Signal jammer

Abstract

The embodiment of the utility model discloses a signal jammer which is used for shielding recording. The embodiment of the utility model comprises a shell; the interference generator is mounted on the shell, and the interference generator is used for transmitting an interference signal for interfering a microphone of the mobile equipment; the main control board is mounted in the shell, and the main control board is electrically connected with the interference generator; and the connection interface is installed on the shell, and the connection interface is used for being connected with a charging interface of the mobile equipment.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the field of signal processing, in particular to a signal jammer for recording shielding. BACKGROUND

[0002] With the continuous development of science and technology, people's living and production level is also rising. In life, in order to deal with illegal personnel malicious recording of mobile devices to obtain some illegal interests, people need to record shielding operation on mobile devices to achieve the purpose of preventing leakage.

[0003] However, in the traditional scheme, the mobile device usually needs to be stored in a recording shielding device, and then the recording shielding device is started to realize the recording shielding function. The recording shielding effect of this scheme is still difficult to meet the requirements. CONTENT OF THE UTILITY MODEL

[0004] Embodiments of the present application provide a signal jammer for recording shielding.

[0005] The first aspect of the embodiments of the present application provides a signal jammer, which comprises:

[0006] a shell;

[0007] an interference generator installed in the shell, the interference generator being configured to emit an interference signal capable of interfering with a sound receiving device of a mobile device;

[0008] a main control board installed in the shell, the main control board being electrically connected with the interference generator; and

[0009] a connection interface installed in the shell, the connection interface being configured to be connected with a charging interface of the mobile device.

[0010] Optionally, the connection interface is electrically connected with the main control board, and the connection interface is configured to be electrically connected with the charging interface of the mobile device.

[0011] Optionally, the shell is provided with a through hole, and the through hole and the connection interface are located on a first side of the shell.

[0012] Optionally, the interference generator has a transmitting end, the transmitting end of the interference generator faces a second side of the shell, a reflection space is formed between the second side and the transmitting end of the interference generator, the reflection space is in communication with the through hole, and the first side and the second side of the shell are not parallel.

[0013] Optionally, the shell comprises a shell body and a cover plate, the first side is a side of the shell body; the shell body is connected with the cover plate, the shell body is internally provided with an interference accommodating groove and a board accommodating groove, the interference generator is arranged in the interference accommodating groove, and the main control board is arranged in the board accommodating groove; the interference accommodating groove is in communication with the through hole.

[0014] Optionally, the shell body is provided with a partition part for partitioning the interference accommodating groove and the board accommodating groove; when the shell body is connected with the cover plate, an end of the partition part towards the cover plate is in abutment with the cover plate.

[0015] Optionally, an edge of the shell body towards the cover plate is provided with a notch in a direction away from the cover plate, the cover plate is provided with a matching part in a direction towards the shell body; when the shell body and the cover plate are connected, an end of the matching part forms a first hollow opening with the notch, the first hollow opening is in communication with the board accommodating groove, and the connection interface extends from the inside of the shell to the outside of the shell through the first hollow opening.

[0016] Optionally, the connection interface is fixed to a side edge of the main control board.

[0017] Optionally, the main control board comprises a power supply circuit and an interference driving circuit, and the power supply circuit is electrically connected with the connection interface and the interference driving circuit respectively; the interference driving circuit is electrically connected with the interference generator; and the power supply circuit is used for supplying power to the interference driving circuit by using the electric energy transmitted by the mobile device through the connection interface.

[0018] Optionally, the signal jammer further comprises a switch, the switch is electrically connected with the main control board, the shell is provided with a second hollow opening, and the switch extends out of the shell through the second hollow opening.

[0019] Optionally, the connection interface is of a type-C type or a lighting type.

[0020] Optionally, the interference generator is an ultrasonic probe.

