delivered to the toothbrush head is heavily damped, the vibration efficiency is low, the amplitude is small, and the cleaning effect is inadequate. CONTENTS OF THE PRESENT USE SAMPLE

[0004] In order to solve or alleviate the problems of the aforementioned prior art, the present application aims to provide an electric toothbrush with improved cleaning performance.

[0005] The present application provides an electric toothbrush comprising the following: a bracket, wherein the bracket is provided with a hollow section; a drive frame, wherein the drive frame comprises a frame body and a pin extending from the frame body to the top of the electric toothbrush, wherein the drive frame and the holder are elastically connected by an elastic section, the frame body is located in the hollow section, the frame body and the holder are largely spaced apart from each other, and the pin is designed to connect a toothbrush head; and a drive element, wherein the drive element is arranged on the frame body and the drive element can drive the drive frame to oscillate or vibrate relative to the holder during operation, so that the pin can drive the toothbrush head to oscillate or vibrate, wherein the size of the elastic section along the forward and backward direction of the electric toothbrush is smaller than the size of the elastic section along the left and right direction of the electric toothbrush, such that the oscillation amplitude of the pin along the forward and backward direction is larger than the oscillation amplitude of the pin along the left and right direction.

[0006] In at least one possible embodiment, the drive frame is connected to the holder via the connecting section and the elastic section, wherein the connecting section is arranged around the pin, and the connecting section and the frame body are spaced apart from each other in the upward and downward direction of the electric toothbrush.

[0007] In at least one possible embodiment, one end of the elastic section is connected to the connecting section and the other end of the elastic section is connected to the support, so that the elastic section and the connecting section are formed in a U-shape.

[0008] In at least one possible embodiment, the pin and connecting section are joined together in one piece by injection molding.

[0009] In at least one possible embodiment, the elastic section is a sheet extending along the left and right directions as well as along the upward and downward directions of the electric toothbrush, and the size of the connecting section along the left and right directions of the electric toothbrush is identical to the size of the elastic section along the left and right directions of the electric toothbrush.

[0010] In at least one possible embodiment, the electric toothbrush further comprises a circuit board, wherein the circuit board is located on the front of the holder in the forward and reverse directions.

[0011] In at least one possible embodiment, a connecting section for the elastic section is provided at the upper end of the holder, wherein the connecting section for the elastic section is located on both sides of the electric toothbrush in the forward and backward directions, and the elastic section is connected to the holder via this connecting section for the elastic section, wherein the elastic section and the holder are spaced apart from each other in the forward and backward directions.

[0012] In at least one possible embodiment, the pin projects beyond the uppermost end of the elastic section in the upward and downward direction of the electric toothbrush.

[0013] In at least one possible embodiment, the output shaft of the drive element is connected to an eccentric block and the drive frame is equipped with a counterweight block, wherein the drive element drives the eccentric block to rotate so that the drive frame can be made to oscillate or vibrate, wherein the eccentric block is located on the underside of the drive element in the upward and downward direction of the electric toothbrush and the counterweight block is also located on the underside of the eccentric block.

[0014] In at least one possible embodiment, the holder is provided with a battery slot for inserting a battery.

[0015] By adopting the aforementioned technical solution, in which the size of the elastic section along the forward and backward direction is made smaller than the size of the elastic section along the left and right direction, the tapping amplitude of the pin along the forward and backward direction is greater than the oscillation amplitude of the pin along the left and right direction, so that the bristles of the toothbrush head tap against the tooth surface with a greater amplitude, thereby cleaning the spaces between the teeth and the gum line more effectively, massaging the gums, promoting blood circulation and improving the user's brushing experience. BRIEF DESCRIPTION OF THE DRAWING Fig. Figure 1 shows an exploded view of a partial assembly of an electric toothbrush according to an embodiment of the present application. Fig. Figure 2 shows a schematic structural representation of a partial assembly of an electric toothbrush according to an embodiment of the present application. Fig. Figure 3 shows a side view of an electric toothbrush according to an embodiment of the present application. Fig. Figure 4 shows a front view of an electric toothbrush according to an embodiment of the present application. Fig. Figure 5 shows a rear view of an electric toothbrush according to an embodiment of the present application. Fig. Figure 6 shows a schematic structural representation of a holder and a drive frame of an electric toothbrush according to an embodiment of the present application. Fig. Figure 7 shows an enlarged partial view of the internal structure of an electric toothbrush according to an embodiment of the present application.

