A fish finder with a retractable float structure and a base thereof
By introducing a retractable float structure and base design into the fish finder, the positioning error and stability problems of existing fish finders are solved, enabling precise positioning and multi-layer detection of fish schools, and making it suitable for different aquatic environments.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN SAIDA INTELLIGENT TECHNOLOGY CO LTD
- Filing Date
- 2025-09-04
- Publication Date
- 2026-07-21
AI Technical Summary
Existing visual fish finders lack independent float components, leading to positioning errors. They are also prone to drifting or capsizing in flowing water, making them ineffective at detecting surface and mid-water fish.
The design incorporates a fish finder with a retractable float structure and its base. The float serves as a water surface marker, vertically aligned with the camera, while the base acts as a gravity anchor point, enabling precise camera positioning and improved stability.
It reduces the positioning error of the fish finder, reduces the operation time for finding fish schools and nests, improves stability in complex water flow environments, and can effectively detect fish schools in the bottom, middle and surface layers.
Smart Images

Figure CN224522153U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of fish finder technology, and in particular to a fish finder with a retractable float structure and its base. Background Technology
[0002] Currently, since fish cannot be seen by the human eye, fish finders are commonly used to locate fish in the water to enhance the enjoyment and efficiency of fishing. Fish finders are mainly divided into two categories: 1. Sonar type: These use sound wave reflection to detect water depth, fish distribution, and underwater structures, with a detection range of 50-65 meters, meeting the needs of unfamiliar waters or professional anglers. 2. Visual type: These fish finders are equipped with high-definition cameras to directly observe underwater fish activity, suitable for night fishing, murky water environments, or practice fishing for beginners.
[0003] Current visual fish finders have the following technical problems:
[0004] 1. In the existing technology, fish finders usually adopt an integrated structure without an independent float component. Users cannot determine the precise location of the underwater camera by water surface markers, resulting in positioning errors.
[0005] 2. In existing technologies, fish finders are typically deployed directly into the water without an independent base as a gravity anchor. In flowing water, the device is prone to drifting or tipping over, causing the camera to lose focus. Moreover, traditional fish finders have a fixed structure, and traditional bottom-mounted detectors can only detect fish at the bottom, leaving blind spots for surface and mid-level fish.
[0006] Therefore, there is a need for a fish finder with a retractable float structure and its base that can solve the above problems. Utility Model Content
[0007] The purpose of this invention is to provide a fish finder with a retractable float structure and its base. This invention, through the innovative design of the retractable float component, completely solves the problem of traditional integrated fish finders being unable to locate the camera in real time. The float ball, as a visible marker on the water surface, is vertically aligned with the camera via the float line. Users can directly observe the position of the float ball to determine the precise location of the underwater camera, making it particularly suitable for murky waters or muddy bottom environments. Furthermore, the float ball can also serve as a reference point for baiting (groundbaiting). Compared to existing integrated structures, this design reduces the positioning error of the fish finder and decreases the time spent repeatedly casting hooks to search for fish schools and baiting spots.
[0008] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a fish finder with a retractable float structure, including a fish finder body and a float assembly; the fish finder body includes a waterproof shell, side cover plate A, side cover plate B and a camera, the camera is installed inside the waterproof shell, the float assembly includes a float ball, a reel and a drive motor, a reel compartment is provided inside the waterproof shell, the reel is installed in the reel compartment, the drive motor is located on one side of the reel, the output end of the drive motor is connected to the reel through a motor shaft, a float line is wound on the reel, the float ball and the float line are connected to each other, the drive motor is used to drive the reel to retract the float line, thereby realizing the extension and retraction of the float ball.
[0009] Furthermore, the reel compartment is provided with a reel compartment cover, which is fastened to the waterproof outer shell. A through hole is provided on the reel compartment cover, through which one end of the float line passes and is connected to the float ball.
[0010] Furthermore, the waterproof outer shell is provided with a finger-loop groove, which is located below the reel compartment cover.
[0011] Furthermore, the waterproof outer casing has screw holes for connecting to the base.
[0012] Furthermore, limit blocks are installed on the left and right sides of the drive motor, and the drive motor is fixed inside the waterproof housing by the limit blocks.
