Underground metal detector

Abstract

The utility model relates to the technical field of metal detection, and discloses an underground metal detector, which comprises a handheld part and a detection disc, the handheld part and the detection disc are connected together by arranging a rod body, the bottom of the handheld part is connected with a loudspeaking assembly, the loudspeaking assembly comprises an outer shell, a circuit board is arranged in the outer shell, and the circuit board is connected with the handheld part. A controller and an audio output module are arranged on the circuit board, the controller is connected with the detection disc, and the audio output module is connected with the controller; the side wall of the outer shell is also provided with a loudspeaker; the loudspeaker is connected with the audio output module; according to the utility model, the loudspeaking assembly is arranged at the bottom of the hand-held part and is close to a user, so that the user can still hear related sound prompts even in a noisy environment, the phenomenon of missing detection is difficult to occur in detection work, and compared with the prior art, the utility model has the advantages of wide application place and stable detection capability.

Description

Technical Field

[0001] The utility model relates to an underground metal detector, belonging to the technical field of metal detection. Background Art

[0002] An underground metal detector is a device or tool used to find underground metal objects. It can be widely used in military, security inspection, archaeology, prospecting and other fields.

[0003] In the prior art, there is a utility model patent with Chinese patent authorization announcement number CN219657891U, which discloses an underground metal detector, including a search plate, a shielding device, a lifting device, and a protective component. The four sets of protective components cooperate with each other to shield and protect the search plate, and can prevent the search plate from colliding with stones and weeds on the bottom surface during search and detection to cause damage to the search plate. Then, the U-shaped seat and the connecting rod are driven to rise by means of a pneumatic telescopic rod, so that the protective component can be driven to flip upward through the universal ball and the groove ring to open, and the debris around the search plate can be cleaned and removed without hindering the detection work of the search plate, which has the advantage of protecting the search plate from being easily damaged. However, it also has the following disadvantages: during detection, it only reminds the user through the alarm sound of the probe coil, and no corresponding speaker is set. During detection, the probe coil is far away from the user, so when the detector is used in noisy places such as mines, the user may miss the metal because he does not hear the alarm sound. It has the disadvantages of limited application places and unstable detection ability. Utility Model Content

[0004] In order to solve the above problems existing in the prior art, the utility model provides an underground metal detector.

[0005] The technical solution of the utility model is as follows:

[0006] An underground metal detector comprises a handheld part and a detection plate, wherein the handheld part and the detection plate are connected together by a rod body, a speaker assembly is connected to the bottom of the handheld part, the speaker assembly comprises an outer shell, a circuit board is arranged inside the outer shell, a controller and an audio output module are arranged on the circuit board, the controller is connected to the detection plate, and the audio output module is connected to the controller; a speaker is also arranged on the side wall of the outer shell, and the speaker is connected to the audio output module.

[0007] Wherein, a volume adjustment knob is also arranged on the side wall of the outer shell, and the volume adjustment knob is connected with the audio output module.

[0008] Wherein, a control switch is also arranged on the side wall of the outer shell, and the control switch is connected with the controller.

[0009] Wherein, an earphone jack is also arranged on the side wall of the outer shell, and the earphone jack is connected with the audio output module.

[0010] Among them, a first battery compartment is opened on the top of the outer shell, and a battery placement rack is arranged inside the first battery compartment. The battery placement rack is vertically arranged in the first battery compartment, and a limiting rib and a clamping ring are arranged on one side wall of the battery placement rack. Battery springs are arranged inside the limiting rib and the clamping ring, and the battery spring arranged inside the limiting rib is completely retracted inside the limiting rib. The setting of the limiting rib satisfies that the negative terminal of the battery cannot enter the interior of the limiting rib, but the positive terminal carbon rod part of the battery can enter the interior of the limiting rib, and the height difference between the limiting rib and the corresponding battery spring satisfies that the positive terminal carbon rod part of the battery can contact the corresponding battery spring by extending into the limiting rib.

[0011] A connecting port is provided on the bottom surface of the first battery compartment, and the connecting port connects the first battery compartment with the circuit board. One end of each battery spring extends into the circuit board through the connecting port and is connected to the circuit board.

