阅读说明：本技术 一种多个金属屏蔽电连接器的快速连接系统及方法 (Rapid connection system and method for multiple metal shielding electric connectors ) 是由 罗俊辉 阳禩乾 徐勇 程志能 于 2021-08-19 设计创作，主要内容包括：本发明公开了一种多个金属屏蔽电连接器的快速连接系统及方法,包括推拉式电连接器、限位支架及快插拔板,所述限位支架上设有限位部限制携行作业设备偏移,其一端还设有电连接器插头固定板；所述推拉式电连接器包括电连接器插头、电连接器插座及电连接器锁扣,其中电连接器插座设于携行作业设备一端,电连接器插头设于电连接器插头固定板上,通过将行作业设备推入限位支架使电连接器插头电连接器插座实现精准对接；所述快插拔板上设有卡槽对电连接器锁扣限位,推动快插拔板位移时,卡槽带动电连接器锁扣轴向位移进行解锁,使电连接器插头插入电连接器插座后进行锁定连接,或拔出电连接器插座断开连接,实现了多个推拉式电连接器的快速拔插。(The invention discloses a quick connection system and a quick connection method of a plurality of metal shielding electric connectors, wherein the quick connection system comprises a push-pull type electric connector, a limiting bracket and a quick plug-pull plate, wherein the limiting bracket is provided with a limiting part for limiting the deviation of portable operation equipment, and one end of the limiting bracket is also provided with an electric connector plug fixing plate; the push-pull type electric connector comprises an electric connector plug, an electric connector socket and an electric connector lock catch, wherein the electric connector socket is arranged at one end of the portable operation equipment, the electric connector plug is arranged on the electric connector plug fixing plate, and the electric connector plug and the electric connector socket are accurately butted by pushing the portable operation equipment into the limiting bracket; the quick plugging plate is provided with a clamping groove for limiting the lock catch of the electric connector, when the quick plugging plate is pushed to move, the clamping groove drives the lock catch of the electric connector to move axially to unlock, so that the plug of the electric connector is locked and connected after being plugged into the socket of the electric connector, or the socket of the electric connector is pulled out to be disconnected, and the quick plugging of a plurality of push-pull electric connectors is realized.)

1. A quick connect system for a plurality of metal shielded electrical connectors, comprising:

the limiting device comprises a limiting bracket (1), wherein two sides of the limiting bracket (1) are provided with limiting parts (11), and one end of the limiting bracket (1) is also provided with an electric connector plug fixing plate (7) and a rotating shaft fixing seat (6);

the push-pull type electric connector (3) comprises an electric connector plug (32) arranged on the electric connector plug fixing plate (7), an electric connector socket (31) arranged on the portable operation equipment (2) and an electric connector lock catch (33) arranged on the electric connector socket (31);

one end of the quick plug-pull plate (5) is connected with a rotating shaft fixing seat (6) arranged on the limiting support (1), a clamping groove (9) is arranged on the quick plug-pull plate (5), and the clamping groove (9) is clamped on two sides of the electric connector socket (31) to limit the electric connector lock catch (33);

the portable operation equipment (2) enters the limiting support (1) and is limited through the limiting portion (11), the electric connector plug (32) and the electric connector socket (31) are precisely butted, the quick insertion and pulling plate (5) is pushed, the clamping groove (9) drives the electric connector lock catch (33) to unlock along the axial displacement of the electric connector socket (31), the electric connector plug (32) is inserted into the electric connector socket (31), the electric connector lock catch (33) resets to lock and connect, when the connection is disconnected, the quick insertion and pulling plate (5) is pushed again to unlock, the portable operation equipment (2) is pulled out, and the quick deployment of a plurality of push-pull electric connectors is realized.

2. The system for quickly connecting multiple metal shielded electrical connectors according to claim 1, wherein the quick-plug board (5) has an L-shaped structure and comprises an upper horizontal plate (51), a lower board (52) perpendicular to the upper horizontal plate (51), and a rotating shaft (4) disposed at the bottom of the lower board (52).

3. The system for quickly connecting a plurality of metal shielded electrical connectors according to claim 2, wherein the rotating shaft (4) is disposed on a rotating shaft fixing seat (6) which can drive the quick-plug board (5) to move radially around the rotating shaft (4).

