Elastic strap connecting structure and auxiliary holding device for electronic mobile terminal

Abstract

Disclosed in the present invention are an elastic strap connecting structure and an auxiliary holding device for an electronic mobile terminal. The elastic strap connecting structure comprises a base (1), an elastic strap (2), a hole groove (3) and a bolt column (4), or comprises a base (1), an elastic strap (2), a flat cavity (5) and a plug piece (6). The auxiliary holding device for an electronic mobile terminal allows for repeated assembly and disassembly of the elastic strap by means of the elastic strap connecting structure, enabling cleaning, tightness adjustment and replacement operations of the elastic strap to be very convenient, while solving problems encountered when using electronic mobile terminals, such as a small touch area due to single-handed holding, fatigue from holding, and easy slippage, thereby comprehensively improving the comfort, convenience and safety of using electronic mobile terminals.

Description

An elastic shoulder strap connection structure and an auxiliary grip device for electronic mobile terminals Technical Field This invention relates to the field of auxiliary gripping devices for electronic mobile terminals. The electronic mobile terminals include smartphones, tablets, and other handheld electronic mobile terminals for various purposes. Because smartphones are a typical example of electronic mobile terminals, for simplicity and a more vivid description, the term "mobile phone" is used in this specification to refer to electronic mobile terminals. Background Technology and Technical Issues With the widespread use of large-screen mobile phones, mobile phones have become an important part of people's lives and work. However, since mobile phones do not have any auxiliary gripping devices, people are prone to grip fatigue and accidental slippage when holding them for a long time. At the same time, because smartphone screens are large, the effective touch area is small when holding and operating the phone with one hand, often requiring both hands to operate the phone. This can sometimes prevent users from doing other important things at the same time. For example, when people are standing on public transportation and using their mobile phones, they may sometimes lose their balance on the safety handrail while operating the phone with both hands, which may cause them to lose their balance and cause accidents when the vehicle starts, stops, or turns. Existing mobile phone grip aids and technologies can be mainly categorized into three types. The first type is the phone ring holder. This type of holder is attached to the back of the phone and can be worn on the finger when holding the phone. It improves the problem of a small touch area and easy slippage when holding the phone with one hand, and also provides some phone stand functionality, as shown in Figure 1. However, because other fingers are still needed to hold the phone for stability when wearing the ring holder, it limits the flexibility and range of motion of the fingers. Although the effective touch area is improved compared to holding the phone with a bare hand, it still cannot cover the entire screen. Furthermore, wearing the ring holder for extended periods can cause significant pressure and discomfort on the fingers, and it can easily lead to finger injuries under strong external force. The second type is a mobile phone grip device with a non-elastic strap structure. The non-elastic strap is installed on a base on the back of the phone, with one end fixed and the other end movable along a groove within the base, creating an arched space where the user's fingers can fit and move up and down, as shown in Figure 2. This type of device has good anti-slip performance and allows for full-screen touch operation when holding the phone with one hand. However, because the non-elastic strap lacks self-tightening ability, the grip is not snug enough, requiring deliberate gripping in some scenarios. Furthermore, this type of device is generally installed on a non-center position on the back of the phone, leading to poor comfort when switching between left and right hands, and is not suitable for functioning as a phone stand. The third type is a mobile phone grip aid with an elastic strap structure. The elastic strap is fixed to both ends of the base on the back of the phone, allowing the user's fingers to move up and down while holding the phone with one hand, enabling full-screen touch operation, as shown in Figure 3. Because the elastic strap provides a certain degree of self-tightening elasticity, it offers a comfortable grip and excellent anti-slip performance without requiring conscious effort to hold the phone. However, after a period of use, the elastic strap will inevitably experience elasticity loss and permanent stretching. Furthermore, since elastic straps are generally made of woven fibers, they easily absorb sweat, dust, and other dirt, causing them to become increasingly dirty over time. Because the strap-type mobile phone grip device is attached to the back of the phone, it needs to be relatively thin for aesthetic and portability considerations. This often makes conventional detachable designs difficult. Therefore, traditional products typically use adhesive bonding, riveting, or screws (including screws) to attach the elastic strap to the base on the back of the phone. While adhesive bonding and riveting are simpler in structure and process, they prevent the elastic strap from being removed, hindering cleaning, tension adjustment, or replacement. Screw fixing, although allowing for installation and maintenance with a screwdriver, usually results in the elastic strap being taut during installation, making screw installation difficult. Furthermore, the frequent maintenance (cleaning and tension adjustment) of the elastic strap requires frequent screw removal, leading to inconvenience and potential damage to the threads of the screws or base. These drawbacks negatively impact the user experience and widespread adoption of such products. Technical solutions This invention aims to provide an auxiliary grip device for electronic mobile terminals that allows for convenient maintenance of the elastic shoulder strap. It proposes two technical solutions for removable and detachable elastic shoulder strap connection structures, thereby solving the problems of hygiene and cleaning, loosening and maintenance, and the inability or unsuitability for frequent attachment and removal (including attachment and removal at one or both ends) of the elastic shoulder strap. This addresses issues encountered when using mobile phones, such as fatigue during grip, easy slippage, and small touch area for single-handed use. Furthermore, this invention can be well integrated with