[0016] Reference symbols in the figures: 100 toothbrush heads 1 Bracket 11 Hollow section 12 Battery mounting slot 13 Connection section for elastic section 2 Drive frame 21 Pin 22 Motor groove 23 Counterweight block groove 24 Elastic section 25 Connecting section 26 Frame body 3 Counterweight block 4 Motor 41 Eccentric block 5 shock absorber element 6 batteries 7 printed circuit board 8 sealing rings 9 Waterproof Ring A Upward and downward direction F Forward and backward direction R Left and right direction DETAILED DESCRIPTION

[0017] To explain in more detail the aforementioned purposes, features, and advantages of the present application, the specific embodiments of the present application are described in detail in this section with reference to the attached drawings. Besides the various embodiments described here, the present application can also be implemented in other ways, and those skilled in the art can make corresponding improvements, adaptations, and substitutions without infringing the spirit of the present application. Therefore, the present application is not limited to the specific embodiments described in this section. The scope of protection of the present application is governed by the claims.

[0018] In the following description, the up and down direction A of the electric toothbrush refers to the direction in which its axis extends, with the top being the side on which the toothbrush head 100 is located and the bottom being the side on which the brush handle is located. The forward and backward direction F of the electric toothbrush refers to the direction in which the bristles of the brush head extend, with the front being the side toward which the bristles point and the back being the side away from which the bristles point. The left and right direction R of the electric toothbrush is perpendicular to both the up and down direction A and the forward and backward direction F of the electric toothbrush.

[0019] As in the Fig. Figures 1 to 7 show an embodiment of the present application providing an electric toothbrush comprising a brush handle and a toothbrush head 100, wherein the toothbrush head 100 is interchangeably attached to the upper end of the brush handle.

[0020] The brush handle comprises a housing (not shown), a bracket 1, a drive frame 2, a counterweight block 3, a drive element (e.g. a motor 4), a shock absorber 5, a battery 6, a circuit board 7, a sealing ring 8 and a waterproof ring 9.

[0021] The bracket 1, the drive frame 2, the counterweight block 3, the motor 4, the shock absorber 5, the battery 6, the circuit board 7, and the sealing ring 8 can be housed in the casing. The upper end of the casing has an opening, and the battery 6 and circuit board 7 can be securely connected to the bracket 1. For example, the bracket 1 can be provided with a battery slot 12, and the battery 6 is installed in the battery slot 12.

[0022] The circuit board 7 can be mounted on the front of the bracket 1 in forward and reverse directions F, so that a button can be mounted on the front of the housing, the button triggering the buttons (including push button and touch button) on the circuit board 7, which allows for convenient operation by the operator.

[0023] The counterweight block 3, the motor 4, and the shock absorber 5 can be attached to the drive frame 2, and the drive frame 2 and the bracket 1 can be elastically connected via the elastic section 24. The vibration generated by the motor 4 during operation can cause the frame body 26 to oscillate or vibrate relative to the bracket 1, and then the oscillation or vibration is transmitted to the pin 21, so that the pin 21 drives the toothbrush head 100 to oscillate or vibrate.

[0024] The holder 1 can have a cavity 11, and the cavity 11 can be located in the upward and downward direction A at the top of the brush handle. This cavity 11 can penetrate the holder 1 along the front-back direction F and be located in the middle of the electric toothbrush in the left and right direction R.

[0025] The drive frame 2 can comprise a frame body 26 and a pin 21 extending from the frame body 26 in upward and downward directions A to the top of the electric toothbrush. The pin 21 serves to attach the toothbrush head 100, and the toothbrush head 100 is removable and replaceable and connected to the pin 21. The pin 21 can be columnar and made of metal and plastic, with the metal exhibiting high rigidity.

