CN102463912B - child safety seat - Google Patents

Abstract

The child safety seat comprises a seat and a handle, wherein two sides of the seat are respectively provided with a first coupling piece, and two sides of the handle are respectively provided with a second coupling piece. The handle is pivoted with the two first coupling parts through the two second coupling parts respectively, a plurality of clamping grooves are arranged in the first coupling parts, a sliding groove and a clamping piece are arranged in the second coupling parts, and the clamping piece is slidably arranged in the sliding groove and has a locking position and a releasing position. The surface of the clamping piece facing the first coupling piece is provided with a clamping block, and when the clamping piece is in the locking position, the clamping block of the clamping piece is clamped with the clamping groove to lock the handle. When the engaging piece is in the unlocking position, the engaging block of the engaging piece is separated from the engaging groove, so that the handle can rotate relative to the seat.

Description

child safety seat

【Technical field】

The invention relates to a child safety seat, in particular to a child safety seat with a handle.

【Background technique】

At present, there are many child safety seats with integrated handles on the market. Generally speaking, the handles are equipped with an adjustment mechanism, and through the adjustment mechanism, the user can lock the position of the handle, or unlock the handle to change the position of the handle. attitude. However, the components used in the current adjustment mechanism of the handle are too complicated, so when switching the handle from the locked state to the unlocked state, it needs to go through the interlocking process of multiple components, so the operation is not direct and fast enough. In addition, due to the use of too many components, the weight and manufacturing cost of the handle are also increased.

Therefore, there is a need for a child safety seat that can meet the usage requirements and solve the above-mentioned problems.

【Content of invention】

An object of the present invention is to provide a child safety seat, which includes a seat and a handle. According to one embodiment, there is provided a child safety seat, which is characterized in that it includes: a seat, a first coupling part is provided on both sides of the seat, and several engaging grooves are provided in the first coupling part ; a handle, the two sides of the handle are respectively provided with a second coupling piece, the handle is respectively pivotally connected with the two first coupling pieces through the two second coupling pieces, and a chute is provided in the second coupling piece; and an engaging piece, at least provided with an engaging block, the engaging piece is slid on the chute and can be displaced between a locking position and an unlocking position, when the engaging piece is in the locking position, the The engaging block engages with the engaging slot to lock the handle; when the engaging member is in the unlocking position, the engaging block disengages from the engaging slot so that the handle can rotate relative to the seat.

The above-mentioned child safety seat is characterized in that: the inside of the first coupling part includes a first concave part and a second concave part, and a cylinder protrudes from the center of the first coupling part toward the second coupling part , and the column is provided with a through hole and the column is located between the first recess and the second recess.

The above-mentioned child safety seat is characterized in that first, second and third engagement grooves are respectively provided on the side wall of the first recess along different radial directions, and the side wall of the second recess is along the The fourth, fifth and sixth engaging grooves are respectively provided in different radial directions, wherein the first engaging groove and the fourth engaging groove are located on the same axis, and the second engaging groove and the fifth engaging groove are located on the same axis, and the third engaging groove and the sixth engaging groove are located on the same axis.

The above-mentioned child safety seat is characterized in that: the center of the second coupling part protrudes toward the first coupling part with a shaft body, and the shaft body is inserted into the through hole of the cylinder to form the first coupling part. A pivot between the coupling and the second coupling.

The above-mentioned child safety seat is characterized in that a first engaging block and a second engaging block protrude from the surface of the engaging member facing the first coupling member, and a guide is provided on the engaging member. A guide groove, the guide groove is located between the first engaging block and the second engaging block, the pivot is passed through and can slide in the guide groove.

The above-mentioned child safety seat is characterized in that: there is a spring between the inside of the second coupling part and the engaging part, and the two ends of the spring are respectively fixed to the pivot and the engaging part.

The above-mentioned child safety seat is characterized in that: when the engaging member is at the locking position, the first engaging block and the second engaging block can be respectively engaged in the first engaging groove and the second engaging groove. Four engaging slots are used to lock the handle at a first position.

The above-mentioned child safety seat is characterized in that: when the engaging member is in the locking position, the first engaging block and the second engaging block can be respectively engaged in the second engaging groove and the second engaging groove. Five engaging grooves are used to lock the handle in a second position.

