Buckle assembly type host unit and buckle assembly type ultrasonic fetus-voice meter

Abstract

The utility model relates to the technical field of medical instruments, and discloses a buckle assembly type host unit and a buckle assembly type ultrasonic fetus-voice meter. The buckle assembly type host unit comprises a buckle assembly type host shell assembly and further comprises a host power source, a host PCBA and a probe. The host power supply, the host PCBA and the probe are fixedly positioned in the host shell assembly in a buckling assembly mode, and the host power supply is electrically connected with the host PCBA and the probe respectively. A buckle assembly type design is adopted, screw fixation is omitted, the assembly process is simplified, the production efficiency and the maintenance convenience are improved, meanwhile, the structural compactness and the mechanical property are optimized, the reliability of electrical connection is ensured, and the ultrasonic fetus-voice meter is particularly suitable for portable ultrasonic fetus-voice meters with requirements for miniaturization, light weight and automatic production.

Description

Snap-fit ​​assembly main unit and snap-fit ​​assembly ultrasonic fetal heart monitor Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular, to a snap-fit ​​assembly-type main unit. Furthermore, this utility model also relates to a snap-fit ​​assembly-type ultrasonic fetal heart monitor including the aforementioned snap-fit ​​assembly-type main unit. Background Technology

[0002] In the manufacturing of existing ultrasound fetal heart monitors and similar medical electronic devices, traditional main unit units are typically assembled using screw fastening or adhesive bonding. For example, core components inside the main unit housing, such as the power module, PCBA (printed circuit board assembly), and probe, are mostly installed using screws or adhesive bonding. This assembly method has the following drawbacks:

[0003] Low production efficiency; tightening screws or curing adhesive requires additional steps and time, increasing the production cycle.

[0004] Maintenance is difficult, and disassembly requires special tools or destructive operations, which is not conducive to component replacement or repair.

[0005] The structural redundancy and screw hole design occupy the shell space, which limits the miniaturization of the product and may affect the compactness of the internal layout, thus affecting the mechanical performance of the entire structure.

[0006] In addition, the electrical connections between the power supply, PCBA, and probe of existing ultrasonic fetal heart monitors usually rely on soldering or plugging terminals, which can easily lead to misalignment or poor contact during assembly, affecting the reliability of the equipment. In particular, when ultrasonic fetal heart monitors are designed to be miniaturized, the assembly and connection of internal structures such as power supply, PCBA, and probes become more difficult, which restricts the development of lightweight, miniaturized, and portable products. Summary of the Invention

[0007] This utility model provides a snap-fit ​​assembly main unit and a snap-fit ​​assembly ultrasonic fetal heart monitor. The snap-fit ​​assembly design eliminates screw fixing, simplifies the assembly process, improves production efficiency and maintenance convenience, and optimizes structural compactness and mechanical properties, ensuring the reliability of electrical connections. It is particularly suitable for portable ultrasonic fetal heart monitors that require miniaturization, lightweighting and automated production, so as to solve the technical problems of low production efficiency, difficult maintenance, redundant structure and difficulty in miniaturization of existing ultrasonic fetal heart monitors.

[0008] According to one aspect of the present invention, a snap-fit ​​assembly type main unit is provided, including a snap-fit ​​assembly type main unit housing component, and further including a main unit power supply, a main unit PCBA and a probe; the main unit power supply, the main unit PCBA and the probe are all fixedly positioned in the main unit housing component by snap-fit ​​assembly, and the main unit power supply is electrically connected to the main unit PCBA and the probe respectively.

[0009] Furthermore, the main unit housing assembly includes a front cover, a rear cover, an inner cover, and an outer cover; the front cover and the rear cover are connected by snap-fit ​​to form the main housing, the inner cover is connected to the main housing by snap-fit, and the outer cover is connected to the inner cover by snap-fit.

[0010] Furthermore, the front and rear shells of the main unit are fixed together by beveled U-shaped buckles and ribs; multiple beveled U-shaped buckles are arranged at intervals; the beveled U-shaped buckles and ribs are arranged in a one-to-one correspondence.

[0011] Furthermore, the angled U-shaped buckles are evenly distributed on the edge of the front shell of the main unit, and the ribs are evenly distributed on the edge of the rear shell of the main unit; or the ribs are evenly distributed on the edge of the front shell of the main unit, and the angled U-shaped buckles are evenly distributed on the edge of the rear shell of the main unit; or the angled U-shaped buckles and the ribs are alternately arranged on the edge of the front shell of the main unit, and the ribs and the angled U-shaped buckles are alternately arranged on the edge of the rear shell of the main unit.