[0021] From the above technical solutions, it can be seen that the embodiments of the present application have the following advantages:

[0022] The signal jammer of the embodiments of the present application can be connected to a mobile device through a connection interface to emit an interference signal at a close range through an interference generator, so as to interfere with the sound receiving device of the mobile device. Since the transmission path of the interference signal is short, the loss of the interference signal can be reduced, so that a better sound recording shielding effect can be achieved. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1A module schematic diagram of one embodiment of a signal jammer disclosed in the present application;

[0024] Figure 2 A schematic diagram of another embodiment of a signal jammer disclosed in the present application connected to a mobile device;

[0025] Figure 3 A whole structure diagram of one embodiment of a signal jammer disclosed in the present application;

[0026] Figure 4 A signal jammer disclosed in the present application Figure 3 A cross-sectional view corresponding to A-A in the above figure;

[0027] Figure 5 A signal jammer disclosed in the present application Figure 3 An exploded schematic diagram of the signal jammer in the above embodiment. DETAILED DESCRIPTION

[0028] The present application will be further described in detail below with reference to the accompanying drawings.

[0029] Embodiments of the present application provide a signal jammer for recording shielding.

[0030] In order to prevent illegal personnel from recording on a mobile device and causing information leakage, the mobile device needs to be recorded shielded. However, in the conventional scheme, the protected mobile device needs to be stored in a recording shielding device, and then the recording shielding device is made to work to achieve recording shielding. The recording shielding effect of this scheme is still difficult to meet the requirements. In order to solve the above problems, embodiments of the present application provide a signal jammer, which is provided with a connection interface, can be connected to a mobile device, and uses an interference generator to interfere with the sound receiving device of the mobile device at a close distance to achieve recording shielding. In this way, the recording shielding effect is better and the operation is convenient.

[0031] In order to make the personnel in the technical field better understand the present application scheme, the technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the personnel in the field without creative labor should belong to the scope of protection of the present application.

[0032] The terms "first", "second", "third", "fourth" and the like in the description and in the claims of the present document, as well as above-mentioned drawings, are used for distinguishing between similar objects and not necessarily for describing a specific sequential or chronological order. It is to be understood that the use of these terms here does not imply a fixed order among the objects, but rather that the objects can be interchanged. It is further understood that whenever a term is used in the singular herein, it is also used in the plural and vice versa, unless otherwise expressly specifically defined herein. The terms "comprises", "comprising", "includes", "including" and the like are to be read as meaning "consisting of" or "consisting essentially of" unless otherwise indicated by the context.

[0033] A signal jammer 100 according to the present application is described below. Figure 1 and Figure 2 An embodiment of the signal jammer 100 according to the present application comprises the following.

[0034] A housing 1 as a carrier for installing various structures.

[0035] An interference generator 3 installed in the housing 1, the interference generator 3 is used to emit interference signals capable of interfering with the sound receiving device of the mobile device 200. Specifically, the interference generator 3 can be installed inside the housing 1, or can be installed outside the housing 1, and the specific place is not limited here. The sound receiving device is a device that can receive external sound, for example, a microphone.

[0036] A main control board 4 installed in the housing 1, the main control board 4 is electrically connected with the interference generator 3. Specifically, the main control board 4 is used to control the interference generator 3.

[0037] A connection interface 5 installed in the housing 1, the connection interface 5 is used to connect with the charging interface of the mobile device 200. Among them, the connection interface 5 can play the role of fixed installation, that is, when the connection interface 5 of the signal jammer 100 is connected with the charging interface of the mobile device 200, the signal jammer 100 can be installed on the mobile device. The specific structure of the connection interface 5 can be adapted to the charging interface, and the embodiment is not limited.

[0038] The working principle of the present embodiment is described. When the mobile device 200 needs to be recorded and shielded, the connection interface 5 of the signal jammer 100 is connected with the charging interface of the mobile device 200, and then the main control board 4 controls the interference generator 3 to emit interference signals to achieve recording and shielding.

[0039] In the embodiment of the present application, the signal jammer 100 is connected to the mobile device 200 through the connection interface 5, so that the signal jammer 100 can interfere with the sound receiving device of the mobile device 200 at a close distance. Since the transmission path of the interference signal is short, the propagation loss of the interference signal can be reduced, thereby achieving a better sound recording shielding effect. Moreover, the signal jammer 100 of the embodiment of the present application does not need to limit the placement area of the mobile device 200 when achieving sound recording shielding, that is, as long as the signal jammer 100 is installed on the mobile device 200, the mobile device 200 is not affected whether it is stationary or carried by the user. Therefore, the signal jammer 100 provided in the embodiment does not affect the normal use of the mobile device 200 by the user except for the sound recording function, and the use experience can be improved.