The above-mentioned child safety seat is characterized in that: when the engaging member is at the locking position, the first engaging block and the second engaging block can be respectively engaged in the third engaging groove and the second engaging groove. Six engaging slots are used to lock the handle in a third position.

The above-mentioned child safety seat is characterized in that: another chute and an operation slide cover are provided on the outside of the second coupling part, and the operation slide cover is slidably arranged in the chute outside the second coupling part .

The above-mentioned child safety seat is characterized in that: a pair of engaging projections protrude from the surface of the operation sliding cover to a surface of the second coupling part, and the second coupling part is provided with two slots, and the pair of The locking protrusions are respectively passed through the two slots.

The above-mentioned child safety seat is characterized in that: a first engaging block and a second engaging block protrude from the surface of the engaging member facing the first coupling member, and on the first engaging block There is a guiding groove and two engaging holes between the second engaging block, the two engaging holes are respectively located on both sides of the guiding groove, the pivot is passed through and can slide in the guiding groove , and the pair of engaging protrusions are respectively engaged in the two engaging holes.

The above-mentioned child safety seat is characterized in that a spring is further provided with two ends abutting against the second coupling part and the engaging part respectively.

The above-mentioned child safety seat is characterized in that: when the engaging member is at the locking position, the first engaging block and the second engaging block can be respectively engaged in the first engaging groove and the second engaging groove. Four engaging slots are used to lock the handle at a first position.

The above-mentioned child safety seat is characterized in that: when the engaging member is in the locking position, the first engaging block and the second engaging block can be respectively engaged in the second engaging groove and the second engaging groove. Five engaging grooves are used to lock the handle in a second position.

The above-mentioned child safety seat is characterized in that: when the engaging member is at the locking position, the first engaging block and the second engaging block can be respectively engaged in the third engaging groove and the second engaging groove. Six engaging slots are used to lock the handle in a third position.

【Description of drawings】

FIG. 1 is a perspective view of a child safety seat provided by an embodiment of the present invention.

FIG. 2 is a schematic internal plan view of the first coupling member in FIG. 1 .

FIG. 3 is a schematic diagram of the assembly of the second coupling part and the engaging part of FIG. 1 .

FIG. 4 and FIG. 5 are partial cross-sectional schematic diagrams of the locking member in the locked position and the unlocked position, respectively.

6 and 7 are perspective views of the handle of the child safety seat locked in the second position and the third position, respectively.

FIG. 8 is a perspective view of the child safety seat provided by the second embodiment of the present invention.

FIG. 9 is a perspective view of the handle of FIG. 8 .

FIG. 10 shows a partially enlarged view of FIG. 9 .

11 and 12 are schematic partial cross-sectional views of the locking part of FIG. 10 in the locked position and the unlocked position, respectively.

Child Safety Seat 100

Seat 102 Base 106

Handle 104 Lateral part 104A

Side part 104B, 104C Side stop part 108

Riding part 110 Backrest 112

First coupling 114 Second coupling 116

Fastener 118 Pressing part 118A

First concave part 120 Outer wall 120A

Inner wall 120B Second recess 122

Outer wall 122A Inner wall 122B

Cylinder 124 Perforation 124A

The first engaging groove 126 The second engaging groove 128

The third engagement groove 130 The fourth engagement groove 132

The fifth engaging groove 134 The sixth engaging groove 136

Shaft 138 Chute 140

The first engaging block 142 The second engaging block 144

Contact part 145 Guide groove 146

spring 148

Child Safety Seat 200

Seat 202 Handle 204

Lateral part 204A Side part 204B, 204C

Side block 206 Riding part 208

Backrest 210 The first coupling piece 212

Second coupling member 214 inner wall 214A

Shaft 216 Column 218

The first chute 220 Fastening piece 222

The first engaging block 224 The second engaging block 226

Guide slot 228 Engagement hole 230

Spring 232 Second chute 234

Operating part 236 Engagement bump 238

Grooving 240 First recess 242

Second concave part 244 First engagement groove 246

The second engaging groove 248 The third engaging groove 250

The fourth engaging groove 252 The fifth engaging groove 254

The sixth engagement groove 256

【Detailed ways】

FIG. 1 is a perspective view of a child safety seat 100 provided by an embodiment of the present invention. As shown in FIG. 1 , the child safety seat 100 includes a seat 102 and a handle 104 connected to the left and right sides of the seat 102 . The seat 102 is, for example, an integrally formed plastic shell, and a supporting convex rail 106 is disposed below it. In addition, the left and right sides of the seat 102 are respectively provided with side blocking parts 108 , and a seating part 110 and a backrest 112 located between the side blocking parts 108 . Two first couplers 114 are respectively connected to the two side stoppers 108 for assembling the handle 104 .