4. The quick connect system of multiple metal shielded electrical connectors as claimed in claim 2, wherein said lower support plate (52) is provided with multiple card slots (9), said card slots (9) being accessible through electrical connector plug receptacles (31) and having a width smaller than the outer diameter of the electrical connector latches (33).

5. Quick connect system for multiple metal shielded electrical connectors according to any of claims 1-4, characterized in that the electrical connector plug (32) is fixed to the electrical connector plug fixing plate (7) by means of a flange (8), and the electrical connector socket (31) is embedded in the portable working device (2) by means of the flange (8), both being provided in equal number.

6. Quick connect system for multiple metal shielded electrical connectors according to claim 1, characterized in that the rotating shaft holder (6) is provided with an electric motor inside.

7. A method of quickly connecting a plurality of metal shielded electrical connectors, comprising the steps of:

s100: pushing one end of the portable operation equipment (2) provided with the electric connector socket (31) into the limiting bracket (1);

s200: after the limiting part (11) limits the portable operation equipment (2), the electric connector socket (31) penetrates through the clamping groove (9) to be precisely butted with the electric connector plug (32);

s300: the upper transverse plate (51) is pulled, the quick plug-pull plate (5) moves backwards in the radial direction by taking the rotating shaft (4) as a fulcrum, and the clamping groove (9) drives the electric connector lock catches (33) to move backwards synchronously for unlocking;

s400: the electric connector plug (32) is inserted into the electric connector socket (31), the electric connector lock catch (33) returns to the original position and is locked, and the portable operation equipment (2) and the vehicle-mounted equipment start communication operation;

s500: the upper transverse plate (51) is pulled, the quick plug-pull plate (5) moves backwards in the radial direction by taking the rotating shaft (4) as a fulcrum, and the clamping groove (9) drives the electric connector lock catches (33) to move backwards synchronously for unlocking;

s600: the portable operation equipment (2) is pulled out, and the connection is disconnected to carry out the transfer operation.

Technical Field

The invention belongs to the field of electric signal connecting devices, and particularly relates to a quick connecting system and a quick connecting method for a plurality of metal shielding electric connectors.

Background

Modern combat, quick motor is a key index, and the two kinds of application modes of on-vehicle and getting off the bus need be satisfied to most of portable operation equipment, when need connect various external device on the car, carries and communicates through the connection of corresponding electric connector plug and socket between portable operation equipment and the automobile body, accomplishes uploading of various finger control instruction and issues, when needs get off the bus operation, just needs quick disconnect-type, dismantles portable operation equipment, reaches quick deployment, quick motor-driven purpose.

In the prior art, a metal shielding electric connector generally adopts a bayonet, threaded, snap-lock, push-pull and direct-insertion type electric connector structure, for example, patent document CN 112290300a discloses an emergency power supply quick connection electric connector structure, which comprises a shell and a contact pin arranged in the shell, wherein the shell is arranged in a T shape and comprises a square fixed block and a cylindrical connecting block; one end of the contact pin is fixedly connected with the fixed block, and the other end of the contact pin is arranged in the connecting block and forms a cylindrical insertion space with the connecting block; the contact pin is provided with a threaded hole for realizing butt joint and locking of the headstock; the contact pin is kept away from fixed block pot head and is equipped with contact pin direction awl, contact pin direction awl is the round platform form, and the centre is provided with and supplies contact pin male hole, is provided with between the inner wall in hole and the outer wall of contact pin to realize contact pin and contact pin direction awl interference fit and anti-disengaging's barb structure. However, this patent simply addresses the mounting problem of a single electrical connector, which is also electrical in nature. Patent document CN112292231A discloses an electrical connector mounting tool, which has a structure including: a connector installation tool includes an elongated body, a handle, a battery, and a C-shaped tool head. The elongated body includes a first end, a second end, and an axis extending between the first end and the second end. The handle includes a switch and is positioned proximate to the first end. The switch is movable between a first position and a second position. The battery is supported on the body and is configured to provide power to an actuator when the switch is in the first position. The C-shaped tool head is positioned proximate to the second end. The C-shaped tool head includes a stop surface and a ram, and the ram may extend toward the stop surface. But this patent only addresses the installation of a single electrical connector. Therefore, the traditional electric connector can solve the problem that a single electric connector is quickly plugged, but the existing communication equipment is generally provided with a plurality of external communication interfaces, a plurality of electric connectors are adopted for communication connection, the prior art cannot realize the simultaneous quick plugging and unplugging of the plurality of electric connectors, and the plurality of electric connectors are manually plugged and unplugged one by one, so that the operation efficiency is reduced, and the purposes of quick deployment and quick maneuvering of the portable operation equipment in wartime are not facilitated.