[0012] Among them, a second battery compartment is provided at the bottom of the hand-held part in a manner adapted to the first battery compartment. When the speaker assembly is connected to the hand-held part, the first battery compartment and the second battery compartment are spliced ​​together to form a cavity for placing the battery. The end of the cavity away from the rod body is arranged in an open structure. The end of the cavity open structure is covered with a battery cover. A battery contact piece is arranged on the inner side wall of the battery cover. When the battery cover is covered on the end of the cavity open structure, the battery contact piece on the inner side wall can abut against the end of the battery placed correctly in the cavity.

[0013] The utility model has the following beneficial effects:

[0014] The utility model arranges a speaker component at the bottom of the handheld part. When the detection disk detects a metal object, the detection disk can send a signal to the controller. After receiving the signal, the controller can control the audio output module to start working. The audio output module can send a prompt sound to the outside through the speaker. Since the speaker component is arranged at the handheld part, it is close to the user, so that the user can still hear the relevant sound prompt even in a noisy environment, so as to ensure that the phenomenon of missed detection is unlikely to occur during the detection work. Compared with the existing technology, the utility model has the advantages of wide application places and stable detection ability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model;

[0016] Figure 2 This is a schematic diagram of module connection of the utility model;

[0017] Figure 3 It is a structural schematic diagram of the circuit board in the utility model;

[0018] Figure 4 It is a schematic diagram of the explosion structure of the hand-held part in the utility model.

[0019] The reference numerals in the figure represent:

[0020] 1. Handheld part; 2. Detection plate; 3. Rod body; 4. Speaker assembly; 5. Outer shell; 6. Circuit board; 7. Controller; 8. Audio output module; 9. Speaker; 10. Volume adjustment knob; 11. Control switch; 12. Headphone jack; 13. First battery compartment; 14. Battery placement rack; 15. Limiting ribs; 16. Clamp ring; 17. Battery spring; 18. Connecting port; 19. Second battery compartment; 20. Cavity; 21. Battery cover. DETAILED DESCRIPTION

[0021] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Example 1: Please refer to Figures 1 to 3 The present embodiment provides an underground metal detector, including a handheld part 1 and a detection plate 2. The handheld part 1 and the detection plate 2 are connected together by setting a rod body 3. The user can move the position of the detection plate 2 by holding the handheld part 1 to perform the required detection work.

[0023] A speaker assembly 4 is connected to the bottom of the handheld part 1, and the speaker assembly 4 includes an outer shell 5. In this embodiment, the outer shell 5 can be detachably connected to the bottom of the handheld part 1 by a screw connection method commonly used in the prior art, so as to facilitate subsequent disassembly and maintenance. A circuit board 6 is arranged inside the outer shell 5, and a controller 7 and an audio output module 8 are arranged on the circuit board 6. The controller 7 is connected to the detection disk 2, and the audio output module 8 is connected to the controller 7. The controller 7 can control the working state of the audio output module 8 according to the detection information transmitted by the detection disk 2. A speaker 9 is also arranged on the side wall of the outer shell 5, and the speaker 9 is connected to the audio output module 8. When the audio output module 8 is working, it can send a sound prompt to the outside through the speaker 9.

[0024] Through the above arrangement, when performing detection work, the user moves the position of the detection disk 2 by holding the handheld part 1. When the detection disk 2 detects a metal object, the detection disk 2 can send an electrical signal to the controller 7. After receiving the electrical signal, the controller 7 can control the audio output module 8 to start working. The audio output module 8 can send a prompt sound to the outside world through the speaker 9 to inform the user or the detected position that there is metal. Since the speaker component 4 is arranged at the position of the handheld part 1, its position is close to the user, so that the user can still hear the relevant sound prompts issued by the speaker 9 even in a noisy environment, so as to ensure that it is difficult to miss the detection during the detection work.

[0025] For the convenience of users, a volume adjustment knob 10 is also provided on the side wall of the outer shell 5. The volume adjustment knob 10 is connected to the audio output module 8. By rotating the volume adjustment knob 10, the audio volume output by the audio output module 8 can be adjusted, so that the volume emitted by the speaker 9 can be adjusted, so as to facilitate the user's use and enable the user to adjust the output volume accordingly as needed.

[0026] Since the environment in some places is quiet, there is no need to rely on the prompt of the speaker component 4. In order to save power, a control switch 11 is also provided on the side wall of the outer shell 5. The control switch 11 is connected to the controller 7. The control switch 11 can control the working state of the controller 7. When the speaker component 4 is not needed, the controller 7 can be turned off by turning off the control switch 11, thereby turning off the speaker component 4.