The handle 104 includes a transverse portion 104A and two side portions 104B, 104C. The side portions 104B, 104C are respectively connected to the left and right ends of the transverse portion 104A, and the lower ends of the two side portions 104B, 104C are respectively connected to two second couplings. Item 116. The handle 104 is pivotally connected to the first coupling member 114 through the second coupling member 116 , so that the handle 104 can pivot around the pivot Y relative to the seat 102 . In addition, an engaging part 118 is assembled between the first coupling part 114 and the second coupling part 116 for locking the handle 104 at a desired position.

FIG. 2 is a schematic internal plan view of the first coupling member 114 of the child safety seat 100 . The first coupling part 114 is approximately circular and includes a first concave part 120 and a second concave part 122 inside. A cylinder 124 protrudes from the center of the first coupling part 114 toward the second coupling part 116 . The cylinder 124 defines a through hole 124A. The first recess 120 is at least formed between an outer wall 120A and an inner wall 120B, wherein both the outer wall 120A and the inner wall 120B have arc shapes, the inner wall 120B is closer to the cylinder 124, and the outer wall 120A is closer to the cylinder 124 Far. The second recess 122 is also formed between an outer wall 122A and an inner wall 122B, wherein the outer wall 122A and the inner wall 122B both have arc shapes, the inner wall 122B is closer to the cylinder 124, and the outer wall 122A is closer to the cylinder 124. Far. The outer wall 120A of the first recess 120 is respectively provided with a plurality of engaging positions along different radial directions, such as the first, second and third engaging grooves 126, 128, 130, while the inner wall 122B of the second recess 122 has a A plurality of engaging positions, such as fourth, fifth and sixth engaging slots 132 , 134 , and 136 , are respectively provided in different radial directions. The engaging position located in the first recess 120 is corresponding to the engaging position of the second recess 122, for example: the first engaging groove 126 and the fourth engaging groove 132 are located on the same axis x1, the second engaging groove 128 and the fifth engaging groove 128 are located on the same axis x1. The engaging slots 134 are located on the same axis X2, and the third engaging slots 130 and the sixth engaging slots 136 are located on the same axis X3.

FIG. 3 is a schematic diagram of the assembly of the second coupling part 116 and the engaging part 118 . A shaft 138 protrudes from a center of the second coupling member 116 toward the first coupling member 114 . An obliquely extending sliding slot 140 is disposed inside the second coupling member 116 , and the engaging member 118 is slidably disposed in the sliding slot 140 . According to an embodiment, the engaging member 118 has a rectangular shape, for example. A pressing portion 118A can be formed at one end of the engaging member 118 , and the pressing portion 118A can protrude from the second coupling member 116 to facilitate the user to operate the engaging member 118 . A first engaging piece 142 and a second engaging piece 144 protrude from a surface of the engaging piece 118 facing the first coupling piece 114, and the engaging piece 118 is engaged with the second engaging piece 142 on the first engaging piece 142. A guide slot 146 is defined between the blocks 144 . According to an embodiment, the engaging member 118 can further have a protruding abutting portion 145 adjacent to the first engaging block 142 . A spring 148 is also provided between the inside of the second coupling member 116 and the engaging member 118, and the two ends of the spring 148 can abut against the shaft body 138 and a convex rib 149 (shown in dotted line) of the engaging member 118 respectively. .

4 and FIG. 5 are partial cross-sectional schematic views showing the assembly and relative operation of the first coupling part 114 , the second coupling part 116 and the engaging part 118 respectively. The diameter length of the shaft 138 is slightly smaller than the through hole 124A of the cylinder 124, so that the shaft 138 can be inserted into the through hole 124A of the cylinder 124, and the cylinder 124 just passes through the guide groove 146 of the engaging part 118, so that The second coupling part 116 and the engaging part 118 can rotate relative to the first coupling part 114 , so that the handle 104 can rotate relative to the seat 102 . As shown in Figure 4, by the action of the spring 148, the engaging part 118 can be in the locked position, so that the pressing part 118A of the engaging part 118 protrudes outside the first coupling part 114 and the second coupling part 116, the first The engaging block 142 engages with the first engaging groove 126, the abutting portion 145 abuts against the outer wall 120A, and the second engaging block 144 engages with the fourth engaging groove 132, so as to lock the handle 104 in a A first position (such as the position shown in FIG. 1 ).