[0013] Furthermore, the side cover plate A and the side cover plate B are respectively connected to the left and right sides of the waterproof shell. The side cover plate A and the side cover plate B are sealed with the waterproof shell by waterproof adhesive. A cable outlet hole is provided on the side cover plate A, and the cable outlet hole is sealed with the signal transmission cable by waterproof adhesive.
[0014] Furthermore, a waterproof partition is provided inside the reel compartment to divide the waterproof outer shell into a waterproof area and a non-waterproof area.
[0015] A fish finder base with a retractable float structure is provided. The fish finder with a retractable float structure is installed on the base. The base includes a base plate and support arms. Two support arms are fixedly connected to the base plate. Tight screws are installed on the support arms. The tight screws are screwed into the screw holes of the waterproof shell to adjust the position and posture of the fish finder body so that the fish finder body is placed flat or vertically, or screwed into the U-shaped plate.
[0016] Furthermore, the base plate has a receiving groove for placing the signal transmission cable, and a wire hole is provided in the receiving groove. One end of the signal transmission cable passes through the wire hole and is connected to the fish finder body, and the other end of the signal transmission cable is connected to the remote control. The remote control is connected to the display through a connecting cable.
[0017] Furthermore, the signal transmission cable is sheathed with a limiting silicone tube.
[0018] The advantages of this utility model are:
[0019] 1. This utility model, through its innovative design of a retractable float assembly, completely solves the problem of traditional integrated fish finders being unable to locate the camera in real time. The float ball, as a visible marker on the water surface, is vertically aligned with the camera via the float line. Users can directly observe the position of the float ball to determine the precise location of the underwater camera, making it particularly suitable for murky waters or muddy bottom environments. Furthermore, the float ball can also serve as a reference point for baiting (groundbaiting). Compared to existing integrated structures, this design reduces the positioning error of the fish finder and decreases the time spent repeatedly casting hooks to search for fish schools and baiting spots.
[0020] 2. This utility model also discloses a fish finder base with a retractable float structure. Through the collaborative innovative design of the base and the fish finder body, it completely solves the problems of poor stability and fixed viewing angle of traditional fish finders in complex water flow environments. The base acts as a gravity anchor point, and the fish finder body can be tightened and fixed by the support arm on the base plate and the hand-tightened screw. This allows for attitude adjustment of the fish finder body before it is submerged, enabling the camera to be placed horizontally, vertically, or suspended. Horizontal placement can directly cover the riverbed and muddy bottom areas, suitable for detecting bottom-dwelling fish. Vertical or suspended placement can detect surface and mid-water fish schools. The receiving groove and cable passage hole on the base plate provide a directional channel for the signal transmission cable, preventing the cable from becoming tangled or washed away by the water flow. Attached Figure Description
[0021] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0022] Figure 1 This is a three-dimensional structural diagram of the present invention.
[0023] Figure 2 This is an enlarged structural diagram of the fish finder housing in this utility model. Figure 1 .
[0024] Figure 3 This is an enlarged structural diagram of the fish finder housing in this utility model. Figure 2 .
[0025] Figure 4 This is an enlarged structural diagram of the base in this utility model.
[0026] Figure 5 This is a schematic diagram of the assembly structure between the float assembly and the fish finder housing in this utility model.
[0027] Figure 6 This is an enlarged structural schematic diagram of the float assembly in this utility model.
[0028] Figure 7 This is a schematic diagram of a vertical fish finder.
[0029] Figure 8 This is a schematic diagram of a suspended fish finder.
[0030] Figure 9 This is a circuit block diagram of the present invention.
