Packaging structure of muscle relaxation sensor chip
Through a muscle relaxation sensor chip packaging structure that includes an inner shell and a chip component, the difficulty in sensor assembly and the consistency of the packaging process are solved, and higher production yield and anti-interference performance are achieved.
Patent Information
- Application Number
- CN202420261075.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-02
- Publication Date
- 2025-01-21
- Estimated Expiration
- 2034-02-02
AI Technical Summary
During the production process, muscle relaxation sensors have difficulty in assembly and difficult to control the consistency of packaging process, resulting in high production failure rate.
A packaging structure of a muscle relaxant sensor chip is adopted, including an inner shell and a chip assembly. The sensor chip is located in the installation cavity of the inner shell. The connecting pipe penetrates into the installation cavity and penetrates with the electrical connector. The packaging layer fills the gaps and notches to closed.
The assembly process is simplified, the consistency of the packaging process is improved, the production defect rate is reduced, and the anti-interference performance of the sensor is improved through the anti-interference layer.
Smart Images
Figure CN222380572U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of sensor packaging, and in particular relates to a packaging structure of a muscle relaxation sensor chip. Background Art
[0002] The muscle relaxation sensor is a detection element that uses a gravity accelerometer to measure the degree of muscle relaxation under electrical signal stimulation, thereby helping doctors understand the depth of anesthesia during surgery. The muscle relaxation sensor is generally fixed on the patient's finger to monitor the neuromuscular transmission function.
[0003] EMC test, also known as electromagnetic compatibility (EMC) test, refers to the comprehensive evaluation of the electromagnetic interference (EMI) and anti-interference ability (EMS) of electronic products. It is one of the most important indicators of product quality. The electromagnetic compatibility measurement system consists of test sites and test instruments. EMC test is one of the important tests for detecting the anti-interference performance of muscle relaxation sensors. However, muscle relaxation sensors are small in size and have difficulty in assembly during the production process. In addition, due to the small size of the product and insufficient electrical clearance, EMC and safety reliability have also become a problem that is difficult to effectively solve, limiting the improvement of finished product yield. Based on this, it is necessary to propose a new packaging structure to solve the above problems. Utility Model Content
[0004] In order to solve the above technical problems, the purpose of the utility model is to provide a packaging structure of a muscle relaxation sensor chip, which solves the problem that similar sensors are difficult to assemble and the consistency of the packaging process is difficult to control, resulting in a high production defect rate.
[0005] In order to achieve the above utility model purpose, the technical solution adopted by the utility model is as follows:
[0006] A packaging structure for a muscle relaxation sensor chip comprises an inner shell and a chip assembly, wherein the chip assembly comprises a sensor chip and a connecting pipe fitting, wherein the inner shell is provided with a mounting cavity, wherein the sensor chip is located in the mounting cavity, wherein one end of the connecting pipe fitting penetrates into the mounting cavity and is close to the sensor chip, wherein an electrical connector of the sensor chip penetrates through the connecting pipe fitting and exits from the other end of the connecting pipe fitting, and wherein a packaging layer is provided between the inner shell and the sensor chip to fill and seal a gap between the sensor chip and the inner shell and a notch of the mounting cavity.
[0007] Preferably, an anti-interference layer is provided between the sensor chip and the inner shell, and the anti-interference layer is located inside the packaging layer.
[0008] More preferably, the anti-interference layer comprises copper foil.
[0009] More preferably, positioning parts are respectively provided on the two wall surfaces of the installation cavity facing the front and back sides of the sensor chip, and along the assembly direction, the positioning parts are provided with insertion seams for facilitating the insertion of the anti-interference layer, and the thickness of the insertion seams is greater than or equal to the thickness of the anti-interference layer.
[0010] Preferably, a card slot adapted to the sensor chip is provided in the installation cavity, and two of the card slots are provided on two side walls of the installation cavity along the assembly direction, and two sides of the sensor chip are embedded in the card slots on both sides.
[0011] Preferably, the packaging structure further comprises an outer shell, the outer shell is sleeved outside the inner shell, and the connecting pipe extends out of the outer shell.
[0012] More preferably, a plurality of positioning members are disposed on the outer surface of the inner shell, a plurality of positioning matching parts matching with the positioning members are disposed on the inner wall of the outer shell, and the positioning members of the inner shell are connected to the positioning matching parts of the outer shell.