[0012] Furthermore, the main PCBA includes a button motherboard and a charging port motherboard, the probe includes a probe motherboard and a transducer, and the snap-fit ​​main unit also includes a speaker and a main magnet; the main magnet, speaker, main power supply, button motherboard, charging port motherboard and probe are arranged from top to bottom in the inner cavity of the main housing assembly; the main magnet, speaker, main power supply, button motherboard, charging port motherboard and probe motherboard are all assembled in the inner cavity of the main housing assembly by snap-fit ​​assembly.

[0013] Furthermore, the main unit magnet is assembled and fixed in the corresponding slot on the upper part of the main unit's front shell; and / or the speaker is assembled and fixed in the corresponding slot on the main unit's rear shell, and the speaker is limited in the slot on the main unit's rear shell by the top post of the main unit's front shell; and / or the main unit power supply is assembled and fixed in the corresponding slot on the main unit's rear shell, and the main unit power supply is limited in the slot on the main unit's rear shell by the top post of the main unit's front shell; and / or the button motherboard is assembled in the corresponding slots on both the main unit's front shell and the main unit's rear shell; and / or the charging port motherboard is assembled in the corresponding slots on both the main unit's front shell and the main unit's rear shell; and / or the probe motherboard is fixed to the main unit's inner cover by the first fastener; and / or the probe's measuring end is arranged facing the main unit's outer cover and sealed within the cavity formed by the main unit's outer cover and inner cover.

[0014] Furthermore, the main unit button is fixed to the front shell of the main unit via a cantilever, and the main unit button is connected to the button motherboard; and / or the main unit dust plug is connected to the rear shell of the main unit via a snap-fit; and / or the transducer is fixed to the inner cover of the main unit by applying glue, and the probe motherboard is connected to the transducer.

[0015] According to another aspect of the present invention, a snap-fit ​​ultrasonic fetal heart monitor is also provided, which includes the aforementioned snap-fit ​​main unit and display screen unit, wherein the snap-fit ​​main unit and display screen unit are separate structures.

[0016] Furthermore, the display unit includes a front display housing and a rear display housing, with the rear display housing connected to the front display housing via a snap-fit ​​connection.

[0017] Furthermore, the display screen back cover is fixed with a display screen magnet and a display screen dust plug by a snap-fit ​​mechanism. The display screen magnet is located near the lower end of the display screen back cover. And / or the display screen battery is located in the area between the display screen magnet and the display screen dust plug. The display screen power supply is glued to the display screen back cover. And / or the display screen panel is glued to the receiving groove on the outer surface of the display screen front cover. And / or the display screen motherboard is fixed in the display screen back cover by a snap-fit ​​mechanism and is electrically connected to the display screen power supply and the display screen panel respectively.

[0018] This utility model has the following beneficial effects:

[0019] This utility model relates to a snap-fit ​​assembly main unit, which removes the display portion and integrates it as an independent structure with the main unit via wireless connection. The snap-fit ​​assembly main unit replaces traditional screw fixing with a snap-fit ​​assembly method, eliminating the screw-tightening process, simplifying the assembly process, and significantly improving production efficiency. The snap-fit ​​connection allows for disassembly and assembly without special tools, facilitating the replacement and maintenance of internal components, improving product maintainability, and enabling automated production line assembly. The elimination of screw holes reduces drilling processes, avoids impacting the structural mechanical properties, and reduces unnecessary structural space occupation, resulting in a more compact internal layout and facilitating miniaturization. The snap-fit ​​assembly method ensures accurate positioning of the main unit power supply, main unit PCBA, and probes, avoiding misalignment during assembly and improving the reliability of electrical connections. The snap-fit ​​structure design rationally distributes stress points, enhancing the overall structural stability and impact resistance. This utility model's snap-fit ​​assembly main unit adopts a snap-fit ​​assembly design, eliminating screw fixing, simplifying the assembly process, improving production efficiency and maintenance convenience, while optimizing structural compactness and mechanical properties, ensuring the reliability of electrical connections. It is particularly suitable for portable ultrasonic fetal heart monitors that require miniaturization, lightweighting and automated production.