Disclosure of Invention

Aiming at the defect that the prior art can not realize the simultaneous quick plugging of a plurality of electric connectors, the invention provides a quick connection system and a method of a plurality of metal shielding electric connectors.

The invention provides a quick connection system and a quick connection method for a plurality of metal shielding electric connectors, wherein the quick connection system comprises a limiting bracket, wherein two sides of the limiting bracket are provided with limiting parts, and one end of the limiting bracket is also provided with an electric connector plug fixing plate and a rotating shaft fixing seat; the push-pull type electric connector comprises an electric connector plug arranged on the electric connector plug fixing plate, an electric connector socket arranged on the portable operation equipment and an electric connector lock catch arranged on the electric connector socket; one end of the quick plugging plate is connected with a rotating shaft fixing seat arranged on the limiting bracket, a clamping groove is arranged on the quick plugging plate, and the clamping groove is clamped on two sides of the electric connector socket to limit the electric connector lock catch; the portable operation equipment enters the limiting support and is limited by the limiting portion, so that an electric connector plug and an electric connector socket are accurately butted, the quick-insertion and pulling plate is pushed, the clamping groove drives the electric connector lock catch to unlock along the axial displacement of the electric connector socket, after the electric connector plug is inserted into the electric connector socket, the electric connector lock catch resets to lock and connect, and when the electric connector is disconnected, the quick-insertion and pulling plate is pushed again to unlock, the portable operation equipment is pulled out, and the quick deployment of a plurality of push-pull electric connectors is realized.

Furthermore, the quick plug-pull plate is of an L-shaped structure and comprises an upper transverse plate, a lower support plate perpendicular to the upper transverse plate and a rotating shaft arranged at the bottom of the lower support plate.

Furthermore, the rotating shaft is arranged on the rotating shaft fixing seat and can drive the quick insertion and extraction plate to radially move around the rotating shaft.

Furthermore, a plurality of clamping grooves are formed in the lower support plate, the clamping grooves can pass through the plug and the socket of the electric connector, and the width of the clamping grooves is smaller than the outer diameter of the lock catch of the electric connector.

Furthermore, the electric connector plug is fixed on the electric connector plug fixing plate through a flange, and the electric connector socket is embedded in the portable operation equipment through the flange and is provided with the same number of the electric connector plug and the portable operation equipment.

Preferably, a motor is arranged in the rotating shaft fixing seat.

Further, the present invention provides a method for quickly connecting a plurality of metal shielded electrical connectors, which is characterized by comprising the following steps:

s100: pushing one end of the portable operation equipment, which is provided with the electric connector socket, into the limiting bracket;

s200: after the limiting part limits the portable operation equipment, the electric connector socket passes through the clamping groove to be precisely butted with the electric connector plug;

s300: pulling the upper transverse plate, radially moving the quick plug-pull plate backwards by taking the rotating shaft as a fulcrum, and driving the lock catches of the plurality of electric connectors to synchronously move backwards to unlock the electric connectors by the clamping grooves;

s400: the electric connector plug is inserted into the electric connector socket, the electric connector lock catch returns to the original position and locks, and the portable operation equipment and the vehicle-mounted equipment start communication operation;

s500: pulling the upper transverse plate, radially moving the quick plug-pull plate backwards by taking the rotating shaft as a fulcrum, and driving the lock catches of the plurality of electric connectors to synchronously move backwards to unlock the electric connectors by the clamping grooves;

s600: and pulling out the portable operation equipment, and disconnecting the portable operation equipment to perform transfer operation.