[0013] More preferably, the positioning piece is a protrusion, and the positioning matching portion is a through hole.
[0014] More preferably, the housing is a split structure or an integrated structure.
[0015] More preferably, the housing is an integral structure formed by injection molding.
[0016] Beneficial effects:
[0017] The utility model is simple to operate when loading the sensor chip and setting the packaging layer, which solves the problem that similar sensors are difficult to assemble and the consistency of the packaging process is difficult to control, resulting in a high production defect rate. In addition, due to the presence of the adhesive layer, key components on the sensor chip and the connection part between the sensor chip and the electrical connector are firmly protected, which solves the problem of unstable performance of similar sensors. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 Shown is a schematic diagram of the three-dimensional structure of the packaging structure of the muscle relaxation sensor chip of some embodiments of the utility model;
[0019] Figure 2 for Figure 1 A schematic diagram of the three-dimensional structure of the inner shell shown;
[0020] Figure 3 for Figure 1 A schematic diagram of the three-dimensional structure of the chip assembly shown;
[0021] Figure 4 for Figure 1 The schematic diagram of the three-dimensional exploded structure of the inner shell and the chip assembly in an unassembled state is shown;
[0022] Figure 5 for Figure 1 The three-dimensional structural diagram of the inner shell and the chip assembly in the assembled state is shown;
[0023] Figure 6 for Figure 1 The three-dimensional structure schematic diagram of the inner shell and the chip assembly in the assembled state from another perspective, wherein A is the assembly direction;
[0024] Figure 7 for Figure 1 The internal schematic diagram of the inner shell and the chip assembly in the assembled state is shown;
[0025] Figure 8 for Figure 1 A schematic diagram of the opening direction of the installation cavity of the inner shell is shown.
[0026] Reference numerals: 1-chip assembly, 2-inner shell, 3-outer shell, 4-packaging layer, 5-anti-interference layer;
[0027] 11-sensor chip, 12-connecting pipe fittings, 13-electrical connectors;
[0028] 21-installation cavity, 22-positioning piece, 23-first communication hole, 24-slot, 25-positioning part, 26-insertion seam;
[0029] 31 - positioning and fitting portion, 32 - second connecting hole. DETAILED DESCRIPTION
[0030] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.
[0031] The technical solution of the utility model is described in detail below with specific embodiments.
[0032] like Figure 1-8 As shown, the utility model provides a new packaging structure for a muscle relaxation sensor, including an inner shell 2 and a chip assembly 1, wherein the chip assembly 1 includes a sensor chip 11 and a connecting pipe 12, wherein the sensor chip 11 is a muscle relaxation sensor, the inner shell 2 is provided with a mounting cavity 21 for accommodating the sensor chip 11, the sensor chip 11 is in the mounting cavity 21, the inner shell 2 is provided with a first connecting hole 23 adapted to the connecting pipe 12, the first connecting hole 23 leads to the mounting cavity 21, based on the attached Figure 2From the perspective of , the first connecting hole 23 is located at the rear of the mounting cavity 21, one end of the connecting pipe 12 passes through the first connecting hole 23 close to the sensor chip 11, the electrical connector 13 of the sensor chip 11 passes through the connecting pipe 12 and comes out from the other end of the connecting pipe 12, and a packaging layer 4 is arranged between the inner shell 2 and the sensor chip 11 to fill and seal the gap between the sensor chip 11 and the inner shell 2 and the notch of the mounting cavity 21.
[0033] The packaging process of the utility model is as follows: when the connecting pipe 12 passes through the first connecting hole 23 in the installation cavity 21, the electrical connector 13 of the sensor chip 11 is first passed through the connecting pipe 12, and then the connecting pipe 12 enters the installation cavity 21 and extends out from the first connecting hole 23, and the connecting pipe 12 is pulled outward at the first connecting hole 23 until the end of the connecting pipe 12 close to the sensor chip 11 is in the installation cavity 21 and the other part of the connecting pipe 12 is outside the inner shell 2, completing the connection between the connecting pipe 12 and the inner shell 2, and then pulling the electrical connector 13 until the sensor chip 11 completely enters the installation cavity 21, completing the sensor The chip 11 is initially positioned in the inner shell 2, and finally a packaging filling material is injected into the gap between the sensor chip 11 and the inner shell 2 until the mounting cavity 21 is filled, such as glue materials such as epoxy resin, to form a packaging layer 4; wherein, when the packaging filling material is injected, the gap between the connecting pipe 12 and the inner shell 2 is filled, and the end of the connecting pipe 12 in the mounting cavity 21 is fixed by the packaging layer 4 and will not fall out of the inner shell 2, one end of the connecting pipe 12 in the mounting cavity 21, the sensor body and the inner shell 2 are fixed by the packaging layer 4, and the sensor body is completely enclosed by the packaging layer 4 inside the inner shell 2, completing the packaging of the muscle relaxation sensor chip 11.