[0020] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0021] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0022] Figure 1 is a structural schematic diagram of the snap-fit ​​assembly main unit of the present utility model according to a preferred embodiment;

[0023] Figure 2 is a schematic diagram of the assembly structure of the front shell and the rear shell of the main unit according to a preferred embodiment of the present invention;

[0024] Figure 3 is a structural schematic diagram of the snap-fit ​​ultrasonic fetal heart rate monitor of a preferred embodiment of the present invention.

[0025] Legend:

[0026] 100. Main unit casing assembly; 1001. First recess; 101. Main unit front cover; 102. Main unit rear cover; 1021. Main unit dust plug; 103. Main unit inner cover; 1031. First latch; 1032. Second rib; 104. Main unit outer cover; 1041. First rib; 105. Angled U-shaped buckle; 106. Rib; 200. Main unit power supply; 300. Main unit PCBA; 301. Button motherboard; 3011. Main unit buttons ; 3012, Cantilever; 302, Charging Port Mainboard; 303, Probe Mainboard; 3031, Transducer; 400, Probe; 500, Speaker; 600, Main Unit Magnet; 700, Card Slot; 701, Top Column; 800, Display Unit; 801, Display Front Shell; 802, Display Rear Shell; 803, Display Magnet; 804, Display Dust Plug; 805, Display Power Supply; 806, Display Panel; 807, Display Mainboard. Detailed Implementation

[0027] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0028] Figure 1 is a structural schematic diagram of the snap-fit ​​assembly main unit of the present invention according to a preferred embodiment; Figure 2 is a structural schematic diagram of the assembly structure of the main unit front shell and the main unit rear shell of the present invention according to a preferred embodiment; Figure 3 is a structural schematic diagram of the snap-fit ​​assembly ultrasonic fetal heart monitor of the present invention according to a preferred embodiment.

[0029] As shown in Figure 1, the snap-fit ​​assembly host unit of this embodiment includes a snap-fit ​​assembly host housing component 100, a host power supply 200, a host PCBA 300, and a probe 400. The host power supply 200, host PCBA 300, and probe 400 are all fixedly positioned within the host housing component 100 using a snap-fit ​​assembly method. The host power supply 200 is electrically connected to both the host PCBA 300 and the probe 400. This snap-fit ​​assembly host unit removes the display portion and combines it with the host unit as an independent structure via a wireless connection. The snap-fit ​​assembly main unit replaces traditional screw fixing with a snap-fit ​​assembly method, eliminating the screw-tightening process, simplifying the assembly process, and significantly improving production efficiency. The snap-fit ​​connection allows for disassembly and assembly without special tools, facilitating the replacement and maintenance of internal components, improving product maintainability, and enabling automated production line assembly. Eliminating screw holes reduces drilling processes, avoids impacting the structural mechanical properties, and minimizes unnecessary structural space occupation, resulting in a more compact internal layout and facilitating miniaturization. The snap-fit ​​assembly method ensures accurate positioning of the main power supply 200, main PCBA 300, and probe 400, avoiding misalignment during assembly and improving the reliability of electrical connections. The snap-fit ​​structural design rationally distributes stress points, enhancing the overall structural stability and impact resistance. This utility model's snap-fit ​​assembly main unit adopts a snap-fit ​​assembly design, eliminating screw fixing, simplifying the assembly process, improving production efficiency and maintenance convenience, while optimizing structural compactness and mechanical properties, ensuring the reliability of electrical connections. It is particularly suitable for portable ultrasonic fetal heart monitors that require miniaturization, lightweight design, and automated production. Optionally, the main power supply 200 uses a lithium battery.