[0026] The frame body 26 can include a motor groove 22 in which the motor 4 is housed. In the upward and downward direction A of the electric toothbrush, the pin 21 is located at the top of the motor groove 22. The output shaft of the motor 4 can be equipped with an eccentric block 41 so that vibrations can be generated when the motor 4 rotates. In the upward and downward direction A of the electric toothbrush, the eccentric block 41 is located at the bottom of the motor 4.

[0027] The drive frame 2 and the holder 1 can be elastically connected via the elastic section 24. For example, the frame body 26 can be elastically connected to the holder 1 via the pin 21, the connecting section 25, and the elastic section 24. The frame body 26 can be located in the cavity 11, and the frame body 26 and the holder 1 are largely spaced apart from each other. For example, the frame body 26 is spaced from the holder 1 at least in the left and right directions R of the electric toothbrush, so that the frame body 26 can move relative to the holder 1. Due to the elastic connection and spacing of the drive frame 2 and the holder 1 as a whole, the toothbrush head 100 connected to the pin 21 can have a certain degree of freedom of movement, so that the toothbrush head 100 can be subjected to forces in different directions, thereby improving the cleaning of the teeth and massaging the gums.

[0028] Furthermore, the elastic section 24 as a whole is a sheet extending in the left and right direction R and in the upward and downward direction A. The size of the elastic section 24 along the forward and backward direction F of the electric toothbrush is smaller than the size of the elastic section 24 along the left and right direction R of the electric toothbrush. When the motor 4 drives the drive frame 2, the drive frame 2 can tap slightly relative to the bracket 1 along the forward and backward direction F, causing the toothbrush head 100 to tap along the forward and backward direction F. The tapping amplitude of the pin 21 along the forward and backward direction F is greater than the oscillation amplitude of the pin 21 along the left and right direction R.Then the bristles of the toothbrush head 100 tap on the tooth surface with a larger amplitude and oscillate with a smaller amplitude in a direction perpendicular to the tooth surface, so that the force exerted by the toothbrush head on the tooth surface can be increased, allowing the electric toothbrush to clean the interdental spaces and the gum line more effectively.

[0029] The size of the sheet-shaped elastic section refers here to the net size of a single elastic section 24 of the two elastic sections 24, excluding the distance between the two elastic sections 24.

[0030] The pin 21 drives the toothbrush head 100 into a back-and-forth tapping motion, allowing it to better adapt to the gum line, massage the gums, promote blood circulation, reduce the risk of bleeding gums, and gently stimulate the gums, thus improving the user's brushing experience. This tapping motion also allows the bristles to penetrate small, hard-to-reach interdental spaces more effectively, thereby enhancing cleaning performance.

[0031] It is understood that the pin 21 has a greater amplitude of movement only in the forward and backward direction F. Driven by the motor 4, the pin 21 can in fact move in several directions (e.g., forward and backward F and left and right R). This multidirectional movement allows the bristles of the toothbrush head 100 not only to cover different tooth surfaces but also to remove dirt and plaque from the interdental spaces more effectively.

[0032] The frame body 26 can include a counterweight block groove 23 in which the counterweight block 23 is housed. Optionally, the counterweight block groove 23 can be located on the underside of the motor groove 22 in the up and down direction A of the electric toothbrush, and the counterweight block 3 can be located on the underside of the eccentric block 41. Alternatively, in the up and down direction A of the electric toothbrush, the pin 21 can be located on the top of the motor groove 22 and the counterweight block groove 23 on the underside of the motor groove 22. The counterweight block 3 can increase the overall weight of the drive frame 2, compensate for vibrations generated when the motor is running, prevent vibration-induced imbalances, keep the electric toothbrush stable during use, and make the movement of the toothbrush head more stable and efficient.

[0033] The pin 21 can be connected to the elastic section 24 via the connecting section 25, the connecting section 25 being sheet-like and surrounding the pin 21. In the upward and downward direction A of the electric toothbrush, the connecting section 25 can be spaced a certain distance from the frame body 26. The connecting section 25 is connected to the holder 1 via two elastic sections 24, the elastic sections 24 being located on the front and back of the connecting section 25 in the forward and backward direction F.