existing rectangular mobile phone holder technology, comprehensively improving the comfort, convenience, and safety of mobile phone use. This invention proposes two reusable elastic shoulder strap connection structures, namely elastic shoulder strap connection structure example 1 and elastic shoulder strap connection structure example 2. Both of these elastic shoulder strap connection structures have the advantages of simple structure and quick manual assembly and disassembly, while each has its own characteristics. They can be used alone or in combination with each other, or in combination with other traditional elastic shoulder strap connection structures. Both the elastic shoulder strap connection structure example 1 and the elastic shoulder strap connection structure example 2 contain two basic components: a base 1 and an elastic shoulder strap 2. The base 1 is generally a rectangular plate and is pasted on the back of the phone, or it can be integrated with the phone back cover or phone case. The main technical features of Example 1 of the elastic shoulder strap connection structure are as follows: A narrow-opening transverse groove 3 is present at one end of the base 1, and a bolt 4 is fabricated at the end of the elastic shoulder strap. The bolt 4 at the end of the elastic shoulder strap is inserted laterally into the groove 3 of the base 1 using an interference fit. Because the assembly direction of the bolt 4 is perpendicular to the working force direction of the elastic shoulder strap 2, only a small interference fit is required between the bolt 4 and the groove 3 to form a reliable assembly connection between the elastic shoulder strap 2 and the base 1. This small interference fit also makes the loading and unloading process of the elastic shoulder strap very convenient. The main technical features of Example 2 of the elastic shoulder strap connection structure are as follows: A flat cavity 5 is located at one end of the base 1. The elastic shoulder strap 2, along with a appropriately sized insert 6, is installed into the flat cavity 5 of the base using an interference fit, generating strong static friction between the elastic shoulder strap 2 and the inner wall of the flat cavity 5. When this static friction is much greater than the normal working tensile force of the elastic shoulder strap, a reliable assembly connection can be formed. Attached Figure Description Figure 1 is a schematic diagram of the existing ring buckle and side support. Figure 2 is a schematic diagram of the use of an existing non-elastic strap-type mobile phone auxiliary grip device. Figure 3 is a schematic diagram of the use of an existing flexible strap-type mobile phone auxiliary grip device. Figure 4 is a schematic diagram of Example 1 of the elastic strap connection structure in this invention. Figure 5 is a schematic diagram of Example 2 of the elastic shoulder strap connection structure in this invention. Figure 6 is a schematic diagram of the flat cavity in Example 2 of the elastic strap connection structure of the present invention. Figure 7 is a schematic diagram of another assembly method of the elastic shoulder strap connection structure example 2 in this invention. Figure 8 is a schematic diagram of a mobile phone auxiliary gripping device composed of an elastic back strap connection structure example 1 and an elastic back strap connection structure example 2. Figure 9 is a schematic diagram of a mobile phone auxiliary gripping device composed of two elastic back strap connection structures (Example 1). Figure 10 is a schematic diagram of a mobile phone auxiliary gripping device composed of two elastic back strap connection structures, Example 2. Figure 11 is a schematic diagram of a mobile phone auxiliary gripping device composed of an elastic back strap connection structure example 1 and an elastic back strap connection structure with a conventional screw fixing method. Figure 12 is a schematic diagram of a mobile phone auxiliary gripping device composed of an elastic back strap connection structure example 2 and an elastic back strap connection structure with a conventional screw fixing method. Figure 13 is a schematic diagram of a mobile phone auxiliary gripping device composed of an elastic back strap connection structure example 2 and an elastic back strap connection structure with a traditional adhesive fixing method. Figure 14 is a schematic diagram of the side support of a mobile phone after combining the present invention with existing rectangular mobile phone bracket technology, and a schematic diagram of the anti-detachment protection effect of the rectangular vertical bracket frame on the elastic strap connection structure in the present invention when it is in the closed state. Figure 15 is a schematic diagram of the vertical support of a mobile phone after combining the present invention with existing rectangular mobile phone bracket technology, and a schematic diagram of the anti-detachment protection effect of the rectangular side support frame on the elastic back strap connection structure in the present invention when it is in the closed state. Detailed Implementation Plan The technical embodiments of the present invention will be further described below with reference to the accompanying drawings. Example 1 of elastic shoulder strap connection structure: It includes a base 1, an elastic shoulder strap 2, a hole groove 3 and a bolt 4, and its structure is shown in Figure 4. The slot 3 is located at one end of the base 1. It is a transverse slot with a narrow opening, and its opening width is significantly smaller than the maximum cross-sectional width of the slot 3. The anchor 4 is a column-shaped object made at the end of the elastic strap. The cross-sectional shapes of the slot 3 and the bolt 4 are matched, and there are many different implementation methods. For the sake of simplicity, this specification only describes the circular cross-section as an example. The bolt 4 is fitted laterally into the slot 3 from the base 1 using an appropriate interference fit, while the elastic strap 2 passes through the narrow opening of the slot 3. Because the width of the narrow opening of the slot 3 is much smaller than the cross-sectional width of the bolt 4, even if the strap 2 is subjected to a large tensile force in the length direction, the bolt 4 will not come out of the narrow opening of the slot 3. When worn and used normally, the elastic shoulder strap 2 generally only bears a small working tensile force in the length direction, and there is almost no additional force in the lateral installation direction of the bolt 4. Therefore, only a small interference fit is required between the slot 3 and the bolt 4 to reliably install the elastic shoulder strap 2 on the base 1. When the elastic shoulder strap 2 needs to be removed from the base 1, the