[0030] As shown in Figures 1 and 2, in this embodiment, the main unit housing assembly 100 includes a front housing 101, a rear housing 102, an inner cover 103, and an outer cover 104. The front housing 101 and the rear housing 102 are connected by snap-fit ​​to form the main housing. The inner cover 103 is snap-fitted to the main housing, and the outer cover 104 is snap-fitted to the inner cover 103. Preferably, the outer cover 104 is fixed to the outer side of the inner cover 103 by an interference fit of a first protrusion 1041 on its inner side. The inner cover 103 has a second protrusion 1032 on its inner side, and the bottom of the front housing 101 and the rear housing 102 have a first groove 1001 (claw) that engages with the second protrusion 1032 for fixation. The main housing of the host is formed by the snap-fit ​​connection between the front shell 101 and the rear shell 102. Combined with the layered snap-fit ​​assembly of the inner cover 103 and the outer cover 104, modular assembly of the host housing assembly 100 is achieved, significantly improving assembly efficiency. The multi-layer snap-fit ​​connection (main housing - inner cover 103 - outer cover 104) forms a composite support structure. Through the mutual constraint between layers, the overall impact resistance and structural strength of the housing are effectively improved. Each layer of the composite support structure can be independently disassembled, facilitating localized repairs or component replacement for specific faulty layers, significantly reducing maintenance costs. The layered snap-fit ​​design replaces traditional screw fixing, avoiding the space occupied by connecting parts between multiple housing layers, freeing up more layout space for internal functional components (such as the host PCBA300 and the host power supply 200). The stepped design of the multi-layer snap-fit ​​structure forms multiple protective barriers, which is more conducive to optimizing sealing performance compared to a single-layer housing. By eliminating the screw-connecting bosses between traditional multi-layer housings, the overall thickness of the host housing assembly 100 is reduced, better meeting the compact structure requirements of medical equipment.

[0031] As shown in Figures 1 and 2, in this embodiment, the front shell 101 and the rear shell 102 of the main unit are fixed together by beveled U-shaped buckles 105 and protruding ribs 106. Multiple beveled U-shaped buckles 105 are arranged at intervals. Each beveled U-shaped buckle 105 corresponds to a protruding rib 106. The closed-loop structure of the beveled U-shaped buckle 105 and its beveled design form a multi-directional constraint, ensuring even force distribution between the front shell 101 and the rear shell 102 during connection, avoiding the unidirectional stress concentration problem of traditional straight buckles. The beveled structure of the beveled U-shaped buckle 105 provides a progressive guiding effect during the fastening process, reducing assembly resistance and ensuring precise alignment between the protruding rib 106 and the beveled U-shaped buckle 105, improving the success rate of first-time assembly. The multiple beveled U-shaped buckles 105 arranged at intervals form a matrix support. By dispersing external impact loads, the drop resistance and torsion resistance of the shell seams are significantly enhanced; the closed-loop buckle structure of the beveled U-shaped buckle 105 and the continuous engagement of the corresponding rib 106 form a continuous sealed ring on the joint surface, effectively blocking the dust / liquid penetration path, which is superior to the sealing effect of discrete buckles; the "one-to-one positioning" design of the beveled U-shaped buckle 105 and the rib 106 eliminates the accumulation of assembly tolerances, prevents the main shell of the host from loosening and making abnormal noises after long-term use, and extends the service life of the overall structure.

[0032] As shown in Figures 1 and 2, in this embodiment, the angled U-shaped buckles 105 are evenly distributed on the edge of the front shell 101 of the main unit, and the raised ribs 106 are evenly distributed on the edge of the rear shell 102 of the main unit; or the raised ribs 106 are evenly distributed on the edge of the front shell 101 of the main unit, and the angled U-shaped buckles 105 are evenly distributed on the edge of the rear shell 102 of the main unit; or the angled U-shaped buckles 105 and the raised ribs 106 are alternately arranged on the edge of the front shell 101 of the main unit, and the raised ribs 106 and the angled U-shaped buckles 105 are alternately arranged on the edge of the rear shell 102 of the main unit. These three distribution methods (the front shell 101 is entirely composed of angled U-shaped buckles 105, the rear shell 102 is entirely composed of angled U-shaped buckles 105, and the angled U-shaped buckles 105 and raised ribs 106 are alternately distributed) provide flexible choices for the production process, adapt to different mold designs and production conditions, and lower the manufacturing threshold. All three configurations maintain the same reverse tripping stroke during disassembly, ensuring tool compatibility between different housing versions. Regardless of the distribution method, the closed-loop characteristic of the angled U-shaped snap fastener 105 ensures a continuous sealing line at the mating surface, eliminating the risk of gap leakage inherent in traditional point-type snap fasteners. The alternating distribution scheme creates an interlocking structure between the angled U-shaped snap fastener 105 and the raised rib 106, forming a mesh-like stress distribution at the housing joints, effectively suppressing local deformation and improving overall structural rigidity. The progressive engagement process between the angled U-shaped snap fastener 105 and the raised rib 106 during the alternating distribution generates a stepped feedback force, providing operators with clear tactile indications of proper assembly.