[0034] Viewed in the left and right directions R of the electric toothbrush, the thickness of the connecting section 25 can be greater than the thickness of the elastic section 24. It is understood that the thickness of the connecting section 25 can be adjusted according to design requirements. The motor 4 can drive the frame body to oscillate or vibrate relative to the holder 1 via the elastic sections 24. The elastic sections 24 can absorb and cushion external forces (especially external forces in the forward and reverse directions F), such as vibrations or shocks, during use, reducing damage to the overall structure and improving service life and grip comfort.

[0035] The cross-section of the elastic section 24 (the cross-section perpendicular to the upward and downward direction A) can be rectangular, and the size of the connecting section 25 along the left and right direction R of the electric toothbrush and the elastic section 24 along the left and right direction R of the electric toothbrush can be identical (or approximately identical). One end of the elastic section 24 (the lower end in Fig. 6) can be connected to the connecting section and the other end of the elastic section 24 (the upper end in Fig. 6) can be connected to the support 1, so that the elastic section 24 and the connecting section 25 are formed in a U-shape.

[0036] At the upper end of the holder 1, a connection section for the elastic section 13 can be provided, wherein two connection sections for the elastic section 13 can be provided and the two connection sections for the elastic section 13 can be located on the front and back of the pin 21 in the forward and reverse directions F of the electric toothbrush. The elastic section 24 can be connected to the holder 1 via the connection section for the elastic section 13 and the elastic section 24 and the holder 1 are spaced apart from each other in the forward and reverse directions F.

[0037] The waterproof ring 9 can be attached to the front of the brush handle housing, the waterproof ring 9 can cover the housing opening of the brush handle, and the pin 21 can be passed through the waterproof ring 9.

[0038] For example, two sealing ring mounting holes (not shown) can be provided at the front end of the bracket 1 and two sealing ring mounting holes at the connection section for the elastic section 13. The sealing ring 8 can be fitted onto the pin 21, and the retaining claw of the sealing ring 8 can be inserted into the sealing ring mounting hole. The sealing ring 8 can prevent the ingress of water or foam into the main body 100 and can reduce the vibration acting on the waterproof ring 9, thereby improving the sealing effect.

[0039] The pivot 21 can have a pivot point. It is understood that the pivot point is a virtually defined position and not a support point present in the structure. When the motor 4 drives the drive frame 2 to oscillate or vibrate, the drive frame 2 can oscillate or vibrate around the pivot point. It is understood that the pivot point can also be movable within a certain range. For example, the amplitude near the pivot point can be controlled within 0.1 mm to 0.5 mm, which reduces the vibration resistance in the pivot point area, allowing the vibration energy of the motor 4 to be transferred more concentratedly to the elastic section 24, thus improving vibration transmission efficiency. Near the pivot point, the vibration energy is concentrated, and the effects of excessive vibration on the sealing ring 8 are reduced by the vibration absorption of the elastic section 24.At the position of the toothbrush head furthest from the pivot point, the vibration energy is released via the pin 21, the oscillation amplitude is increased and the cleaning effect is improved.

[0040] As in Fig. As shown in Figure 6, the pin 21 can extend in upward and downward directions A beyond the elastic section 24 to its uppermost end. The longer pin 21 can move the toothbrush head 100 further away from the pivot point, and the lever principle can be used to increase the amplitude of movement of the toothbrush head 100.

[0041] Optionally, in this embodiment, the elastic section 24, the connecting section 25, the frame body 26, and the bracket 1 can all be made of plastic, and the elastic section 24, the connecting section 25, the drive body, and the bracket 1 can be molded in one piece. The pin 21 is made of metal, and the pin 21 and connecting section 25 can be joined in one piece by injection molding. This reduces assembly errors and contact wear, resulting in comparatively high overall structural strength and stability of the bracket 1 and the drive frame 2.