As shown in FIG. 5 , the user can press down the pressing portion 118A of the engaging member 118 so that when the engaging member 118 moves from the locking position to the unlocking position, the engaging member 118 will be displaced along the slide groove 140 and compress the spring 148 , and the first engaging block 142 and the second engaging block 144 are separated from the first engaging groove 126 and the fourth engaging groove 132 respectively, so the user can turn the handle 104 until the handle 104 reaches the desired position, and then The pressing part 118A of the engaging part 118 is released, and the elastic restoring force of the spring 148 will drive the engaging part 118 to return to the locked position, so as to lock the position of the handle 104 again.

As shown in FIGS. 3 to 5 , the present invention can set engaging positions along different radial directions, so that the handle 104 can be adjusted and locked in different positions.

FIG. 6 shows a perspective view of the handle 104 of the child safety seat 100 locked in the second position. When the handle 104 is locked at the second position, the first engaging block 142 is engaged with the second engaging slot 128 , and the second engaging block 144 is engaged with the fifth engaging slot 134 . When the handle 104 is in the second position, it can extend approximately behind and above the child safety seat 100 to reduce the space occupied by the child safety seat 100 .

FIG. 7 shows perspective views of the handle 104 of the child safety seat 100 locked in the third position. When the handle 104 is locked at the third position, the first engaging block 142 is engaged with the third engaging slot 130 , and the second engaging block 144 is engaged with the sixth engaging slot 136 . When the handle 104 is in the third position, it can extend to the rear and the bottom of the child safety seat 100 and approach the surface supporting the child safety seat 100 , so as to provide a stable conflict with the support rail 106 for the child safety seat 100 support.

FIG. 8 is a perspective view of the child safety seat 200 provided by the second embodiment of the present invention. As shown in FIG. 8 , the child safety seat 200 includes a seat 202 and a handle 204 . The seat 202 can be an integrally formed plastic shell, including a pair of side barriers 206 (only one is shown in the figure), a seating portion 208 and a backrest 210 . The lower ends on both sides of the handle 204 are respectively pivotally connected to the two side stoppers 206 .

FIG. 9 shows a perspective view of the handle 204 , and FIG. 10 shows a partially enlarged view of FIG. 9 . As shown in Figures 9 and 10, the handle 204 includes a transverse portion 204A and two side portions 204B, 204C, the side portions 204B, 204C are respectively connected to the left and right ends of the transverse portion 204A, and the sides of the two side portions 204B, 204C The lower ends are respectively connected with two second coupling members 214 .

Each second coupling piece 214 has an approximately cylindrical shape. A shaft 216 protrudes from the center of each second coupling member 214 . A first sliding slot 220 and an engaging member 222 are disposed inside each second coupling member 214 , and the engaging member 222 is slidably disposed on the first sliding slot 220 . A first engaging piece 224 and a second engaging piece 226 protrude from one surface of the engaging piece 222 , and the engaging piece 222 is provided with a long shape between the first engaging piece 224 and the second engaging piece 226 . The guiding groove 228 and two engaging holes 230 are respectively located on two sides of the guiding groove 228 . A spring 232 is also disposed inside the second coupling member 214 , and two ends of the spring 232 abut against an inner wall 214A of the second coupling member 214 and one end of the engaging member 222 respectively.

Continuing to refer to FIG. 9 , the outer surface of the second coupling member 214 is provided with a second sliding groove 234 and an operating member 236 , and the operating member 236 is slidably disposed in the second sliding groove 234 . As shown in the figure, the operating part 236 is flat and can be close to the outer surface of the second coupling part 214, so as to enhance the aesthetic feeling of the overall appearance. A pair of engagement protrusions 238 protrude from a surface of the operating member 236 facing the second coupling member 214, and oppositely, the second coupling member 214 is provided with two slots 240 (shown in dotted lines in FIG. 10 ), and The pair of engaging protrusions 238 respectively pass through the two slots 240 and engage with the two engaging holes 230 of the engaging member 222 so as to fix the operation member 236 and the engaging member 222 . In this way, the user can drive the engaging member 222 inside the second coupling member 214 to move in the first sliding slot 220 by operating the operating member 236 outside the second coupling member 214 to switch the locking position of the engaging member 222 and unlock position.