[0033] As shown in Figure 1, in this embodiment, the host PCBA 300 includes a button motherboard 301 and a charging port motherboard 302, the probe 400 includes a probe motherboard 303 and a transducer 3031, and the snap-fit ​​host unit also includes a speaker 500 and a host magnet 600; the host magnet 600, speaker 500, host power supply 200, button motherboard 301, charging port motherboard 302 and probe 400 are arranged from top to bottom in the inner cavity of the host housing assembly 100; the host magnet 600, speaker 500, host power supply 200, button motherboard 301, charging port motherboard 302 and probe motherboard 303 are all assembled in the inner cavity of the host housing assembly 100 by snap-fit ​​assembly. Each functional component (main magnet 600, speaker 500, main power supply 200, main PCBA 300, probe 400) adopts a vertically spaced layout, combined with a snap-fit ​​fixing method, to achieve efficient utilization of three-dimensional space and significantly improve the internal space compression ratio of the housing. The main magnet 600 and the electronic motherboard (button motherboard 301, charging port motherboard 302, probe motherboard 303) are arranged in an isolated manner from top to bottom. Through the dual effects of distance attenuation and physical isolation, the interference of magnetic fields on sensitive circuits is effectively reduced. The speaker 500 is located on the upper layer near the sound outlet of the housing. The snap-fit ​​fixing ensures the consistency of vibration coupling between the sound unit and the housing, avoiding the sound energy loss caused by traditional screw fixing. The main power supply 200 is centrally located, forming a convection heat dissipation channel with the upper magnetic structure and the lower electronic motherboard. The snap-fit ​​connection retains necessary gaps, which is better than the heat accumulation problem caused by the excessive constraint of screw fastening. Each layer of components is independently snap-fit ​​positioned, eliminating the error accumulation of traditional series assembly and ensuring the final assembly accuracy of precision components such as probe 400. The modular layered design supports the individual disassembly and replacement of faulty components without the need for overall disassembly, improving maintenance efficiency.

[0034] As shown in Figures 1 and 2, in this embodiment, the host magnet 600 is assembled and fixed in the corresponding slot 700 on the upper part of the host front cover 101; and / or the speaker 500 is assembled and fixed in the corresponding slot 700 of the host rear cover 102, and the speaker 500 is limited in the slot 700 of the host rear cover 102 by the top post 701 of the host front cover 101; and / or the host power supply 200 is assembled and fixed in the corresponding slot 700 of the host rear cover 102, and the host power supply 200 is limited in the slot 700 of the host rear cover 102 by the top post 701 of the host front cover 101; and / or the button motherboard 301 is also assembled. The corresponding slots 700 in the front cover 101 and the rear cover 102 of the main unit are installed in the corresponding slots 700 in the front cover 101 and the rear cover 102 of the main unit; and / or the charging port motherboard 302 is also installed in the corresponding slots 700 in the front cover 101 and the rear cover 102 of the main unit; and / or the probe motherboard 303 is fixed to the inner cover 103 of the main unit by the first fastener 1031; and / or the measuring end of the probe 400 is arranged facing the outer cover 104 of the main unit and is sealed in the cavity formed by the outer cover 104 of the main unit and the inner cover 103 of the main unit, and the measuring end of the probe 400 is located on the side of the inner cover 103 of the main unit facing the outer cover 104 of the main unit. The speaker 500 and main unit power supply 200 employ a dual constraint of single-shell (main unit rear shell 102) fixing with slot 700 and top post 701 limiting, ensuring the positioning accuracy of core components in the XYZ three-axis directions. The slot 700 and top post 701 limiting design of the main unit power supply 200 can resist mechanical impact. The speaker 500 is compositely fixed by the front shell top post and the slot 700 of the main unit rear shell 102, forming an acoustic vibration reduction structure to reduce resonance distortion. The button motherboard 301 and charging port motherboard 302 adopt a double-shell (main unit front shell 101, main unit rear shell 102) collaborative buckling to eliminate the risk of motherboard bending and deformation. The charging port motherboard 302 is fixed by a double shell (main unit front shell 101, main unit rear shell 102), forming a Faraday cage effect through the slot 700. The button motherboard 301 is fixed by a double shell (main unit front shell 101, main unit rear shell 102) to ensure consistent touch feedback. The rigid fastening between the probe motherboard 303 and the inner cover 103 of the main unit blocks the transmission path of the ultrasonic transducer (transducer plate 3031) vibration to each housing. The dedicated positioning of the main unit magnet 600 and the corresponding slot 700 on the front cover 101 of the main unit establishes a directional magnetic field shielding area, reducing interference to the lower electronic motherboards. The encapsulation design of the probe 400's measuring end facing the outer cover 104 of the main unit provides better protection for the probe 400.