[0027] Because the environment in some places is too noisy, even the prompt of the speaker assembly 4 may not be heard by the user. To ensure that the user can hear the prompt sound, an earphone jack 12 is further provided on the side wall of the outer shell 5, and the earphone jack 12 is connected to the audio output module 8. In a noisy environment, the user can insert an earphone into the earphone jack 12 so that the audio output by the audio output module 8 can directly enter the earphone. After that, the user can wear the earphone to obtain the prompt sound through the earphone, so as to ensure that the user can hear the relevant prompt sound even in an overly noisy environment.

[0028] When the above-mentioned detector is in use, a related power source, such as a battery, is required. When using a battery as a power source, if the battery is installed reversely, it is easy to cause a short circuit and cause the above-mentioned detector to burn out, etc., which has the problem of insufficient safety; therefore, based on the first embodiment, the second embodiment is proposed.

[0029] Example 2: Please refer to Figures 1 to 4, the present embodiment provides an underground metal detector, including all the structures in the first embodiment. Furthermore, a first battery compartment 13 is opened on the top of the outer shell 5, and a battery placement rack 14 is arranged inside the first battery compartment 13. The battery placement rack 14 is vertically arranged in the first battery compartment 13, and a limiting rib 15 and a clamping ring 16 are arranged on the front side wall of the battery placement rack 14. The setting position of the limiting rib 15 corresponds to the positive terminal of the battery, and the setting position of the clamping ring 16 corresponds to the negative terminal of the battery. Battery springs 17 are arranged inside the limiting rib 15 and the clamping ring 16, wherein the battery spring 17 arranged inside the limiting rib 15 is completely retracted inside the limiting rib 15, so that the negative terminal of the battery cannot contact the battery spring 17 at this position when it does not enter the limiting rib 15, and the battery spring 17 arranged inside the clamping ring 16 is extended outward from the clamping ring 16 to facilitate the connection of the negative terminal of the battery.

[0030] In order to avoid the short circuit problem caused by reverse installation of the battery, the limiting rib 15 is set to ensure that the negative terminal of the battery cannot enter the inside of the limiting rib 15. The outline of the limiting rib 15 can be smaller than the cross-section of the negative terminal of the battery, so that the negative terminal of the battery cannot enter the inside of the limiting rib 15. In the prior art, the positive terminal of a common battery is provided with a raised carbon rod portion, and the diameter of the raised carbon rod portion is smaller than the diameter of the negative terminal of the battery. In order to allow the positive terminal of the battery to contact and conduct with the battery spring 17 inside the limiting rib 15, the setting of the limiting rib 15 also satisfies the requirement that the carbon rod part of the positive terminal of the battery can enter the interior of the limiting rib 15, that is, the outline of the limiting rib 15 can be larger than the cross-section of the carbon rod part of the positive terminal of the battery, so that the carbon rod part of the positive terminal of the battery can enter the interior of the limiting rib 15. At the same time, the height difference between the limiting rib 15 and the corresponding battery spring 17 satisfies the requirement that the carbon rod part of the positive terminal of the battery can contact with the corresponding battery spring 17 by extending into the limiting rib 15, thereby achieving conduction.

[0031] A connecting port 18 is provided on the bottom surface of the first battery compartment 13, and the connecting port 18 connects the first battery compartment 13 with the circuit board 6. One side end of each battery spring 17 extends into the circuit board 6 through the connecting port 18 and is connected to the circuit board 6, providing a basis for subsequent batteries to power the circuit board 6.

[0032] A second battery compartment 19 is provided at the bottom of the handheld portion 1 in a manner adapted to the first battery compartment 13. When the speaker assembly 4 is connected to the handheld portion 1, the first battery compartment 13 and the second battery compartment 19 are spliced ​​together to form a cavity 20 for placing batteries. The end of the cavity 20 away from the rod body 3 is arranged in an open structure. The end of the open structure of the cavity 20 is covered with a battery cover 21. The battery cover 21 can be detachably connected to the handle portion by a screw connection method commonly used in the prior art. A battery contact piece is provided on the inner side wall of the battery cover 21. When the battery cover 21 is covered on the end of the open structure of the cavity 20, the battery contact piece on the inner side wall can abut against the end of the battery placed correctly in the cavity 20, so as to limit the battery in the cavity 20 and realize conduction between the positive and negative poles at the corresponding positions of the two batteries.