In general, compared with the prior art, the above technical solution contemplated by the present invention can achieve the following beneficial effects:

1. according to the quick connection system of the plurality of metal shielding electric connectors, the deviation of the portable operation equipment is limited by additionally arranging the limiting part, the electric connector plug fixing plate is additionally arranged to enable the electric connector plug to be accurately butted with the electric connector socket arranged on the portable operation equipment, and the electric connector lock catch arranged on the electric connector socket is unlocked by the rotating shaft fixing seat and the rotating shaft driving the quick plugging and unplugging plate, so that the quick plugging of the plurality of push-pull electric connectors is realized, and the purposes of quick deployment and quick maneuvering are achieved.

2. According to the quick connection system of the plurality of metal shielding electric connectors, the push-pull type electric connectors are adopted, when the auxiliary device for synchronous quick plug-in and pull-out fails, the electric connectors can be manually pushed to the unlocking positions for unlocking, the maintainability and the dismounting performance of original equipment are not influenced, the fault-tolerant rate of vehicle-mounted equipment is increased, and the adaptability to the battlefield environment is good.

3. According to the quick connection system of the plurality of metal shielding electric connectors, the operation efficiency of an operator in a vehicle is further improved by arranging the motor, the operator can control the motor to rotate and unlock by one key, and the quick insertion and extraction plate does not need to be pushed manually to unlock, pull and insert.

4. The invention is modified on the original vehicle-mounted equipment and additionally provided with the auxiliary device, has simple structure, does not change the structure of the existing equipment, saves the production cost and shortens the development period.

Drawings

Fig. 1 is a schematic structural diagram of a quick connection system for a plurality of metal shielded electrical connectors according to an embodiment of the present invention;

FIG. 2 is a side view of a quick connect system in an embodiment of the present invention;

FIG. 3 is a schematic diagram of a push-pull electrical connector and a quick-connect/disconnect board according to an embodiment of the present invention;

FIG. 4 is a schematic view of an embodiment of a fixing plate of an electrical connector plug;

FIG. 5 is a schematic diagram of a fast-plugging board structure according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of the operation of fixing and unlocking the push-pull electrical connector according to the embodiment of the present invention;

fig. 7 is a flow chart illustrating a method for quickly connecting a plurality of metal-shielded electrical connectors according to an embodiment of the present invention.

In all the figures, the same reference numerals denote the same features, in particular: the device comprises a 1-limiting bracket, a 11-limiting part 11, a 2-portable operation device, a 3-push-pull type electric connector, a 31-electric connector socket, a 32-electric connector plug, a 33-electric connector lock catch, a 4-rotating shaft, a 5-quick plug-pull plate, a 51-upper transverse plate, a 52-lower support plate, a 6-rotating shaft fixing seat, a 7-electric connector plug fixing plate, an 8-flange and a 9-clamping groove.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the embodiments described herein are merely illustrative and are not intended to limit the present invention to portable work equipment. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Referring to fig. 1-6, the present invention provides a system and a method for quickly connecting a plurality of metal shielded electrical connectors, which can simultaneously perform a docking insertion or a pulling disconnection operation on an electrical connector plug 32 and an electrical connector plug and socket 31 of a plurality of push-pull electrical connectors 3, and comprises a portable operation device 2 having a plurality of electrical connector plug and socket 31 at one end thereof and an electrical connector plug fixing plate 7 having a plurality of electrical connector plugs 32; furthermore, in order to realize accurate butt joint of the plurality of electric connector sockets 31 and the plurality of electric connector plugs 32, the limiting bracket 1 is arranged to limit the displacement direction of the portable operating equipment 2, so that the portable operating equipment 2 cannot generate lateral displacement when being pushed into or pulled out of the limiting bracket 1, and the electric connector plug fixing plate 7 is arranged at one end of the limiting bracket 1 and is pushed into the portable operating equipment 2, so that the electric connector plugs 32 and the electric connector sockets 31 are accurately butted; further, in order to realize the quick plugging and unplugging of the plurality of electric connector plugs 32 and the electric connector socket 31, the quick plugging and unplugging plate 5 is arranged, a plurality of clamping grooves 9 are arranged on the quick plugging and unplugging plate, the clamping grooves 9 are clamped on two sides of the electric connector socket 3 to limit the electric connector lock catches 33 and push the quick plugging and unplugging plate 5, the clamping grooves 9 drive the electric connector lock catches 33 to move backwards to release the locking state of the electric connector socket 31, the portable operation equipment 2 is pushed to enable the electric connector plugs 32 to be plugged into the electric connector socket 31, at the moment, the electric connector lock catches 33 reset, the electric connector plugs 32 are connected with the electric connector socket 31 in a locking mode, and the next communication operation can be carried out; when the portable operation equipment 2 needs to be pulled out and disconnected, the quick plug and pull plate 5 can be pushed again to release the locking state of the electric connector socket 31, and the electric connection is released. The invention can realize the quick plugging of a plurality of electric connectors, meets the requirement of quick disassembly and assembly of the portable operation equipment 2, and achieves the purposes of quick deployment and quick maneuvering.