[0031] in:
[0032] 1. Fish finder body; 101. Waterproof outer shell; 102. Side cover A;
[0033] 1021. Cable exit hole; 103. Screw hole; 104. Finger groove;
[0034] 105. Wire wheel bay cover; 1051. Through hole; 106. Side cover plate B;
[0035] 107. Wire reel compartment; 1071. Waterproof partition; 2. Base;
[0036] 201. Base plate; 2011. Receiving groove; 2012. Cable guide hole;
[0037] 202. Outrigger; 203. Hand-tightening screw; 204. U-shaped plate;
[0038] 2041, cable channel; 3, float assembly; 301, float ball;
[0039] 302. Float line; 303. Line reel; 304. Drive motor;
[0040] 3041, Motor shaft; 305, Limit block; 4, Camera;
[0041] 5. Signal transmission cable; 501. Limiting silicone tube. Detailed Implementation
[0042] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0043] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "installed," "connected," and "linked" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0044] Example 1:
[0045] Figure 1 This is a three-dimensional structural diagram of the present invention. Figure 2 This is an enlarged structural diagram of the fish finder housing in this utility model. Figure 1 , Figure 3 This is an enlarged structural diagram of the fish finder housing in this utility model. Figure 2 , Figure 4 This is an enlarged structural diagram of the base in this utility model. Figure 5 This is a schematic diagram of the assembly structure between the float assembly and the fish finder housing in this utility model. Figure 6 This is an enlarged structural schematic diagram of the float assembly in this utility model, as shown below. Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6The fish finder shown includes a fish finder body 1 and a float assembly 3. The fish finder body 1 includes a waterproof shell 101, side cover plate A102, side cover plate B106 and a camera 4. The camera 4 is installed inside the waterproof shell 101. The waterproof shell 101 serves as the basic load-bearing and protective structure of the fish finder body 1, providing a fully sealed environment to resist underwater pressure. It is made of PC / ABS engineering plastic injection molding, has high impact resistance, and prevents underwater collision and breakage. In this utility model, the side cover plate A102 and side cover plate B106 are respectively connected to the left and right sides of the waterproof shell 101, and the side cover plate A102 and side cover plate B106 constitute the two sides of the waterproof shell 101 that can be detached for maintenance. The side cover plate A102 and the side cover plate B106 are sealed with waterproof adhesive to the waterproof housing 101. A cable outlet hole 1021 is provided on the side cover plate A102. The cable outlet hole 1021 and the signal transmission cable 5 are sealed with waterproof adhesive to effectively prevent water ingress.
[0046] The float assembly 3 of this invention includes a float ball 301, a reel 303, and a drive motor 304. A reel compartment 107 is provided inside the waterproof housing 101, and the reel 303 is installed within the reel compartment 107. A waterproof partition 1071 is provided inside the reel compartment 107 to isolate it from the waterproof housing 101. The drive motor 304 is located on one side of the reel 303, and limiting blocks 305 are installed on both the left and right sides of the drive motor 304. The drive motor 304 is fixed inside the waterproof housing 101 by the limiting blocks 305. The output end of the drive motor 304 is connected to the reel 303 via the motor shaft 3041. A float line 302 is wound on the reel 303. The float ball 301 is connected to the float line 302. The drive motor 304 drives the reel 303 to reel in and out the float line 302, thereby enabling the float ball 301 to extend and retract. A reel compartment cover 105 is provided on the reel compartment 107. The reel compartment cover 105 is interlocked with the waterproof outer shell 101. A through hole 1051 is provided on the reel compartment cover 105, through which one end of the float line 302 passes and connects to the float ball 301. This invention provides a finger-loop groove 104 on the waterproof outer shell 101, located below the reel compartment cover 105. The reel compartment cover 105 can be easily removed by using the finger-loop groove 104.
[0047] This utility model also discloses a fish finder base with a retractable float structure. A fish finder with a retractable float structure is mounted on the base 2. The base 2 includes a base plate 201 and two support arms 202. The two support arms 202 are fixedly connected to the base plate 201, serving as mechanical support and angle adjustment hubs for the fish finder body 1. Hand-tightening screws 203 are installed on the support arms 202, and the hand-tightening screws 203 are screwed into the screw holes 103 of the waterproof housing 101 to adjust the position and orientation of the fish finder body 1, allowing it to be placed horizontally or vertically (as per the instruction manual). Figure 7 As shown, Figure 7 (This is a schematic diagram of the structure of a vertical fish finder). This invention features a receiving groove 2011 on the base plate 201 for placing the signal transmission cable 5. A cable passage hole 2012 is provided within the receiving groove 2011, through which the signal transmission cable 5 passes and connects to the fish finder body 1. The receiving groove 2011 serves as a directional storage channel for the signal transmission cable 5, preventing the cable from becoming tangled or washed away by water flow.