[0040] The signal jammer 100 of the embodiment of the present application can be powered by the mobile device 200 or can have a self-contained power supply, which is not limited here. The following is described by taking the power supply by the mobile device 200. The interference generator 3 of the signal jammer 100 can be arranged inside the housing 1 or outside the housing 1 and directly opposite the sound receiving device of the mobile device 200, as long as it can shield the sound recording of the sound receiving device of the mobile device 200, which is not limited here. The following is described by taking the interference generator 3 arranged inside the housing 1. Please refer to Figures 2 to 5 Another embodiment of the signal jammer 100 of the present application includes the following.

[0041] The housing 1 serves as a carrier for installation and can protect the internal devices. The shape of the housing 1 can be cylindrical or cuboid, or other types, which are not limited here.

[0042] The interference generator 3 is installed in the housing 1, and the interference generator 3 is used to emit an interference signal to interfere with the sound receiving device of the mobile device 200. Specifically, in an embodiment, the interference generator 3 is an ultrasonic probe. The frequency of the ultrasonic wave generated by the interference generator 3 can be set according to actual needs, which is not limited here. For example, 32 kHz to 34 kHz.

[0043] The main control board 4 is installed in the housing 1, and the main control board 4 is electrically connected with the interference generator 3. Specifically, the main control board 4 is used to control the interference generator 3.

[0044] A connection interface 5 is mounted on the shell 1, and the connection interface 5 is used to connect with the charging interface of the mobile device 200. Specifically, the connection interface 5 is of type-C type, and can also be of lighting type, or other types, which are not limited here. The type of the connection interface 5 needs to be adapted to the charging interface of the mobile device 200, that is, if the charging interface of the mobile device 200 is of type-C type, the type of the connection interface 5 is also of type-C type. The following is an example of type-C type.

[0045] In this embodiment, the pins of the connection interface 5 are set based on the type-C protocol, and the CC pin of the connection interface 5 is connected with a grounded pull-down resistor.

[0046] In one embodiment, the connection interface 5 is electrically connected with the main control board 4, and the connection interface 5 is used to electrically connect with the charging interface of the mobile device 200. Specifically, the mobile device 200 is connected with the signal jammer 100, that is, the connection interface 5 is connected with the charging interface of the mobile device 200 in structure, and at this time, the connection interface 5 and the charging interface of the mobile device 200 also establish electrical connection. In this embodiment, the signal jammer 100 can play the role of UFP (Upstream Facing Port), and the mobile device 200 can play the role of DFP (Downstream Facing Port). When the signal jammer 100 is inserted into the mobile device 200, according to the Type C Spec protocol, the mobile device 200 recognizes that the signal jammer 100 has a pull-down resistor to ground through the CC line, and then establishes connection with the signal jammer 100, and at this time, the mobile device 200 outputs a 5V voltage. The 5V voltage can be input into the signal jammer 100 through the connection interface 5 to power the signal jammer 100.

[0047] In one embodiment, please refer to Figure 5 The shell 1 is provided with a through hole 14, and the through hole 14 is located on the first side 111 of the shell 1 together with the connection interface 5. The interference signal can be diffused out of the shell 1 through the through hole 14. Specifically, the first side 111 is the side of the signal jammer 100 facing the mobile device 200 when the signal jammer 100 is connected with the mobile device 200. The relative position relationship between the through hole 14 and the connection interface 5 can be the same as the relative position relationship between the charging interface on the mobile device 200 and the receiving device. For example, if the connection interface 5 is of type-C type, the through hole 14 is located on the first side 111 of the shell 1 together with the CC pin of the connection interface 5. Figure 2As shown in the view, if the sound receiving device of the mobile device 200 is located at the left side of the charging interface, the through hole 14 on the signal interferer 100 is also located at the left side of the connecting interface 5. Thus, when the mobile device 200 and the signal interferer 100 are connected, the through hole 14 can be just aligned with the sound receiving device of the mobile device 200, so that the interference signal can be directly input to the sound receiving device of the mobile device 200, the transmission path of the interference signal is shortened, and the loss of the interference signal entering the sound receiving device is reduced. In addition, since the loss of the interference signal is reduced, the interference generator 3 does not need to send a high-power interference signal to achieve the recording shielding effect, so that a better recording shielding effect can be achieved with a lower-power interference signal.