[0034] In some embodiments, in addition to pulling the sensor chip 11, the sensor chip 11 can also be assembled in the installation cavity 21 by pushing the sensor chip 11. In this case, the connecting pipe 12 can be made of hard material to facilitate the installation of the sensor chip 11. In the process of pushing the sensor chip 11, the connecting pipe 12 is also pushed to the appropriate position.
[0035] In some embodiments, the electrical connection member 13 may be a cable, a wire, etc. It is understandable that it may also be an electrical connector, a contact connection structure, etc.
[0036] The utility model does not require strict requirements when loading the sensor chip 11 and setting the packaging layer 4, and the assembly steps are simple. In addition, due to the existence of the packaging layer 4, the key components on the sensor chip 11 and the connection part between the sensor chip 11 and the electrical connector 13 are firmly protected, which solves the problem of poor EMC and safety reliability. The packaging process of the utility model has good consistency.
[0037] In order to simplify the assembly steps, a card slot 24 adapted to the sensor chip 11 is provided in the mounting cavity 21, and two card slots 24 are provided on the two side walls of the mounting cavity 21 along the assembly direction, and the two sides of the sensor chip 11 are embedded in the card slots 24 on both sides to achieve positioning. The card slot 24 has a guiding and positioning function for the sensor chip 11, and can prevent the sensor chip 11 from being displaced in the mounting cavity 21 during the formation of the packaging layer 4, and the packaging process has good consistency.
[0038] In order to improve the anti-interference performance of the sensor chip 11, an anti-interference layer 5 is provided between the sensor chip 11 and the inner shell 2, and the anti-interference layer 5 is located inside the encapsulation layer 4. During the assembly process, after the sensor body is initially positioned in the mounting cavity 21 of the inner shell 2, the anti-interference layer 5 is placed between the sensor body and the inner shell 2. At this time, there is a gap between the anti-interference layer 5 and the sensor chip 11, and there is also a gap between the anti-interference layer 5 and the inner shell 2. After the encapsulation filling material is injected, the anti-interference layer 5 is fixed outside the sensor chip 11. It can be understood that the number of anti-interference layers 5 is at least two, and they are located outside the front and back surfaces of the sensor chip 11.
[0039] Furthermore, the anti-interference layer 5 can be copper foil, which can effectively absorb or reflect electromagnetic waves. When electromagnetic waves encounter copper foil, the energy of the electromagnetic waves will be absorbed or reflected by the copper foil, thereby reducing its propagation distance and intensity. By covering the area to be shielded with copper foil, the influence of external electromagnetic interference on internal equipment can be effectively blocked.
[0040] In order to simplify the steps of loading and positioning the anti-interference layer 5, positioning parts 25 are respectively provided on the two wall surfaces of the mounting cavity 21 facing the front and back sides of the sensor chip 11. There is a gap between the positioning part 25 and the sensor chip 11, and the packaging filling material can enter the gap between the positioning part 25 and the sensor chip 11 to fix the sensor chip 11. Along the assembly direction, the positioning part 25 is provided with an insertion seam 26 for facilitating the insertion of the anti-interference layer 5. The thickness of the insertion seam 26 is greater than or equal to the thickness of the anti-interference layer 5, and the opening direction of the insertion seam 26 is the same as the opening direction of the mounting cavity 21. During the assembly process, after the sensor chip 11 is completely loaded into the mounting cavity 21, the anti-interference layer 5 is inserted into the insertion seam 26 of the positioning part 25 to achieve positioning. During the process of forming the packaging layer 4, the anti-interference layer 5 remains stable in the mounting cavity 21 without displacement, and has no effect on the process of the packaging layer 4 covering the sensor chip 11.