elastic shoulder strap 2 and the anchor post 4 can be removed from the slot 3 by simply applying appropriate lateral tension by hand at the shoulder strap connection. The advantage of the elastic shoulder strap connection structure example 1 is its simple structure and the ability to quickly complete the disassembly and assembly process by hand. Example 2 of elastic shoulder strap connection structure: It includes a base 1, an elastic shoulder strap 2, a flat cavity 5 and a plug 6, as shown in Figure 5. The flat cavity 5 is located at one end of the base 1 and has a relatively long cavity depth, as shown in Figure 6. It can be used to accommodate the elastic back strap 2 and the plug 6. The elastic shoulder strap 2 and the insert 6 are assembled into the flat cavity 5 by an interference fit. By selecting an insert 6 of appropriate thickness and length, the elastic shoulder strap 2 can generate a high static friction force in the flat cavity 5, while the elastic shoulder strap 2 only needs to withstand a small working tensile force during normal wear and use. Because the elastic strap 2 has the characteristic of absorbing and mitigating instantaneous overload tension, and the plug 6 has a relatively long insertion depth, the elastic strap 2 and the plug 6 can only be completely pulled out of the flat cavity 5 when pulled continuously and forcefully backward. Furthermore, since the elastic strap 2 covers the outside of the plug 6, and the direction of the working tension that the elastic strap 2 bears during normal use is approximately opposite to the direction of plug 6's dislodgement, the elastic strap 2 has the function of preventing the plug 6 from dislodging from the flat cavity 5, as shown in Figure 8. Therefore, the elastic strap connection structure example 2 described in this invention has high installation reliability. When the elastic shoulder strap 2 becomes dirty or loose due to prolonged use and requires maintenance, it can be pulled back forcefully. Then, it can be cleaned, its tightness adjusted (including shortening), or replaced as needed. Reassembly will restore its functionality. When the elastic shoulder strap 2 is only slightly loose, disassembly is not even necessary. Simply push the insert 6 deeper into the flat cavity 5 to quickly adjust its tightness. In addition, the elastic shoulder strap 2 and the plug 6 can also be assembled in the flat cavity 5 in the manner shown in Figure 7. Users can choose the installation method of the elastic shoulder strap shown in Figure 5 or Figure 7. Application Examples The elastic shoulder strap connection structure examples 1 and 2 described in this invention can be used alone or in combination with each other, or in combination with other traditional elastic shoulder strap connection structures (such as screw fixing and adhesive fixing methods) to form various forms of mobile phone auxiliary grip devices as shown in Figures 8, 9, 10, 11, 12 and 13. Figure 8 shows a mobile phone auxiliary grip device composed of an example of an elastic shoulder strap connection structure 1 and an example of an elastic shoulder strap connection structure 2. Its feature is that the installation, removal and tension adjustment of the elastic shoulder strap can be carried out very conveniently. Figure 9 shows a mobile phone auxiliary grip device composed of two elastic back strap connection structures (Example 1). Its feature is that the elastic back strap is very easy to install and remove, but it does not have a tightness adjustment function and the elastic back strap needs to be replaced regularly. It is suitable for users who are not sensitive to the cost of replacing the elastic back strap. Figure 10 shows a mobile phone auxiliary grip device composed of two elastic back strap connection structures (Example 2). Its feature is that the elastic back strap tension adjustment and loading / unloading operations are very convenient, but it occupies a lot of internal space of the base, which may affect the other functional designs of the mobile phone auxiliary grip device. Figure 11 shows a mobile phone auxiliary grip device composed of an elastic back strap connection structure example 1 and an elastic back strap connection structure fixed by a traditional screw. Its characteristic is that daily cleaning and maintenance of the elastic back strap only requires removing and attaching one end of the elastic back strap connection structure example 1. In practical applications, the vast majority of smartphone users (approximately 95%, based on field surveys in crowded public places) use phone cases to protect their phones from drops. Therefore, the mobile phone auxiliary grip device described in this invention is mostly attached to the back of phone cases. When the elastic back strap needs cleaning and maintenance due to hygiene issues (approximately once every 1-2 weeks, the specific frequency depending on the user's emphasis on hygiene), the phone case can be removed first, and then one end of the elastic back strap connection structure example 1 can be detached to a free state, allowing for unobstructed cleaning of the elastic back strap. Therefore, the cleaning and maintenance process of the elastic back strap is also very convenient. Furthermore, since the elastic shoulder strap relaxes very slowly, adjusting its tension (approximately once every 1-2 months) is a low-frequency, non-urgent task. Users can choose an appropriate time to use a screwdriver or other tools to install, remove, and adjust the tension of the elastic shoulder strap. During installation, the screw side can be installed first with the elastic shoulder strap relaxed, and then the installation of the elastic shoulder strap connection structure example 1 can be completed by hand. This eliminates the adverse effects of a tense elastic shoulder strap on screw installation. In addition, daily cleaning and maintenance of the elastic shoulder strap only requires disassembling one end of the elastic shoulder strap connection structure example 1, significantly reducing the number of times the fixing screws are installed and removed, thus greatly reducing the possibility of thread damage to the screws or base. Therefore, the technical combination implementation scheme of the elastic shoulder strap connection structure example 1 and the traditional screw-fixed elastic shoulder strap connection structure also possesses the ability to clean, maintain, adjust, and replace the elastic shoulder strap, and the convenience and service life of these maintenance operations are far superior to traditional elastic shoulder strap auxiliary grip devices. Figure 12 shows a mobile phone gripping device composed of an elastic strap connection structure example 2 and an elastic strap connection structure with a conventional screw fixing method. (See the instruction manual...)