The push-pull electric connector 3 adopted by the embodiment of the invention comprises an electric connector plug 32, an electric connector socket 31 and an electric connector lock catch 33; an elastic locking mechanism is arranged in the electric connector socket 31, the initial state of the elastic locking mechanism is a locking state, the electric connector lock catch 33 connected with the electric connector lock catch is pushed to move backwards to an unlocking position along the axial direction of the electric connector socket 31, the electric connector lock catch 33 is locked at the unlocking position, and the elastic locking mechanism releases the locking state; the electric connector socket 32 is provided with a contact pin, after the contact pin is butted and inserted into the electric connector plug 31 in a locking state, the elastic locking mechanism is pushed to reset, the electric connector plug and the elastic locking mechanism are locked and connected, and at the moment, the electric connector lock catch 33 is driven by the elastic locking mechanism to return to the original position.

As shown in fig. 1 to 5, two sides of the limiting bracket 1 are symmetrically provided with limiting portions 11, and when the portable operating device 2 passes through the limiting bracket 1, the limiting portions 11 can limit lateral displacement and vertical displacement thereof, so that the portable operating device 2 is attached to the top of the limiting bracket 1 to maintain linear displacement. The electric connector plug fixing plate 7 is fixedly arranged at one end of the limiting support 1, an electric connector plug 32 is arranged on the electric connector plug fixing plate, the electric connector plug 32 corresponds to the electric connector socket 31 embedded at one end of the carrying operation equipment 2, the electric connector plug and the electric connector socket are axially aligned, and when the carrying operation equipment 2 is pushed to move towards the electric connector plug fixing plate 7, accurate butt joint between the electric connector socket 31 and the electric connector plug 32 can be achieved.

The electric connector plug 32 is fixed on the electric connector plug fixing plate 7 through the flange 8, and the electric connector socket 31 is embedded in the portable operation equipment 2 through the flange 8, and the electric connector plug and the portable operation equipment are the same in number.

The quick plugging and unplugging plate 5 is further arranged on the limiting support 1, is of an L-shaped structure and comprises an upper transverse plate 51 and a lower support plate 52 perpendicular to the upper transverse plate 51, a rotating shaft 4 is further fixedly arranged at the bottom of the lower support plate 52, the rotating shaft 4 is arranged on a rotating shaft fixing seat 6, the rotating shaft fixing seats 6 are provided with two groups, are symmetrically arranged on two sides of the limiting support 1, and can drive the quick plugging and unplugging plate 5 to radially move around the rotating shaft 4 by rotating the rotating shaft 4.

The lower support plate 52 is further provided with a plurality of clamping grooves 9, the electric connector socket 31 can be in butt joint with the electric connector plug 32 through the clamping grooves 9, the width of each clamping groove 9 is smaller than the outer diameter of an electric connector lock catch 33 arranged on the electric connector socket 31, the clamping grooves 9 are clamped on two sides of the electric connector socket 31 to limit the electric connector lock catch 33, the lower support plate 52 is pushed, and the clamping grooves 9 can drive the electric connector lock catch 33 to move backwards to unlock.