[0041] Furthermore, the packaging structure further includes an outer shell 3, which is sleeved outside the inner shell 2 to close the notch of the mounting cavity 21 of the inner shell 2, and the outer shell 3 is provided with a second communication hole 32 adapted to the connecting pipe 12, and the connecting pipe 12 passes through the second communication hole 32 of the outer shell 3. It can be understood that the second communication hole 32 is aligned with the first communication hole 23, so that the connecting pipe 12 can pass through the outer shell 3. The inner shell 2 is wrapped by the outer shell 3, and the notch of the mounting cavity 21 is blocked by the outer shell 3 after being closed by the packaging layer 4, and the packaging structure has good integrity.
[0042] The outer surface of the inner shell 2 is provided with a plurality of positioning members 22, and the inner wall of the outer shell 3 is provided with a plurality of positioning matching parts 31 that match the positioning members 22. The positioning members 22 of the inner shell 2 are connected with the positioning matching parts 31 of the outer shell 3 to realize the connection between the outer shell 3 and the inner shell 2. In some embodiments, the positioning members 22 are protrusions, such as Figure 1-2 As shown, the positioning matching portion 31 is a through hole or a recess. It can be understood that the positioning member 22 can also be a recess, and the positioning matching member is a protrusion.
[0043] It can be understood that the outer shell 3 can be a split structure or an integrated structure. When the outer shell 3 is a split structure, the outer shell 3 includes a first half shell and a second half shell, the first half shell and the second half shell wrap the inner shell 2, and the first half shell and the second half shell can be connected and locked by fasteners. When the outer mold is an integrated structure, the outer shell 3 is formed by injection molding outside the assembled inner shell 2.
[0044] The embodiments provided by the utility model are described in detail above. Specific examples are used in this article to illustrate the principle and implementation method of the utility model. The description of the above embodiments is only used to help understand the core idea of the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.
Claims
1. A packaging structure of a muscle relaxation sensor chip, characterized in that: The invention comprises an inner shell (2) and a chip assembly (1), wherein the chip assembly (1) comprises a sensor chip (11) and a connecting pipe (12), wherein the inner shell (2) is provided with a mounting cavity (21), wherein the sensor chip (11) is located in the mounting cavity (21), wherein one end of the connecting pipe (12) penetrates into the mounting cavity (21) and is close to the sensor chip (11), wherein an electrical connector (13) of the sensor chip (11) penetrates the connecting pipe (12) and is extended out from the other end of the connecting pipe (12), and wherein an encapsulation layer (4) is provided between the inner shell (2) and the sensor chip (11), and wherein a gap between the sensor chip (11) and the inner shell (2) and a notch of the mounting cavity (21) are filled and sealed.
2. The packaging structure according to claim 1, characterized in that: An anti-interference layer (5) is provided between the sensor chip (11) and the inner shell (2), and the anti-interference layer (5) is located inside the packaging layer (4).
3. The packaging structure according to claim 2, characterized in that: The anti-interference layer (5) comprises copper foil.
4. The packaging structure according to claim 2, characterized in that: Positioning portions (25) are respectively arranged on the two wall surfaces of the installation cavity (21) facing the front and back sides of the sensor chip (11); along the assembly direction, the positioning portions (25) are provided with insertion seams (26) for facilitating the insertion of the anti-interference layer (5); the thickness of the insertion seams (26) is greater than or equal to the thickness of the anti-interference layer (5).
5. The packaging structure according to claim 1, characterized in that: A card slot (24) adapted to the sensor chip (11) is arranged in the installation cavity (21); two card slots (24) are arranged on two side walls of the installation cavity (21) along the assembly direction; two sides of the sensor chip (11) are embedded in the card slots (24) on both sides.
6. The packaging structure according to any one of claims 1 to 5, characterized in that: It also comprises an outer shell (3), the outer shell (3) being sleeved outside the inner shell (2), and the connecting pipe (12) passing through the outer shell (3).
7. The packaging structure according to claim 6, characterized in that: The outer surface of the inner shell (2) is provided with a plurality of positioning members (22), the inner wall of the outer shell (3) is provided with a plurality of positioning matching parts (31) matching with the positioning members (22), and the positioning members (22) of the inner shell (2) are connected with the positioning matching parts (31) of the outer shell (3).
8. The packaging structure according to claim 7, characterized in that: The positioning piece (22) is a protrusion, and the positioning matching portion (31) is a through hole.
9. The packaging structure according to claim 7, characterized in that: The housing (3) is a split structure or an integrated structure.
10. The packaging structure according to claim 7, characterized in that: The housing (3) is an integral structure formed by injection molding.