[0048] In one embodiment, as shown in Figure 4 , Figure 5 The interference generator 3 has a transmitting end 31, the transmitting end 31 of the interference generator 3 faces the second side 121 of the shell 1, a reflection space 2 is formed between the second side 121 and the transmitting end 31 of the interference generator 3, and the reflection space 2 is in communication with the through hole 14. The first side 111 and the second side 121 of the shell 1 are not parallel.

[0049] The transmitting end 31 of the interference generator 3 emits the interference signal. The reflection space can reflect the interference signal to change the propagation path of the interference signal. The reflection space 2 is in communication with the through hole 14, so that the interference signal can propagate from the reflection space 2 to the through hole 14. The first side 111 and the second side 121 may, for example, form an angle or be perpendicular to each other.

[0050] Although the first side 111 of the shell 1 directly faces the mobile device 200, since the area of the transmitting end 31 of the interference generator 3 is usually large, if the transmitting end 31 of the interference generator 3 directly faces the first side 111 of the shell 1, the thickness t1 (as shown in Figure 4 ) of the shell 1 will be thick, so it is not convenient to install the signal interferer 100 on the mobile device 200. In this embodiment, the transmitting end 31 of the interference generator 3 does not directly face the first side 111 of the shell 1, but faces the second side 121 of the shell 1. Thus, after the interference signal is emitted from the transmitting end 31, it propagates in the reflection space 2, is reflected when it propagates to the second side 121 of the shell 1, and finally is reflected to the through hole 14 of the first side 111 of the shell 1, so as to act on the sound receiving device of the mobile device 200 to achieve interference. In this embodiment, since the transmitting end 31 of the interference generator 3 is not arranged to face the first side 111 of the shell 1, the thickness of the signal interferer 100 can be reduced, so that the signal interferer 100 is more convenient to install on the mobile device 200.

[0051] Specifically, the second side surface 121 can be perpendicular to the first side surface 111. If the interference generator 3 is an ultrasonic probe, it is usually in the shape as shown in the figure, that is, the thickness t2 (as shown in the figure) of the interference generator 3 is thinner, and the area of the emitting end 31 is larger. In this embodiment, the emitting end 31 of the interference generator 3 faces the second side surface 121, and the side surface of the interference generator 3 faces the first side surface 111, by taking advantage of the feature of the interference generator 3. Since the thickness t2 of the interference generator 3 is thinner, the thickness of the entire signal interferer 100 can be further reduced. Figure 5 Figure 4 In this embodiment, the thickness of the signal interferer 100 is reduced by arranging the interference generator 3 and the main control board 4 in the length direction of the bottom of the shell 1.

[0052] In one of the embodiments, as shown in the figure, the shell 1 includes a shell body 11 and a cover plate 12, and the first side surface 111 is the side surface of the shell body 11. The shell body 11 is connected with the cover plate 12, and the shell body 11 is internally provided with an interference accommodating groove 6 and a board accommodating groove 7. The interference generator 3 is arranged in the interference accommodating groove 6, and the main control board 4 is arranged in the board accommodating groove 7. The interference accommodating groove 6 is in communication with the through hole 14. Figure 5 In this embodiment, the shell 1 is internally provided with the interference accommodating groove 6 for accommodating the interference generator 3 and the board accommodating groove 7 for accommodating the main control board 4, so as to fix the interference generator 3 and the main control board 4 in the shell 1, avoiding the problem that the interference generator 3 and the main control board 4 are not fixed and are damaged when the user carries the signal interferer 100 to move. In order to ensure that the thickness of the signal interferer 100 is thinner, the interference accommodating groove 6 and the board accommodating groove 7 can be arranged in the length direction of the bottom of the shell 1. The second side surface 121 of the shell 1 is the cover plate 12, and the interference generator 3 and the cover plate 12 form a reflection space 2, and the emitting end 31 of the interference generator 3 is aligned with the cover plate 12. The shell body 11 is internally provided with the interference accommodating groove 6 and the board accommodating groove 7, which can accommodate the interference generator 3 and the main control board 4 respectively.