[0047] As described in this section, most mobile phone grip devices are attached to the back of the phone case. When cleaning the elastic strap, the phone case can be removed first, and then one side of the elastic strap connection structure example 2 can be detached to a free state, allowing for unobstructed cleaning. Therefore, the cleaning and maintenance process of the elastic strap is also very convenient. Furthermore, because the elastic strap connection structure example 2 has excellent manual installation and removal capabilities and the ability to adjust the elastic strap's tightness, it also provides convenient maintenance capabilities for adjusting the elastic strap's tightness. Although a screwdriver is needed to install or remove the other end of the elastic strap when replacing it, with proper maintenance, the elastic strap's functional lifespan can reach approximately two years, requiring very few replacements and not affecting daily use. Therefore, the technical combination of the elastic strap connection structure example 2 and the traditional screw-fixed elastic strap connection structure also provides the capabilities for cleaning, adjusting, and replacing the elastic strap, and the convenience and lifespan of these maintenance operations are far superior to traditional elastic strap grip devices. Figure 13 shows a mobile phone auxiliary grip device composed of an elastic back strap connection structure example 2 and an elastic back strap connection structure with a conventional adhesive fixing method. (See the instruction manual...)

[0047] As described in this paragraph, most mobile phone grip assist devices are attached to the back of the mobile phone case. When cleaning the elastic strap, the mobile phone case can be removed first, and then one side of the elastic strap connection structure example 2 can be detached to a free state, allowing for unobstructed cleaning of the elastic strap. Therefore, the cleaning and maintenance process of the elastic strap is also very convenient. At the same time, because the elastic strap connection structure example 2 has excellent manual installation and removal performance and the ability to adjust the tightness of the elastic strap, it also has the convenient maintenance capability to adjust the tightness of the elastic strap. Although one end of the elastic strap cannot be replaced due to the permanent adhesive fixing method, the functional service life of the elastic strap can reach about 2 years under normal maintenance. Its service life is still much longer than that of traditional elastic strap grip assist devices, and it can be launched on the market as a low-end product to meet the needs of price-sensitive users. In comparison, Figure 8 shows a combination implementation scheme with better overall performance, while Figures 9, 10, 11, 12, and 13 show combination implementation schemes with slightly inferior overall performance. However, their maintainability is still significantly better than that of traditional non-removable or fully screw-fixed strap-type mobile phone auxiliary grip devices. The mobile phone auxiliary grip device described in this invention can also be combined with existing mobile phone rectangular bracket technology to form a strap-type mobile phone auxiliary grip device with bracket function, as shown in Figures 14 and 15. In Figures 14 and 15, the rectangular bracket 7 can not only be used for side or vertical support of the mobile phone when open, but also provides additional anti-slip protection for the elastic strap connection structure example 1 or elastic strap connection structure example 2 described in this invention when the bracket is closed. Beneficial effects The mobile phone auxiliary grip device described in this invention utilizes a self-tightening elastic strap, providing a comfortable and snug grip. It offers strong anti-slip performance without requiring deliberate gripping of the phone and allows for one-handed full-screen touch control. Furthermore, the elastic strap employs a removable and reassembleable design, allowing users to clean and adjust its tightness as needed. Some implementation schemes also allow for strap replacement, resulting in a long service life. In addition, this invention can be combined with existing rectangular mobile phone holder technology, broadening its functionality and comprehensively improving the comfort, convenience, and safety of mobile phone use, thus possessing broad application prospects and social benefits.