[0048] Example 2:
[0049] Figure 8 This is a schematic diagram of a suspended fish finder, as shown below. Figure 8 As shown, this utility model also discloses a fish finder with a suspended structure, including a fish finder body 1, a base 2, a float assembly 3, and a camera 4. The fish finder body 1 and the float assembly 3 are structurally identical to those in Embodiment 1 of this utility model, and will not be described again here. The base 2 includes a base plate 201, support arms 202, and a bracket 204. Two support arms 202 are fixedly connected to the base plate 201, and the bracket 204 is detachably mounted on the two support arms 202. The support arms 202 serve as the mechanical support and angle adjustment hub for the bracket 204. A hand-tightening screw 203 is installed on the support arm 202, and the hand-tightening screw 203 is screwed onto the bracket 204. A wire groove 2041 is formed on the bracket 204. This utility model has a receiving groove 2011 for placing the signal transmission cable 5 on the base plate 201. A wire hole 2012 is provided in the receiving groove 2011. The signal transmission cable 5 passes through the wire hole 2012 and the wire groove 2041 on the bracket 204 and is connected to the fish finder body 1. One end of the signal transmission cable 5 passes through the wire hole 2012 and is connected to the fish finder body 1. The other end of the signal transmission cable 5 is connected to the remote control. The remote control is connected to the display via a connecting cable. The display is a visual terminal that can display the water depth detected by the camera and the distribution of underwater fish. The display is equipped with control buttons that can adjust functions such as brightness / contrast / color / camera lens zoom.
[0050] A limiting silicone tube 501 is provided on the outer sheath of the signal transmission cable 5 to fix the camera 4. The receiving groove 2011 and the cable groove 2041 serve as directional storage channels for the signal transmission cable 5, preventing the cable from getting tangled or washed away by water flow. The base 2 sinks into the mud bottom as a gravity anchor point. This separate design allows the camera 4 to detect surface and mid-water fish (whitebait, mandarin fish, silver carp, bighead carp), unlike traditional bottom-dwelling fish finders that can only detect bottom-dwelling fish (such as carp and catfish). This design allows the fish finder body 1 to float at the target depth, completely solving the detection blind spots of surface and mid-water fish.
[0051] Working principle explanation:
[0052] 1. Deployment Preparation Phase: In Embodiment 1, the fish finder body 1 is inserted into the support arm 202 of the base 2, and the hand screw 203 is tightened to fix the angle (flat / vertical); the signal transmission cable 5 is connected and threaded into the base receiving groove 2011 and the bracket cable groove 2041 to lock the position. If Embodiment 2 is adopted, it is not necessary to fix the fish finder body 1, and the fish finder body 1 floats close to the water surface.
[0053] 2. Underwater Detection and Positioning Stage: After the equipment enters the water, it detects fish schools. The base 2 is anchored to the bottom due to the counterweight of the base plate 201. The infrared camera 4 is activated, penetrating the water to form an image. The underwater detection information is transmitted back to the display via the signal transmission cable 5. In this utility model, the signal transmission cable 5 serves as a bidirectional transmission backbone channel, realizing the synchronous interaction of control commands and image data. The controller, as the central command hub, can achieve precise control of the float line. The drive motor 304 can be controlled by the remote control, and control commands can be transmitted to the drive motor 304 to control the rotation of the reel 303, thereby realizing one-click reeling of the float line 302. At the same time, the reeling speed can be finely adjusted by the remote control. The remote control is connected to the display via a connecting cable. The display is a visual terminal that can display the water depth and the distribution of underwater fish schools. The display is equipped with control buttons that can adjust functions such as brightness / contrast / color / camera lens zoom. Figure 9 This is a circuit block diagram of the present invention, as shown below. Figure 9As shown, the circuit system of this utility model achieves functional synergy through the following connection relationships: the lithium battery serves as the core energy node, independently powering the display; the utility model has a motor controller (intelligent motor control system) inside the control box and a display motherboard (image signal conversion and display system) inside the display; the image signal conversion and display system receives power and performs digital encoding processing on the optical signal, while the intelligent motor control system parses user commands to generate drive signals; the two systems interact with the execution end device through signal transmission cables: the image signal conversion and display system outputs video data downlink to camera 4, and simultaneously receives the shooting signal uplink from camera 4 for real-time imaging display; the remote control can transmit control commands to drive motor 304, which drives reel 303 to rotate clockwise or counterclockwise, thereby realizing the release and retrieval of float ball 301, and simultaneously feeding back operating status data to complete closed-loop control. Thus, the signal transmission cable 5 constitutes a bidirectional transmission hub, capable of transmitting fish school image data collected by camera 4 uplink and transmitting motor control commands downlink, ultimately achieving coordinated operation of precise float positioning and camera detection at the mechanical end. This circuit architecture avoids signal interference by separating the power supply path and integrates control and data flows using a bidirectional cable channel, providing a fundamental electrical control guarantee for the fish finder's stable underwater detection. During positioning, the drive motor 304 is activated with a single button press via an external remote control. The drive motor 304 rotates the reel 303, releasing the float line 302 and causing the float ball 301 to rise to the surface (the float ball's position corresponds to the camera's coordinates), thus achieving the fish finder's location. Simultaneously, the float ball can also serve as a reference point for baiting (baiting), providing a precise reference point for baiting.