[0042] Optionally, the shock-absorbing element 5 can be connected to the drive frame 2, with at least part of the shock-absorbing element 5 located in the space between the drive frame 2 and the holder 1. The shock-absorbing element 5 is elastic, for example, made of foam or rubber. If the drive frame oscillates or vibrates, the shock-absorbing element 5 can effectively dampen the vibrations transmitted to the U-shaped holder 1, reducing the vibration intensity transmitted to the user's hand and improving user comfort. The vibration damping provided by the shock-absorbing element 5 protects the motor 4 and other components and reduces noise during motor 4 operation, making the electric toothbrush quieter during use and improving the user experience. The shock-absorbing element 5 can also dampen external impacts, reduce damage from drops, and extend the service life of the electric toothbrush.

[0043] When using the electric toothbrush described in this application, the electric toothbrush is switched on and the power is connected, causing the motor 4 to start operating. The eccentric block 41 is driven by the motor 4 to rotate, causing the frame body to oscillate or vibrate around the pivot point to transmit force to the pin 21. The frame body and the toothbrush head are located at opposite ends of the pivot point. The lever principle amplifies the oscillation or vibration of the frame body at the bristle position of the toothbrush head. The amplitude of movement of the brush head attached to the pin 21 can reach 3 to 5 mm, thus improving the cleaning effect.

[0044] The electric toothbrush described in this application offers the following beneficial effects: (1) Since the size of the elastic section 24 in the forward and backward direction F is smaller than the size of the elastic section 24 in the left and right direction R, the tapping amplitude of the pin 21 in the forward and backward direction F is greater than the oscillation amplitude of the pin 21 in the left and right direction R, causing the bristles of the toothbrush head 100 to tap on the tooth surface with a greater amplitude, which more effectively cleans the spaces between the teeth and gum line, massages the gums, promotes blood circulation and improves the user's brushing experience. (2) The motor 4 drives the drive frame 2 to oscillate and vibrate relative to the holder 1, thereby driving the pivot element 21 to cause the toothbrush head to oscillate or vibrate synchronously. This design effectively reduces the vibrations transmitted to the brush handle, thus lowering energy consumption and improving cleaning performance. The design is simple, and the rotary motion of the motor 4 can be easily converted into oscillation or vibration of the pivot 21, keeping production costs low. (3) The vibration is transmitted to the pin 21 via the elastic section 24, thereby achieving an amplitude difference along the vibration transmission path. The amplitude is low near the pivot point, so that the sealing ring 8 is not excessively compressed and deformed by the pin 21, thus improving the sealing effect. Furthermore, the amplitude is large at the upper end of the pin 21, thereby increasing the cleaning performance of the brush head. (4) The pin 21, the elastic section 24, the connecting section 25 and the bracket 1 are formed in one piece, which results in high overall structural strength of the bracket 1 and the drive frame 2 and good stability, avoiding loose connections and reduced vibration transmission efficiency due to long-term vibrations. (5) The elastic section 24 absorbs and dampens the vibrations of the drive frame 2, so that the vibrations are transmitted less strongly to the handle and thus to the user's hand, which reduces the vibration intensity transmitted to the user's hand, improves user comfort and reduces noise, making the electric toothbrush quieter during use and improving the user experience. (6) The elastic section 24 has a simple structure and is easy to manufacture and assemble due to its one-piece design, and the production costs are low.

[0045] It should be understood that at least some aspects or features of the above-mentioned embodiments, exemplary embodiments and examples can be combined accordingly.

[0046] It is understood that in the present application, unless the number of parts or components is specifically limited, it may be one or more, where the multiple refers to two or more. If the number of parts or components shown in the figures and / or described in the description is a specific number such as two, three, four, etc., this specific number is generally exemplary and not limiting and may be understood as a multiple, i.e., two or more. However, this does not mean that the present application excludes the case of one part or component.