As shown in fig. 6, the portable operating device 2 pushes the end provided with the electrical connector socket 31 into the limiting bracket 1, after being limited by the limiting portion 11, the electrical connector socket 31 passes through the slot 9 to be precisely butted with the electrical connector plug 32, the upper horizontal plate 51 is pulled, the quick-insertion-and-extraction plate 5 moves radially backwards by taking the rotating shaft 4 as a fulcrum, the slot 9 drives the plurality of electrical connector latches 33 to synchronously move backwards to unlock, and the elastic locking mechanism arranged in the connector plug 31 after being butted locks the electrical connector plug and the electrical connector plug, so that the communication connection between the portable operating device 2 and the vehicle-mounted device is completed, and various instructions can be uploaded and issued in the next step; when getting off the vehicle, the upper transverse plate 51 is pulled, the quick-insertion and pull-out plate 5 moves radially backwards by taking the rotating shaft 4 as a fulcrum, the clamping groove 9 drives the plurality of electric connector lock catches 33 to move backwards synchronously for unlocking, and meanwhile, the carrying operation equipment 2 is pulled out for transferring operation.

As shown in fig. 7, an embodiment of the present invention provides a method for quickly connecting a plurality of metal shielded electrical connectors, including:

s100: pushing one end of the portable operation equipment 2 provided with the electric connector socket 31 into the limiting bracket 1;

s200: after the limiting part 11 limits the portable operation equipment 2, the electric connector socket 31 passes through the clamping groove 9 to be precisely butted with the electric connector plug 32;

s300: pulling the upper transverse plate 51, moving the quick plug-pull plate 5 radially backwards by taking the rotating shaft 4 as a fulcrum, and driving the plurality of electric connector lock catches 33 to synchronously move backwards by the clamping grooves 9 for unlocking;

s400: the electric connector plug 32 is inserted into the electric connector socket 31, the electric connector lock 33 returns to the original position and is locked, and the portable operation equipment 2 and the vehicle-mounted equipment start communication operation;

s500: pulling the upper transverse plate 51, moving the quick plug-pull plate 5 radially backwards by taking the rotating shaft 4 as a fulcrum, and driving the plurality of electric connector lock catches 33 to synchronously move backwards by the clamping grooves 9 for unlocking;

s600: the portable working equipment 2 is pulled out and disconnected to perform the transfer work.

The quick connection system of the plurality of metal shielding electric connectors can be refitted on the existing support for mounting and fixing the portable operation equipment 2 on the vehicle, the deviation of the portable operation equipment 2 is limited by additionally arranging the limiting part 11, the electric connector plug fixing plate 7 is additionally arranged to enable the electric connector plug 32 to be accurately butted with the electric connector socket 31 arranged on the portable operation equipment 2, the electric connector lock catch 33 arranged on the electric connector socket 31 is unlocked by driving the quick plug-pull plate 5 through the rotating shaft fixing seat 6 and the rotating shaft 4, the quick plug-pull of the plurality of push-pull electric connectors 3 is realized, the additionally arranged parts are few, the quick arrangement of auxiliary devices can be realized through a welding fixing mode, the structure of the existing vehicle-mounted support equipment is not changed, the production cost is reduced, and the development period is shortened.

According to the push-pull type electric connector 3 adopted by the embodiment of the invention, when the auxiliary device for synchronous quick plug-pull is invalid, the electric connector lock catch 33 can be manually pushed to the unlocking position for unlocking, so that the maintainability and the dismounting property of the original equipment are not influenced, the fault-tolerant rate of the vehicle-mounted equipment is increased, and the adaptability to the battlefield environment is good.

In another embodiment of the present invention, a motor is disposed in the rotating shaft fixing seat 6, and is connected to the rotating shaft 4 through a key slot, so as to drive the rotating shaft 4 to rotate. When inserting plug-type electric connector 3, steerable motor drive rotation axis 4 rotates, drives and inserts 5 displacements soon and inserts plug-type electric connector 3 unblocks to pulling out, realizes that a plurality of synchronous of inserting plug-type electric connector 3 pull out soon and insert, has further promoted interior operating personnel's of car operating efficiency through being equipped with the motor, and operating personnel can control the motor rotation unblock by one key, need not again that manual promotion inserts board 5 soon and carries out the unblock and pull out the work of inserting.

In another embodiment of the present invention, two ends of the quick-insertion-and-extraction board 5 may be provided with a slide rail fixedly connected to the limiting bracket 1, and the quick-insertion-and-extraction board 5 may be integrated along the slide rail and may drive the plurality of electric connector latches 33 to move to the unlocking position to unlock the plug-pull electric connector 3.

It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.