FIG. 11 and FIG. 12 are partial cross-sectional schematic diagrams of the engaging member 222 in the locked position and the unlocked position, respectively. Each side stopper 206 is connected with a first coupling piece 212 , which has a cylindrical shape roughly corresponding to the second coupling piece 214 . A cylinder 218 protrudes from the center of the first coupling 212, and the shaft 216 of the second coupling 214 can be inserted into the cylinder 218 of the first coupling 212, and the cylinder 218 can just pass through the guide. The guiding groove 228 enables the second coupling part 214 and the engaging part 222 to rotate relative to the first coupling part 212 .

Like the aforementioned embodiments, the first coupling member 212 further includes a first concave portion 242 and a second concave portion 244 inside. The outer wall of the first concave portion 242 defines different engagement positions along different radial directions, such as first, second and third engagement grooves 246 , 248 , 250 . The inner sidewall of the second concave portion 244 respectively defines a plurality of engaging positions along different radial directions, such as fourth, fifth and sixth engaging grooves 252 , 254 , 256 . The first engaging groove 246 and the fourth engaging groove 252 are located on the same diameter, and the distance between the first engaging groove 246 and the pivot 219 is far, and the distance between the fourth engaging groove 252 and the pivot 219 is relatively short. The second engaging groove 248 and the fifth engaging groove 254 are located at another diameter, and the distance between the second engaging groove 248 and the pivot 219 is far, and the distance between the fifth engaging groove 254 and the pivot 219 is relatively short. close. The third engaging groove 250 and the sixth engaging groove 256 are located on the same axis, and the distance between the third engaging groove 250 and the pivot 219 is far, and the distance between the sixth engaging groove 256 and the pivot 219 is relatively short. .

Due to the action of the spring 232, the engaging part 222 can be maintained at the locking position, so that the first engaging block 224 is engaged with the first engaging groove 246, and the second engaging block 226 is engaged with the fourth engaging groove 252. snap, thereby locking the position of the handle 204 .

As shown in FIG. 12 , the user can operate the operating part 236 on the outside of the second coupling part 214, so that the engaging part 222 moves from the locking position to the unlocking position and compresses the spring 232, while the first engaging block 224 and the second engaging part 224 The two engaging blocks 226 are disengaged from the first engaging groove 246 and the fourth engaging groove 252 respectively, so that the handle 204 can rotate relative to the seat 202 until the handle 204 is adjusted to a desired position, and then the operating member 236 can be released. The elastic recovery force of the spring 232 will drive the engaging member 222 to return to the locking position (for example engaging with the second engaging groove 248 and the fifth engaging groove 254, or engaging with the third engaging groove 250 and the sixth engaging groove 250). slot 256) to lock the position of the handle 204.

At least one advantage of the present invention is to provide a child safety seat. The adjustment mechanism between the handle and the seat of the child safety seat uses few components, so it is easy to operate without going through the interlocking process of multiple components. The locked state and unlocked state of the handle can be switched directly and quickly, so as to change the posture of the handle. In addition, because fewer parts and components are used, the weight of the handle and the manufacturing cost are relatively reduced.

The above description is based on multiple different embodiments of the present invention, wherein each feature can be implemented singly or in different combinations. Therefore, the disclosure of the embodiments of the present invention is a specific example to illustrate the principles of the present invention, and the present invention should not be limited to the disclosed embodiments. Furthermore, the foregoing descriptions and accompanying drawings are merely illustrative of the present invention and are not intended to limit it. Changes or combinations of other elements are possible without departing from the spirit and scope of the present invention.