[0047] In this application, unless expressly stated or limited otherwise, terms such as "install," "mount," "assemble," "connect," "connect," "couple," "link," "concern," "network," "communicate," "conduct," "fix," "fasten," etc., are to be understood in a broad sense; they may, for example, be meant directly or indirectly. For instance, a connection may be a permanent connection, a detachable connection, or a connection in one piece; it may be a mechanical connection or an electrical connection; it may be a direct connection, an indirect connection via an intermediate medium, a connection within the two elements, or an interaction relationship between the two elements, unless expressly stated or limited otherwise.For example, the communication / conduit may be direct or indirect via an intermediary medium. For general technical personnel in this field, the specific meaning of the above terms in this application may be understood according to the specific circumstances.

[0048] Unless expressly stated otherwise or limited, in the present application a component that is arranged / installed / located / housed / placed in another component may fulfill one of the following two situations: Part or most of the component is located in the other component; and the component is entirely housed in the other component.

[0049] Although the present application is described in detail with reference to the embodiments mentioned above, it is obvious to those skilled in the art that the present application is not limited to the embodiments described in this description. The present application can be modified and implemented as a modified embodiment without deviating from the subject matter and scope of the present application as defined in the claims. Therefore, the information in this description serves only as an example and has no limiting effect on the present application.

Claims

[1] An electric toothbrush, characterized by that it includes the following: a bracket, wherein the bracket is provided with a hollow section; a drive frame, wherein the drive frame comprises a frame body and a pin extending from the frame body to the top of the electric toothbrush, wherein the drive frame and the holder are elastically connected by an elastic section, the frame body is located in the hollow section, the frame body and the holder are largely spaced apart from each other, and the pin is designed to connect a toothbrush head; and a drive element, wherein the drive element is arranged on the frame body and the drive element can drive the drive frame to oscillate or vibrate relative to the holder during operation, so that the pin can drive the toothbrush head to oscillate or vibrate, wherein the size of the elastic section along the forward and backward direction of the electric toothbrush is smaller than the size of the elastic section along the left and right direction of the electric toothbrush, such that the oscillation amplitude of the pin along the forward and backward direction is larger than the oscillation amplitude of the pin along the left and right direction. [2] Electric toothbrush according to claim 1, characterized by , that the drive frame is connected to the holder via the connecting section and the elastic section, wherein the connecting section is arranged around the pin, and the connecting section and the frame body are spaced apart from each other in the upward and downward direction of the electric toothbrush. [3] Electric toothbrush according to claim 2, characterized by, that one end of the elastic section is connected to the connecting section and the other end of the elastic section is connected to the support, so that the elastic section and the connecting section are formed in a U-shape. [4] Electric toothbrush according to claim 2, characterized by that the pin and connecting section are joined together in one piece by injection molding. [5] Electric toothbrush according to claim 2, characterized by , that the elastic section is a sheet extending along the left and right directions as well as along the upward and downward directions of the electric toothbrush, and that the size of the connecting section along the left and right directions of the electric toothbrush is identical to the size of the elastic section along the left and right directions of the electric toothbrush. [6] Electric toothbrush according to claim 1, characterized by, that the electric toothbrush further comprises a circuit board, the circuit board being located at the front of the holder in the forward and reverse directions. [7] Electric toothbrush according to claim 1, characterized by , that a connecting section for the elastic section is provided at the upper end of the holder, wherein the connecting section for the elastic section is located on both sides of the electric toothbrush in the forward and backward direction, and the elastic section is connected to the holder via this connecting section for the elastic section, wherein the elastic section and the holder are spaced apart from each other in the forward and backward direction. [8] Electric toothbrush according to claim 1, characterized by , that the pin extends in the upward and downward direction of the electric toothbrush over the uppermost end of the elastic section [9] Electric toothbrush according to claim 1, characterized by, that the output shaft of the drive element is connected to an eccentric block and the drive frame is equipped with a counterweight block, wherein the drive element drives the eccentric block to rotate so that the drive frame can be set into oscillations or vibrations, wherein the eccentric block is located on the underside of the drive element in the upward and downward direction of the electric toothbrush and the counterweight block is also located on the underside of the eccentric block. [10] Electric toothbrush according to claim 1, characterized by that the holder is equipped with a battery slot for inserting a battery.

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