[0035] As shown in Figure 1, in this embodiment, the main unit button 3011 is fixed to the front shell 101 of the main unit via a cantilever 3012, and the main unit button 3011 is connected to the button motherboard 301; and / or the main unit dust plug 1021 is connected to the rear shell 102 of the main unit via a snap-fit; and / or the transducer 3031 is fixed to the inner cover 103 of the main unit by adhesive, and the probe motherboard 303 is connected to the transducer 3031. The main unit button 3011 adopts a cantilever button design, which ensures the pressing life while maintaining touch sensitivity, and the button travel consistency deviation is smaller. The snap-fit ​​connection of the main unit dust plug 1021 allows for one-handed operation and ensures that more insertion and removal cycles can be completed. The adhesive fixation of the transducer 3031 forms an acoustic impedance matching layer, which improves the transmission efficiency of the ultrasonic echo signal. The probe motherboard 303 and the transducer 3031 are rigidly fixed and positioned relative to each other by the inner cover 103 of the main unit. The probe motherboard 303 and the transducer 3031 adopt a stable electrical connection to ensure stable impedance of the signal transmission path.

[0036] As shown in Figure 3, the snap-fit ​​assembly type ultrasonic fetal heart monitor of this embodiment includes the above-mentioned snap-fit ​​assembly type main unit and display screen unit 800. The snap-fit ​​assembly type main unit and the display screen unit 800 are separate structures.

[0037] As shown in Figure 3, in this embodiment, the display unit 800 includes a front display shell 801 and a rear display shell 802, with the rear display shell 802 connected to the front display shell 801 via a snap-fit ​​connection. The snap-fit ​​connection between the front and rear display shells 801 and the main unit forms a unified assembly process, shortening the overall assembly time. Optionally, the snap-fit ​​connection between the front and rear display shells 801 and 802 can also be secured using an angled U-shaped snap-fit ​​105 and a raised rib 106. The modular design supports parallel assembly of the display unit 800 and the main unit, improving production line efficiency. The standardized snap-fit ​​interface design of the display unit 800 supports rapid upgrades and replacements. The snap-fit ​​structure of the display unit 800 complements the main unit mechanically. The display unit 800 and the main unit are connected magnetically and wirelessly for communication. The display unit 800 can be disassembled and replaced independently of the main unit, making it easier to replace, maintain, and use compared to traditional integrated units.

[0038] As shown in Figure 3, in this embodiment, the display screen rear cover 802 is fixed with a display screen magnet 803 and a display screen dust plug 804 by snap-fit. The display screen magnet 803 is positioned near the lower end of the display screen rear cover 802; and / or the display screen battery is positioned in the area between the display screen magnet 803 and the display screen dust plug 804; the display screen power supply 805 is adhesively attached to the display screen rear cover 802; and / or the display screen panel 806 is adhesively attached to a receiving groove on the outer surface of the display screen front cover 801; and / or the display screen motherboard 807 is fixed inside the display screen rear cover 802 by snap-fit ​​and is electrically connected to the display screen power supply 805 and the display screen panel 806 respectively. The display screen magnet 803 and the display screen dust plug 804 are fixed to the display screen rear cover 802 by snap-fit, which enables quick assembly and disassembly. The snap-fit ​​structure of the display screen dust plug 804 blocks external contaminants. The display motherboard 807 is secured within the display back cover 802 using snap-fit ​​fasteners, forming a sealed display window. The display power supply 805 is adhesively attached to the display back cover 802, creating a differentiated fixing solution. The display panel 806 is embedded with adhesive, reducing the overall thickness. Direct electrical connections between the display motherboard 807, the display power supply 805, and the display panel 806 ensure signal transmission. The display power supply 805 (optionally a lithium battery) is placed between the display magnet 803 and the display dust plug 804 for efficient space utilization. The display magnet 803 is located at the lower end of the display back cover 802, enhancing the magnetic positioning stability with the main unit. The modular design supports individual component replacement, and the combination of snap-fit ​​and adhesive facilitates tiered maintenance, achieving efficient assembly and maintenance of the display unit 800 while ensuring structural strength.