[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.
Claims
1. A fish finder with a retractable float structure, characterized in that, It includes the fish finder body (1) and the float assembly (3); The fish finder body (1) includes a waterproof shell (101), a side cover plate A (102), a side cover plate B (106) and a camera (4), wherein the camera (4) is installed inside the waterproof shell (101); The float assembly (3) includes a float ball (301), a reel (303), and a drive motor (304). A reel compartment (107) is provided inside the waterproof housing (101). The reel (303) is installed in the reel compartment (107). The drive motor (304) is located on one side of the reel (303). The drive motor (304) and the reel (303) are mutually driven and connected. A float line (302) is wound on the reel (303). The float ball (301) and the float line (302) are interconnected.
2. A fish finder with a retractable float structure according to claim 1, characterized in that: The reel compartment (107) is provided with a reel compartment cover (105), which is fastened to the waterproof outer shell (101). A through hole (1051) is provided on the reel compartment cover (105), and one end of the float line (302) passes through the through hole (1051) and is connected to the float ball (301).
3. A fish finder with a retractable float structure according to claim 2, characterized in that: The waterproof outer shell (101) is provided with a finger buckle groove (104), which is located below the reel compartment cover (105).
4. A fish finder with a retractable float structure according to claim 2, characterized in that: The waterproof outer shell (101) has screw holes (103) for connecting to the base (2).
5. A fish finder with a retractable float structure according to claim 1, characterized in that: Limiting blocks (305) are installed on the left and right sides of the drive motor (304) respectively, and the drive motor (304) is fixed inside the waterproof shell (101) by the limiting blocks (305).
6. A fish finder with a retractable float structure according to claim 1, characterized in that: The side cover plate A (102) and side cover plate B (106) are respectively connected to the left and right sides of the waterproof shell (101). The side cover plate A (102) and side cover plate B (106) are sealed with the waterproof shell (101) by waterproof glue. A cable outlet hole (1021) is provided on the side cover plate A (102), and the cable outlet hole (1021) is sealed with the signal transmission cable (5) by waterproof glue.
7. A fish finder with a retractable float structure according to claim 1, characterized in that: The wheel compartment (107) is provided with a waterproof partition (1071), which is used to divide the waterproof outer shell (101) into a waterproof area and a non-waterproof area.
8. A fish finder base with a retractable float structure, characterized in that: A fish finder with a retractable float structure as described in any one of claims 1 to 7 is provided on the base (2), characterized in that: the base (2) includes a base plate (201) and support arms (202), two support arms (202) are fixedly connected to the base plate (201), and a hand screw (203) is installed on the support arm (202), the hand screw (203) is screwed to the screw hole (103) of the waterproof shell (101) or screwed to the U-shaped piece (204).
9. A fish finder base with a retractable float structure according to claim 8, characterized in that: The base plate (201) has a receiving groove (2011) for placing the signal transmission cable (5). A wire hole (2012) is provided in the receiving groove (2011). One end of the signal transmission cable (5) passes through the wire hole (2012) and is connected to the camera (4) and drive motor (304) in the fish finder body (1). The other end of the signal transmission cable (5) is connected to the remote control. The remote control is connected to the display through a connecting cable.
10. A fish finder base with a retractable float structure according to claim 9, characterized in that: The signal transmission cable (5) is sheathed with a limiting silicone tube (501).