Claims (14)

1. a child safety seat, is characterized in that: comprising:

One seat, the both sides of this seat are respectively provided with one first male part, and in this first male part, are provided with several engagement grooves;

Leader, the both sides of this handle are respectively provided with one second male part, this handle sees through this 2 second male part and is articulated with a pivot with this 2 first male part respectively, in this second male part, is provided with a chute, and the outer surface of this second male part is provided with one second chute;

One engagement piece, at least be provided with a clamping block, a guide channel and two connecting holes, this two connecting hole lays respectively at the both sides of this guide channel, this pivot wear and slip in this guide channel, this engagement piece be slidedly arranged on this chute and and can be between a latched position and a unlocking position displacement, when this engagement piece is during in this latched position, this clamping block and this engagement groove fasten to lock this handle; When this engagement piece is during in this unlocking position, this clamping block departs from this engagement groove, so that this handle can be with respect to this seat rotation; And

One operating parts, this operating parts is slidedly arranged in this second chute and presses close to the outer surface of this second male part, wherein, the surface that this operating parts regards to this second male part is equipped with a pair of engaging projection, this second male part relatively offers two flutings, and this is to these two the connecting hole clampings with this engagement piece by this two fluting respectively of engaging projection, so that this operating parts and this engagement piece fix.

2. child safety seat as claimed in claim 1, it is characterized in that: the inside of this first male part includes one first recess and one second recess, and the home position of this first male part is equipped with a cylinder towards this second male part, and this cylinder is provided with a perforation and this cylinder between this first recess and this this second recess.

3. child safety seat as claimed in claim 2, it is characterized in that: on a sidewall of this first recess along Different Diameter to first, second and third engagement groove is set respectively, on one sidewall of this second recess along Different Diameter to the 4th, the 5th and the 6th engagement groove is set respectively, wherein, this first engagement groove and the 4th engagement groove are positioned at same axis, this second engagement groove and the 5th engagement groove are positioned at same axis, and the 3rd engagement groove and the 6th engagement groove are positioned at same axis.

4. child safety seat as claimed in claim 3, it is characterized in that: the home position of this second male part is equipped with an axis body towards this first male part, and this axis body is plugged in the perforation of this cylinder to form this pivot between this first male part and this second male part, wherein, distant between this first engagement groove and this pivot, close together between the 4th engagement groove and this pivot, distant between this second engagement groove and this pivot, close together between the 5th engagement groove and this pivot, distant between the 3rd engagement groove and this pivot, close together between the 6th engagement groove and this pivot.

5. child safety seat as claimed in claim 4, is characterized in that: this surface that this engagement piece regards to this first male part is equipped with one first clamping block and one second clamping block, and this guide channel is between this first clamping block and this second clamping block.

6. child safety seat as claimed in claim 4, is characterized in that: between the inside of this second male part and this engagement piece, be also provided with a spring, and the two ends of this spring are individually fixed in this pivot and this engagement piece.

7. child safety seat as claimed in claim 5, it is characterized in that: when this engagement piece is during in this latched position, this first clamping block and this second clamping block can be sticked in respectively this first engagement groove and the 4th engagement groove, to lock this handle in a primary importance.

8. child safety seat as claimed in claim 5, it is characterized in that: when this engagement piece is during in this latched position, this first clamping block and this second clamping block can be sticked in respectively this second engagement groove and the 5th engagement groove, to lock this handle in a second place.

9. child safety seat as claimed in claim 5, it is characterized in that: when this engagement piece is during in this latched position, this first clamping block and this second clamping block can be sticked in respectively the 3rd engagement groove and the 6th engagement groove, to lock this handle in one the 3rd position.

10. child safety seat as claimed in claim 4, it is characterized in that: this surface that this engagement piece regards to this first male part is equipped with one first clamping block and one second clamping block, and between this first clamping block and this second clamping block, offer this guide channel and this two connecting holes.

11. child safety seats as claimed in claim 10, is characterized in that: be also provided with the spring that two ends are connected to respectively this second male part and this engagement piece.

12. child safety seats as claimed in claim 10, it is characterized in that: when this engagement piece is during in this latched position, this first clamping block and this second clamping block can be sticked in respectively this first engagement groove and the 4th engagement groove, to lock this handle in a primary importance.

13. child safety seats as claimed in claim 10, it is characterized in that: when this engagement piece is during in this latched position, this first clamping block and this second clamping block can be sticked in respectively this second engagement groove and the 5th engagement groove, to lock this handle in a second place.

14. child safety seats as claimed in claim 10, it is characterized in that: when this engagement piece is during in this latched position, this first clamping block and this second clamping block can be sticked in respectively the 3rd engagement groove and the 6th engagement groove, to lock this handle in one the 3rd position.