[0039] In practice, a split-type ultrasonic fetal heart monitor is provided, which has a snap-fit ​​assembly structure. The front shell 801 of the display screen, the rear shell 802 of the display screen, the front shell 101 of the main unit, the rear shell 102 of the main unit, the main unit magnet 600, the display screen magnet 803, the PCBA, etc. are all assembled using a snap-fit ​​process. The whole machine is fixed without a single screw, resulting in high production efficiency.

[0040] When performing fetal heart rate monitoring, open the outer cover 104 of the main unit and separate the display unit 800 from the main unit with one hand. Apply an appropriate amount of coupling agent to the measuring end of the probe 400, place the probe 400 tightly against the pregnant woman's abdominal wall, and press the button 3011 on the main unit to start monitoring.

[0041] The main unit includes a main unit rear shell 102 and a main unit front shell 101 through which a beveled U-shaped buckle 105 is introduced via a protruding buckle connecting strap. The main unit front shell 101 is provided with three sets of beveled U-shaped buckles 105, and the main unit rear shell 102 is provided with three sets of corresponding beveled U-shaped buckles 105 protrusions 106. The beveled U-shaped buckles 105 are fastened and fixed to the protrusions 106. The rear cover 102 of the main unit has a slot 700 to fix the speaker 500 and the main unit lithium battery (main unit power supply 200), which are limited by the top post 701 on the front cover 101 of the main unit. The front cover 101 of the main unit has a buckle to fix the main unit magnet 600 and the main unit button 3011 is installed by heat fusion. The button motherboard 301 and the charging port motherboard 302 are fixed by the slots 700 on the front cover 101 and the rear cover 102 of the main unit. The main unit button 3011 is fixed to the front cover 101 of the main unit by the cantilever 3012. The main unit dust plug 1021 is connected to the rear cover 102 of the main unit by a buckle. The probe motherboard 303 is fixed to the inner cover 103 of the main unit by a buckle. The transducer 3031 connected to the probe motherboard 303 is fixed to the inner cover 103 of the main unit by glue. The outer cover 104 of the main unit is connected to the inner cover 103 of the main unit by a buckle. The display unit 800 includes a display back cover 802 and a display front cover 801 connected by a snap fastener. The display back cover 802 is fixed with a display magnet 803 and a display dust plug 804 by a snap fastener. The display lithium battery (display power supply 805) is attached to the bottom surface of the display back cover 802 by double-sided adhesive. The display panel 806 is fixed to the display front cover 801 by 3M double-sided adhesive. The light guide column is installed in the hole of the display front cover 801 by interference fit. The display motherboard 807 is fixed to the display back cover 802 by a snap fastener and is connected to the display lithium battery (display power supply 805) by a wire.

[0042] Any matters not covered in this utility model are common knowledge.

[0043] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0044] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

[0045] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A snap-fit ​​assembly type main unit, characterized in that, The device includes a snap-fit ​​main housing assembly (100), a main power supply (200), a main PCBA (300), and a probe (400). The main power supply (200), the main PCBA (300), and the probe (400) are all fixedly positioned in the main housing assembly (100) by snap-fit ​​assembly. The main power supply (200) is electrically connected to the main PCBA (300) and the probe (400) respectively.

2. The snap-fit ​​assembly main unit according to claim 1, characterized in that, The main unit housing assembly (100) includes a front housing (101), a rear housing (102), an inner cover (103), and an outer cover (104). The front housing (101) and the rear housing (102) are connected by snap-fit ​​to form the main housing. The inner cover (103) is connected to the main housing by snap-fit, and the outer cover (104) is connected to the inner cover (103) by snap-fit.

3. The snap-fit ​​assembly main unit according to claim 2, characterized in that, The front shell (101) and the rear shell (102) of the main unit are fastened together by an angled U-shaped buckle (105) and a rib (106); multiple angled U-shaped buckles (105) are arranged in a spaced manner; the angled U-shaped buckles (105) and the ribs (106) are arranged in a one-to-one correspondence.