[0053] In one of the embodiments, as shown in the figure, the shell body 11 is provided with a partition 8 for separating the interference accommodating groove 6 and the board accommodating groove 7. When the shell body 11 is connected with the cover plate 12, one end of the partition 8 facing the cover plate 12 abuts against the cover plate 12. Specifically, the partition 8 is the part between the interference accommodating groove 6 and the board accommodating groove 7. In this embodiment, the partition 8 can also reflect the interference signal, so that the interference signal finally goes out of the through hole 14, avoiding the problem that the interference signal leaks to the side of the board accommodating groove 7 to cause low interference efficiency.

[0054] Figure 5 In this embodiment, the partition 8 can also reflect the interference signal, so that the interference signal finally goes out of the through hole 14, avoiding the problem that the interference signal leaks to the side of the board accommodating groove 7 to cause low interference efficiency.

[0055] ​In one of the embodiments, the shell body 11 is provided with a notch 9 on the edge of the side of the shell body 11 facing the cover plate 12 in a direction away from the cover plate 12, and the cover plate 12 is provided with a matching part 10 in a direction facing the shell body 11, and when the shell body 11 and the cover plate 12 are connected, the end of the matching part 10 and the notch 9 form a first hollow opening, and the first hollow opening is in communication with the plate receiving groove 7, and the connection interface 5 extends from the inside of the shell 1 to the outside of the shell 1 through the first hollow opening.

[0056] In one of the embodiments, the notch 9 is provided in a direction away from the cover plate 12, that is, the bottom of the notch 9 extends in a direction away from the cover plate 12, and the opening end of the notch 9 is opposite to the cover plate 12. The notch 9 and the matching part 10 will be matched to form a first hollow opening, and the connection interface 5 can extend out of the first hollow opening, which is convenient for the assembly of the connection interface 5 and the first hollow opening. When assembling the signal jammer 100, for example, the connection interface 5 is placed in the position of the notch 9, and then the cover plate 12 is covered with the shell body 11, and the matching part 10 and the notch 9 can be matched to fix the connection interface 5.

[0057] In one of the embodiments, as shown in Figure 5 The connection interface 5 is fixed to the side edge of the main control board 4, which is convenient for the connection interface 5 to extend out of the notch 9.

[0058] In one of the embodiments, the main control board 4 includes a power supply circuit and a jamming drive circuit (not shown in the figure), and the power supply circuit is electrically connected with the connection interface 5 and the jamming drive circuit respectively. The power supply circuit is used to supply power to the jamming drive circuit by using the electric energy transmitted by the mobile device 200 through the connection interface 5. The jamming drive circuit is electrically connected with the jamming generator 3. The power supply circuit can convert the power source into a suitable power source for the jamming drive circuit as long as it can, and the specific circuit principle can refer to the prior art, for example, it can include a voltage conversion circuit, a voltage stabilizing circuit, etc. The jamming drive circuit can generate a drive signal as long as it can, for example, it can include a processor and a power amplification circuit, the processor generates a pulse signal, and the power amplification circuit amplifies the pulse signal to generate a drive signal. The specific principle can refer to the driving principle of the ultrasonic wave in the prior art.

[0059] In this embodiment, when the signal jammer 100 and the mobile device 200 are electrically connected, the mobile device 200 outputs a 5V voltage, and after the power supply circuit receives the voltage through the connection interface 5, the power supply circuit can supply power to the jamming drive circuit to drive the jamming generator 3 to emit a jamming signal.

[0060] In one of the embodiments, as shown in Figure 3As shown, the signal jammer 100 further comprises a switch 41 electrically connected with the main control board 4. The shell 1 is provided with a second hollow opening, and the switch 41 extends out of the shell 1 through the second hollow opening. The switch 41 is used to control the start and stop of the signal jammer 100. When the recording shielding function is not needed, the signal jammer 100 can be turned off through the switch 41 to save the power of the mobile device 200.

[0061] The working principle of the signal jammer 100 in the embodiment will be described. Figures 3 to 5 As shown, the signal jammer 100 further comprises a switch 41 electrically connected with the main control board 4. The shell 1 is provided with a second hollow opening, and the switch 41 extends out of the shell 1 through the second hollow opening. The switch 41 is used to control the start and stop of the signal jammer 100. When the recording shielding function is not needed, the signal jammer 100 can be turned off through the switch 41 to save the power of the mobile device 200.