[0033] According to the above arrangement, when installing the battery, the battery cover 21 is removed from the handheld part 1, and then the battery is placed on the battery placement rack 14 in the cavity 20. When the battery position is correct, the positive terminal carbon rod portion of the battery located at the positive position extends into the limiting rib 15 and contacts the battery spring 17 located in the limiting rib 15, and the negative terminal of the battery located at the negative position contacts the battery spring 17 located in the clamp ring 16, and then the battery cover 21 is covered. When the battery position is wrong, at this time, the negative terminal of the battery located at the positive position is set toward the limiting rib 15, and it cannot contact the battery spring 17 located inside the limiting rib 15 through the limiting rib 15, so that the circuit cannot be connected at this time. At the same time, when the battery cannot reach the correct installation position, the battery cover 21 cannot be covered, so as to remind the user that there is an installation error and it should be corrected in time, thereby avoiding the occurrence of reverse installation of the battery.

[0034] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An underground metal detector, comprising a handheld part (1) and a detection plate (2), wherein the handheld part (1) and the detection plate (2) are connected together by a rod (3), characterized in that: The bottom of the handheld part (1) is connected to a speaker assembly (4), the speaker assembly (4) comprises an outer shell (5), a circuit board (6) is arranged inside the outer shell (5), a controller (7) and an audio output module (8) are arranged on the circuit board (6), the controller (7) is connected to the detection plate (2), and the audio output module (8) is connected to the controller (7); a speaker (9) is also arranged on the side wall of the outer shell (5), and the speaker (9) is connected to the audio output module (8).

2. An underground metal detector according to claim 1, characterized in that: A volume adjustment knob (10) is also provided on the side wall of the outer shell (5), and the volume adjustment knob (10) is connected to the audio output module (8).

3. An underground metal detector according to claim 2, characterized in that: A control switch (11) is also provided on the side wall of the outer shell (5), and the control switch (11) is connected to the controller (7).

4. An underground metal detector according to claim 2, characterized in that: An earphone jack (12) is also provided on the side wall of the outer shell (5), and the earphone jack (12) is connected to the audio output module (8).

5. An underground metal detector according to claim 1, characterized in that: The top of the outer shell (5) is provided with a first battery compartment (13), a battery placement rack (14) is arranged inside the first battery compartment (13), the battery placement rack (14) is arranged vertically inside the first battery compartment (13), a limiting rib (15) and a clamping ring (16) are arranged on one side wall of the battery placement rack (14), and a battery spring (17) is arranged inside the limiting rib (15) and the clamping ring (16), wherein the battery spring (17) arranged inside the limiting rib (15) The battery spring (17) is completely retracted inside the limiting rib (15), and the limiting rib (15) is arranged so that the negative terminal of the battery cannot enter the inside of the limiting rib (15), but the carbon rod part of the positive terminal of the battery can enter the inside of the limiting rib (15), and the height difference between the limiting rib (15) and the corresponding battery spring (17) is such that the carbon rod part of the positive terminal of the battery can contact the corresponding battery spring (17) by extending into the limiting rib (15).

6. An underground metal detector according to claim 5, characterized in that: A connecting port (18) is provided on the bottom surface of the first battery compartment (13), the connecting port (18) connecting the first battery compartment (13) with the circuit board (6), and one end portion of each battery spring (17) extends into the circuit board (6) through the connecting port (18) and is connected to the circuit board (6).

7. An underground metal detector according to claim 5, characterized in that: The bottom of the handheld part (1) is provided with a second battery compartment (19) which is adapted to the first battery compartment (13). When the speaker assembly (4) is connected to the handheld part (1), the first battery compartment (13) and the second battery compartment (19) are spliced ​​together to form a cavity (20) for placing batteries. The end of the cavity (20) away from the rod body (3) is arranged in an open structure. The end of the open structure of the cavity (20) is covered with a battery cover (21). The inner side wall of the battery cover (21) is provided with a battery contact piece. When the battery cover (21) is covered on the end of the open structure of the cavity (20), the battery contact piece on the inner side wall can abut against the end of a battery placed correctly in the cavity (20).

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