4. The snap-fit ​​assembly main unit according to claim 3, characterized in that, Angled U-shaped buckles (105) are evenly distributed on the edge of the front shell (101) of the main unit, and protruding ribs (106) are evenly distributed on the edge of the rear shell (102) of the main unit; or protruding ribs (106) are evenly distributed on the edge of the front shell (101) of the main unit, and angled U-shaped buckles (105) are evenly distributed on the edge of the rear shell (102) of the main unit; or angled U-shaped buckles (105) and protruding ribs (106) are alternately arranged on the edge of the front shell (101) of the main unit, and protruding ribs (106) and angled U-shaped buckles (105) are alternately arranged on the edge of the rear shell (102) of the main unit.

5. The snap-fit ​​assembly main unit according to any one of claims 2 to 4, characterized in that, The main PCBA (300) includes a button motherboard (301) and a charging port motherboard (302). The probe (400) includes a probe motherboard (303) and a transducer (3031). The snap-fit ​​main unit also includes a speaker (500) and a main magnet (600). The main magnet (600), speaker (500), main power supply (200), button motherboard (301), charging port motherboard (302) and probe (400) are arranged from top to bottom in the inner cavity of the main housing assembly (100). The main magnet (600), speaker (500), main power supply (200), button motherboard (301), charging port motherboard (302) and probe motherboard (303) are all assembled in the inner cavity of the main housing assembly (100) by snap-fit ​​assembly.

6. The snap-fit ​​assembly main unit according to claim 5, characterized in that, The main unit magnet (600) is mounted and fixed in the corresponding slot (700) on the upper part of the main unit front shell (101); and / or the speaker (500) is mounted and fixed in the corresponding slot (700) of the main unit rear shell (102), and the speaker (500) is limited in the slot (700) of the main unit rear shell (102) by the top post (701) of the main unit front shell (101); and / or the main unit power supply (200) is mounted and fixed in the corresponding slot (700) of the main unit rear shell (102), and the main unit power supply (200) is limited in the slot (700) of the main unit rear shell (102) by the top post (701) of the main unit front shell (101); and / or The button motherboard (301) is simultaneously installed in the corresponding slot (700) of the front shell (101) of the host and the corresponding slot (700) of the rear shell (102) of the host; and / or the charging port motherboard (302) is simultaneously installed in the corresponding slot (700) of the front shell (101) of the host and the corresponding slot (700) of the rear shell (102) of the host; and / or the probe motherboard (303) is fixed on the inner cover (103) of the host by the first fastener (1031); and / or the measuring end of the probe (400) is arranged towards the outer cover (104) of the host and sealed in the cavity formed by the outer cover (104) of the host and the inner cover (103) of the host.

7. The snap-fit ​​assembly main unit according to claim 5, characterized in that, The main unit button (3011) is fixed to the front shell (101) of the main unit via a cantilever (3012), and the main unit button (3011) is connected to the button motherboard (301); and / or the main unit dust plug (1021) is connected to the rear shell (102) of the main unit via a snap-fit; and / or the transducer (3031) is fixed to the inner cover (103) of the main unit by applying glue, and the probe motherboard (303) is connected to the transducer (3031).

8. A snap-fit ​​type ultrasonic fetal heart monitor, characterized in that, The device includes a snap-fit ​​main unit and a display unit (800) as described in any one of claims 1 to 7, wherein the snap-fit ​​main unit and the display unit (800) are separate structures.

9. The snap-fit ​​ultrasonic fetal heart monitor according to claim 8, characterized in that, The display unit (800) includes a front display shell (801) and a rear display shell (802), with the rear display shell (802) connected to the front display shell (801) by a snap-fit ​​connection.

10. The snap-fit ​​ultrasonic fetal heart monitor according to claim 9, characterized in that, The display screen back cover (802) is fixed with a display screen magnet (803) and a display screen dust plug (804) by a snap-fit. The display screen magnet (803) is arranged near the lower end of the display screen back cover (802). And / or the display screen battery is arranged in the area between the display screen magnet (803) and the display screen dust plug (804). The display screen power supply (805) is glued to the display screen back cover (802). And / or the display screen panel (806) is glued to the receiving groove on the outer surface of the display screen front cover (801). And / or the display screen main board (807) is fixed in the display screen back cover (802) by a snap-fit ​​and is electrically connected to the display screen power supply (805) and the display screen panel (806) respectively.

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