Claims

1. An elastic shoulder strap connection structure, characterized in that: It includes a base (1), an elastic shoulder strap (2), a slot (3), and a pin (4); the base (1) is attached to the back of the electronic mobile terminal; the slot (3) is a transverse slot with a narrow opening made on the base (1); the pin (4) is made at the end of the elastic shoulder strap (2), and the pin (4) is laterally fitted into the slot (3) of the base (1) by an interference fit, and can be repeatedly installed and removed.

2. An elastic shoulder strap connection structure, characterized in that: It includes a base (1), an elastic shoulder strap (2), a flat cavity (5), and a plug (6); the base (1) is attached to the back of the electronic mobile terminal; the flat cavity (5) is made at one end of the base (1); the elastic shoulder strap (2) and the plug (6) cooperate with each other and are installed in the flat cavity (5) of the base (1) by interference fit, and can be repeatedly installed and removed.

3. An auxiliary gripping device for an electronic mobile terminal, characterized in that: It includes an elastic shoulder strap connection structure as described in claim 1 and an elastic shoulder strap connection structure as described in claim 2.

4. An auxiliary gripping device for an electronic mobile terminal, characterized in that: It includes two elastic strap connection structures as described in claim 1.

5. An auxiliary gripping device for an electronic mobile terminal, characterized in that: It includes an elastic strap connection structure as described in two claims 2.

6. An auxiliary gripping device for an electronic mobile terminal, characterized in that: It includes an elastic shoulder strap connection structure as described in claim 1 and an elastic shoulder strap connection structure fixed by a screw.

7. An auxiliary gripping device for an electronic mobile terminal, characterized in that: It includes an elastic shoulder strap connection structure as described in claim 2 and an elastic shoulder strap connection structure fixed by a screw.

8. An auxiliary gripping device for an electronic mobile terminal, characterized in that: The elastic shoulder strap connection structure includes one elastic shoulder strap connection structure as described in claim 2 and an elastic shoulder strap connection structure with an adhesive fixing method.

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