[0062] In this embodiment, the signal jammer 100 is small and convenient, and is provided with the connection interface 5, so that the recording shielding of the mobile device 200 can be performed at any time by being plugged into the charging interface of the mobile device 200, and the normal use of the user will not be affected. At the same time, the emitting end 31 of the interference generator 3 faces the cover plate 12 and does not directly aim at the through hole 14, and the interference signal is reflected by the reflection space 2, which can also achieve the effect of recording shielding, and reduces the thickness of the signal jammer 100, facilitating carrying. In addition, the loss of the interference signal from emission to the receiving device of the mobile device 200 is low, so that a lower power consumption interference signal can achieve a better recording shielding effect.

[0063] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the system, device and unit described above can refer to the corresponding process in the foregoing embodiments, which will not be described here.

[0064] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented in other manners. For example, the described device embodiments are merely schematic. For example, the division of the units is only a logical function division. There can be another division manner for the actual implementation. For example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections can be indirect couplings or communication connections through some interfaces, devices or units, and can be in electrical, mechanical or other forms.

[0065] The units described as separated components can or can not be physically separated, and the components displayed as units can or can not be physical units, i.e., can be located in one place, or can be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purposes of the embodiments.

[0066] In addition, each functional unit in each embodiment of the present application can be integrated into a processing unit, or each unit can exist physically, or two or more units can be integrated into one unit.

[0067] The above embodiments are merely used to illustrate the technical solutions of the present application, rather than limit them. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalent ones. The modifications or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A signal jammer, characterized by, The signal jammer comprises: a shell; a jamming generator mounted in the shell, the jamming generator being configured to emit a jamming signal capable of interfering with a radio receiver of a mobile device; a main control board mounted in the shell, the main control board being electrically connected with the jamming generator; and a connection interface mounted on the shell, the connection interface being configured to connect with a charging interface of the mobile device.

2. The signal jammer of claim 1, wherein, The connection interface is electrically connected with the main control board, and the connection interface is configured to be electrically connected with the charging interface of the mobile device.

3. The signal jammer of claim 1, wherein, The shell is provided with a through hole, and the through hole and the connection interface are located on a first side of the shell.

4. The signal jammer of claim 3, wherein, The jamming generator has a transmitting end, and the transmitting end of the jamming generator faces a second side of the shell. A reflection space is formed between the second side and the transmitting end of the jamming generator, and the reflection space is in communication with the through hole. The first side and the second side of the shell are not parallel.

5. The signal jammer of claim 3, wherein, The shell comprises a shell body and a cover plate, and the first side is a side of the shell body. The shell body is connected with the cover plate, and the shell body is internally provided with a jamming accommodating groove and a board accommodating groove. The jamming generator is arranged in the jamming accommodating groove, and the main control board is arranged in the board accommodating groove. The jamming accommodating groove is in communication with the through hole.

6. The signal jammer of claim 5, wherein, The shell body is provided with a partition portion separating the jamming accommodating groove and the board accommodating groove. When the shell body is connected with the cover plate, one end of the partition portion facing the cover plate abuts against the cover plate.

7. The signal jammer of claim 5, wherein, An edge of one side of the shell body facing the cover plate is provided with a notch in a direction away from the cover plate. The cover plate is provided with a matching portion protruding in a direction facing the shell body. When the shell body and the cover plate are connected, an end portion of the matching portion forms a first hollow opening with the notch. The first hollow opening is in communication with the board accommodating groove, and the connection interface extends from the inside of the shell to the outside of the shell through the first hollow opening.

8. The signal jammer of claim 2, wherein, The connection interface is fixed to a side edge of the main control board.

9. The signal jammer of claim 1, wherein, The main control board comprises a power supply circuit and a jamming driving circuit, and the power supply circuit is electrically connected with the connection interface and the jamming driving circuit respectively. The jamming driving circuit is electrically connected with the jamming generator. The power supply circuit is configured to supply power to the jamming driving circuit by using the electric energy transmitted by the mobile device through the connection interface.

10. The signal jammer of claim 1, wherein, The signal jammer further comprises a switch electrically connected with the main control board. The shell is provided with a second hollow opening, and the switch extends out of the shell through the second hollow opening.

11. The signal jammer of claim 2, wherein, The connection interface is of a type-C type or a lighting type.

12. The signal jammer according to any one of claims 1 to 11, characterized in that, The jamming generator is an ultrasonic probe.

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